QUESTION: So when I see $out in a builder script, it refers to the default output path because the output attribute in the Nix expression has never been explicitly set, right?

Organically related to the annotation regarding my nix-shell confusion.

The dissection of this definition to show why I find it lacking:

A description of a build action.

The first (couple) time(s) I read the manuals, this description popped up in many places, and I identified it with Nix expression every time, thinking that a derivation is a synonym for Nix expression.

Maybe it is, because it clearly tries to disambiguate between store derivations and derivation in the last sentence.

The result of a derivation is a store object.

Is this store object the same as a store derivation?

Derivations are typically specified in Nix expressions using the `derivation primitive. These are translated into low-level store derivations (implicitly by nix-env and nix-build, or explicitly by nix-instantiate).

QUESTION: So, the part of the Nix build expression (such as default.nix) where the derivation primitive is called (explicitly or implicitly, as in mkDerivation) is the derivation, that will be ultimately be translated into store derivations?

ANSWER: Start at section 15.4 Derivation.

QUESTION: Also, why is typically used here? Can one define derivations outside of Nix expressions?

ANSWER(?): One could I guess, because store derivations are ATerms (see annotation at the top), and the Nix expression language is just a tool to translate parameterized build actions into concrete terms to build a software package. The store derivations could be achieved using different means; e.g., the way Guix uses Guile scheme to get the same result))

I believe, that originally, derivation was simply a synonym to store derivation. Maybe it still is, and I'm just having difficulties with reading comprehension but I think the following would be less misleading (to me and apart from re-writing the very first sentence):

Derivations are typically the result of Nix expressions calling the derivation primitive explicitly, or implicitly usingmkDerivation`. These are translated into low-level store derivations (implicitly by nix-env and nix-build, or explicitly by nix-instantiate).

QUESTION: Does this refer to pkgs/stdenv/generic/setup.sh? According to 6.5 Phases in the Nixpkgs manual?

ANSWER: I'm pretty sure it does. It sets up the environment (not sure how yet; I see the env vars, but not the basic commands - sed, awk, etc. - that are listed below) and defines a bunch of functions (such as genericBuilder) but it doesn't call these functions!

this is another key topic. Also:

• substitute vs. substituter => this (I think)

See annotations with the substitute tag

binary caches tie in with substitutes somehow; get to the bottom of it. See annotations with the substitute tag.

Maybe this?

Why?

Answer is below in the manual: https://hyp.is/qRSFdnCJEeueY8NWtMIeHw/toraritte.github.io/saves/Nix-Package-Manager-Guide-Version-2.3.10.html

Would have been nice to link these to the install chapter where single- and multi-user modes were mentioned.

How would this look in a topic-based documentation? I would think that his chapter would be listed in the pre-requisites, and it could be used to buld different reading paths (or assemblies in DocBook, I believe) such as practical, depth-first (if there are people like me who want to understand everything first), etc.

https://en.wikipedia.org/wiki/Reentrancy_(computing)

What is happening here exactly?

nix-shell's syntax synopsis always bugged because it looks like this

SYNOPSIS
nix-shell [--arg name value] [--argstr name value] [{--attr | -A} attrPath] [--command cmd] [--run cmd] [--exclude regexp] [--pure] [--keep name] {{--packages | -p} packages...  | [path]}

and the canonical example is nix-shell '<nixpkgs>' -A pan; what tripped me up is that path is usually the first in examples, and I thought that the position of arguments are strict. As it turns out, nix-shell -A pan '<nixpkgs> is just as valid.

Side note<br> Apparently there is no standard for man pages. See 1, 2.

'<nixpkgs>' path is the one specified in the NIX_PATH environment variable, and -A pan looks up the pan attribute in pkgs/top-level/all-packages.nix in the Nixpkgs repo.

QUESTION: What is a fixed-point of a function?

ANSWER: See this video) at least, and the Fixed-point (mathematics)) wikipedia article:

In mathematics, a fixed point (sometimes shortened to fixpoint, also known as an invariant point) of a function is an element of the function's domain that is mapped to itself by the function. That is to say, c is a fixed point of the function f if f(c) = c. This means

f(f(...f(c)...)) = f n(c) = c

an important terminating consideration when recursively computing f. A set of fixed points is sometimes called a fixed set.

For example, if f is defined on the real numbers by f(x)=x^{2}-3x+4,}, then 2 is a fixed point of f, because f(2) = 2.

There is also the wiki article fixed-point combinator that actually plays a role here, but read through the articles in this order.

Then dissect the Stackoverflow thread What is a Y combinator?, and pay attention to the comments! For example:

According to Mike Vanier's description, your definition for Y is actually not a combinator because it's recursive. Under "Eliminating (most) explicit recursion (lazy version)" he has the lazy scheme equivalent of your C# code but explains in point 2: "It is not a combinator, because the Y in the body of the definition is a free variable which is only bound once the definition is complete..." I think the cool thing about Y-combinators is that they produce recursion by evaluating the fixed-point of a function. In this way, they don't need explicit recursion. – GrantJ Jul 18 '11 at 0:02

(wut?)

Other resources in no particular order:

• google search for "fixpoint evaluation fixed point combinator explained"
• Cornell's CS 6110 S17 Lecture 5
• google search for "fixed-point of a function"
• Fixed-point theorem (wikipedia)
• How can I find the fixed points of a function? (math stackexchange)
• The Y Combinator (Slight Return) (see the "Fixpoint of functions" section)
• Clear, intuitive derivation of the fixed-point combinator (Y combinator)? (computer science stackexchange)
• Fixed-Point Combinators (stackoverflow)
• Fixed-point combinator (HandWiki)

QUESTION: How the hell did they come up with the idea of using this with Nix and package management? (..and who? I remember a video saved somewhere, but maybe that was about overlays)

QUESTION: ... and how does it work in this context?

ANSWER: Well, not an answer yet, but this may be something in the right direction:

http://blog.tpleyer.de/posts/2020-01-29-Nix-overlay-evaluation-example.html

QUESTION: What is ldconfig cache?

QUESTION: What is libc and why does Bash need it?

QUESTION: So the Nix store houses derivations and not the built packages?

QUESTION: Are the hashes in the Nix store not unique?

How can they exist and it still be considered pure??

I guess that's not quite the same / as bad as saying something had side effects in a purely functional programming context, right?

Question to myself: Is not having to think about it actually a good goal to have? Is it at odds with making intentional/well-considered decisions?  Obviously there are still many of interesting decisions to make even when using a framework that provides conventions and standardization and makes some decisions for you...

What is the opposite of free content?

The opposite of free/open-source software is proprietary software or non-free software (https://en.wikipedia.org/wiki/Proprietary_software).

So should we call the opposite of free content "non-free content"? Or "proprietary content"?

Seems likes either would be fine.

Looks like https://en.wikipedia.org/wiki/Wikipedia:Non-free_content prefers the term "non-free content".

Couldn't find anyone contrasting these 2 terms (like I could no doubt find for software):

• https://duckduckgo.com/?q=+%22non-free+content%22+%22free+content%22
• https://duckduckgo.com/?q=%22proprietary+content%22+%22free+content%22&ia=web

Not to be confused with:

• paid content ... just like:
• free content should not be confused with gratis content (?)
• free software should not be confused with freeware

Vries, L. de, Weijer, M. van de, Pelt, D., Ligthart, L., Willemsen, G., Boomsma, D., Geus, E. de, & Bartels, M. (2021). Individual differences in the effect of the COVID-19 pandemic on optimism and meaning in life. PsyArXiv. https://doi.org/10.31234/osf.io/b2ge6

Didn't they mean what mkDerivation requires?

I have been jumping around in this manual, so not sure about what arguments does derivation require.

The author is asking a rhetorical question and answering it immediately. He is doing this not only to clear one of the audience's questions regarding the consequences of Texas situations, but also to make the government officials more guilty for leaving Texas in this situation.

How is this better than simply:

Add.run(x: x, y: 3)

?

I guess if we did that we would also have to remember to handle merging errors from that outcome into self...

TODO: Find other sources about this topic. I remember this mentioned already (and it makes) sense, but need to learn more.

TODO: What is a better alternative? An own repo? Flakes? Can cachix help?

It says right below that pinning can help but keep looking.

When package reproducibility become a major concern, as it is the case in this tutorial, it is preferable to refer to a pinned version of the nixpkgs repository instead — i.e, a specific commit of the repository or an immutable archived tarball. The ability to pin the version of nixpkgs is powerful, it will ensure that a package is always constructed from the same Nix source. As we go deeper in the tutorial we avoid using channels in favor of pinned environments.

what is the meaning of this???

Question: How do they measure the value of import services?

最大的sigma代数是\(\mathcal{F}\)?

• sigma代数的大小如何理解？
• 信息的定义？

Dyer, C. (2021). Covid 19: How to feel safe working on the front line—your legal and ethical questions answered. BMJ, 372, n179. https://doi.org/10.1136/bmj.n179

Does this relate and increase how it impacts the pollution aspect compared to if it had been someone without asthma?

How would this relate and compare to other countries in general? Or in more specific areas in places that have higher amounts of people dying from pollution?

Doesn't this contradict the statement

This strategy plays well with most other Devise strategies

(which includes password strategies)?

One thing that wasn't clear from their instructions was whether magic links could be used as an option in addition to regular password log-ins. On the one hand they say:

This strategy plays well with most other Devise strategies (see notes on other Devise strategies).

but on the other hand they say:

you'll want to update Devise's generated views to remove references to passwords, since you don't need them any more

We continually see Juno try to intervene, all the while working in accordance with the will of Jupiter and the fates. This begs the question, are gods bound by the fates, or do they shape them? Juno is queen of heaven, a leader of the gods, so why cant she shape fate as Jupiter seems to be able to?

Head Scratcher: using this simple explanation of "unfamiliar" we can see that it is difficult to navigate through territory that has not been properly formed yet or mapped out.

How do we move forward as Instuctional Designers into the future of Education and Instruction?

My best efforts so far have been to never be afraid to try new models or technology to lead your instruction.

Head Scratcher: How do you teach "cleverness"? This is a tough question and I feel that it is hard to understand for most instructors. How do I get my students to be more creative and clever, I believe we usually feel that students either are or are not creative and thats the end of the story. So really maybe we are the ones at fault for not teaching studetns to be "creative".

Headscratcher: How do we make sure, in our times creating instuction, that we do not neglect a medium that could be used for instruction?

I feel that one way could be to allow learners choice in how they respond to prompts and learning. I feel that this could allow for students to use their gifting and talents to excel and produce amazing work.

Example question. Note the "question" tag.

An interesting concept I'd like to consider and interrogate. Does exacerbating and essentially parodying gender roles ACTUALLY work to dismantle those roles, or does it enforce them?

No strong opinion yet. Come back to this.

Could there be any other reason or meaning behind the confusing of a pimple with a blue-grey spider, except for the narrator being drunk?

Below it mentions a value of off, where does -1 come from? And since --vfs-read-chunk-size has a nonzero default value does that mean that this feature is on by default, and with an unlimited limit?

what is the exact meaning about this sir

which type of varibles

But can causal conclusions be drawn about the conjunction of the manipulated and non-manipulated variables? Would Schnall and colleagues be justified in concluding that disgust and body consciousness together affect the harshness of moral judgments?

Is this the correct region?

Why do you think this shift happened?

github-dialogpt traning problem

This is a very logical explanation provided for why S. cerevisiae is a strong candidate for the organism for the experiment because of its efficient homologous recombination, however since it notes E. coli has a superior transformation efficiency, why isn't that used instead?

I wonder if there are any statistics that show what students prefer?

I feel like students do not understand that Snapchats, Instagram, Youtube are considered digital annotations because when students are using these technological tools, they are just having fun. In order to teach them that these tech tools are digital annotations, we as teachers need to help them connect the phrase "digital annotation" to these technology tools.

what do these mean?

What is industrial and financial capitalism???

Subject = American Conquest EQ = Who won and lost and why? Activities:

What if there's an icon that I need that's not in this set?

How do I add a custom icon to the set for use on a web page and have the custom icon styled the same way as these "standard" icons?

Like how they have instructions for adding an icon here, for example: https://www.digitalocean.com/community/tutorials/angular-custom-svg-icons-angular-material#custom-svg-icons

Will the entire transaction be canceled? "Transaction" in the name of this a section implies yes, but what if all the recipients are valid?

See replies below but the answer is no; an RCPT command is specified for each recipient in the mail data, these RCPT commands will be evaluated in sequence,, and any SMTP (error) notifications will be sent to the address in the MAIL FROM command (which is not necessarily the same as the mail data's From: header).

How could this specific scenario be even possible? It just said in the previous paragraph that

If there was no MAIL, or no RCPT, command, or all such commands were rejected, the server MAY return a "command out of sequence" (503) or "no valid recipients" (554) reply in response to the DATA command.

This was unexpected; why wasn't the canonical format (i.e., 5xx) used instead?

what is the difference b/w single > and double >> ????

what indicates this dollar symbol ?

Wouldn't/shouldn't it be the other way around — wouldn't we wait until the save is completed (database is updated) successfully before we navigate away from the current page/form??

Do you keep the promises you have made and lay them up against your daily actions to see how they square? Is this what we mean by ethics and reflection?

Is Ortiz talking about a promise made or about the promise implied by our very identity, our very selves.

一头雾水 总的来讲.是为了初始化C语言运行环境设置的一坨东西

who?

What is the difference between provisioning and deployment?

Did Odysseus really need to give the cyclops the wine to trick him given what has happened?

Given that Odysseus was clever enough to fool the cyclops regarding his name, what do you think instigated Odysseus to give away his trick?

Side note: The saying that a magician should never reveal his secrets.

Is Baldwin talking educational reform or revolution?

Does this translate to learning in higher ed at a distance?

What do they mean by expandable here?

definition: able to be made larger or more extensive.

The research study, 'An Ethnographic Study of Motivations of Foodstagrammer tourists' highlights how a research question may be portrayed by using a broad research statement to identify their overarching focus of inquiry as opposed to directly stating a research question. In this study, it is found in the goals of the study and could be converted to a question format. Stating the purpose for the inquiry works as effectively as proposing a prompt research question.

Why does google straight allow terrible thing to be presented and will only remove unlawful content? Hopefully if you search some of these words that show explicit things that they warn some people may feel disgusted or get offended. Most of the information is also incorrect so they are providing false things

I think the main thing wrong with it is the eval (which I think can be changed to $("$@") and it's pretty verbose.

Also, there are more concise ways to do it that would probably appeal more to most bash experts...

like set -x

and it does unnecessary things: why save output to a variable? Just let output go to where it would normally go...

So yeah, I can see why this solution isn't very popular. And I'm rather surprised by all the praise comments it's gotten.

How does Chinese cancel culture differ from American cancel cuture? Is this phenomenon different worldwide?

How do did they code the "utterances" of students?

Actually, the answer that was given was a good answer, as it pointed to the problem: It was a reminder that you need to:

assign to a locally declared variable.

So I'm not sure the answer was intended to "just" be a solution/workaround, but to help correct or fill in the misunderstanding / forgotten piece of the puzzle to help OP realize why it wasn't working, and realize how reactivity is designed to work (based on assignments).

It was a very simplified answer, but it was meant to point in the right direction.

Indeed, it pointed to this main point that was explained in more detail by @rixo later:

Personally, this also totally aligns with my expectations because in your function fruit can come from anywhere and be anything:

Which character is this referring to exactly?

It looks like the empty string, which wouldn't make sense.

https://www.postgresql.org/docs/13/functions-matching.html only lists these 2:

If pattern does not contain percent signs or underscores, then the pattern only represents the string itself; in that case LIKE acts like the equals operator. An underscore (_) in pattern stands for (matches) any single character; a percent sign (%) matches any sequence of zero or more characters.

Stereotype threat is an important factor in student performance that faculty should be aware of, particularly with marginalized students and adult learners who may not identify as successful students, but how does it affect their own performance as instructors? If they care about teaching, but don't identify primarily as instructors, does this limit their teaching ability?

How do social dimensions of identity influence instructional decisions?

Is this the same for instructors? Does priming them to adult a multicultural mindset support more divergent thinking about instructional strategies and students' needs?

Is this contrary to what they said above about adults remembering more aspects of episodes? How does this decline in episodic memory affect learning in adults?

How does this affect instructional design? If adults are better at remembering experiences, should instructional include more experiential learning?

Is there a connection between SEL and EF?

Why does Homer go into such detail about the way that heroes die? Most modern writing doesn't go into this level of detail. Is this something the greeks enjoyed hearing about?

Good question: Why do the big players like Azure not seem to worry? Microsoft, Amazon, Google, etc. too probably. In fact, any email provider. So once someone knows your email address, you are (more) vulnerable to someone trying to hack your account. Makes me wonder if the severity of this problem is overrated.

Irony: He (using his full real name) posts:

1. Information about which account ("my Azure account is my email address"), and
2. How high-value of a target he would be ("both sites manage highly valuable information that could take a whole company out of business...")

thus making himself more of a target. (I hope he does not get targetted though.)

Interesting depiction of the actual size of gods here. If Poseidon was this large, how large would other gods appear such as Zeus? Or even Cronus, as literature suggests he too has a physical form. Would gods be able to show their true form to humans? Or is this why Zeus often appears as other beings when interacting with mortals.

Another example:

const expensiveOperation = async (value) => {
  // return Promise.resolve(value)
    // console.log('value:', value)
    await sleep(1000)
    console.log('expensiveOperation: value:', value, 'finished')
    return value
}

var expensiveOperationDebounce = debounce(expensiveOperation, 100);

// for (let num of [1, 2]) {
//   expensiveOperationDebounce(num).then(value => {
//     console.log(value)
//   })
// }
(async () => { await sleep(0   ); console.log(await expensiveOperationDebounce(1)) })();
(async () => { await sleep(200 ); console.log(await expensiveOperationDebounce(2)) })();
(async () => { await sleep(1300); console.log(await expensiveOperationDebounce(3)) })();
// setTimeout(async () => {
//   console.log(await expensiveOperationDebounce(3))
// }, 1300)

Outputs: 1, 2, 3

Why, if I change it to:

(async () => { await sleep(0   ); console.log(await expensiveOperationDebounce(1)) })();
(async () => { await sleep(200 ); console.log(await expensiveOperationDebounce(2)) })();
(async () => { await sleep(1100); console.log(await expensiveOperationDebounce(3)) })();

Does it only output 2, 3?

This is where you can type your notes.

I don't understand the need for the name "Open–closed principle". It doesn't seem meaningful or clear to me.

Can't we just call it "extensibility" or "easily extendable"? Doesn't "extensibility" already imply that we are extending it (adding new code on top of it, to interoperate with it) rather than modifying its source code?

Sure, we don't need to add any additional indent. But what if your code block contains indentation (function body)? It would look silly to remove all leading indentation.

Smedsrud et al. (2017) point to the fact that the AO - Fram Strait export correlation is non-stationary in time. The results presented here are in line with what Smedsrud et al. report for the 21st century. Yet, I am curious about the earlier period, do you see any correlation between drift and AO in earlier periods of the FESOM simulations?

I find this section very convincing!

One additional suggestion, still. What do the sea ice area export curves look like in the FESOM simulations? I am assuming that if you were to look at area export (function of ice drift and ice concentration), you would get a similar picture to Fig. 3c - i.e.: slightly positive trends, with the variability almost entirely explained by winds. Is it possible to show that (additional panel in Fig. 3)? I believe it would bring yet an another argument supporting that the long term trend in volume export has to be thickness driven.

Why not calculate correlations with SLP over land? There might be some interesting connections when thinking about high pressure systems above Greenland?

In Fig. 2b - the observations are the Cryosat-2 thicknesses, correct?

I understand that CMST assimilates sea ice thickness from Cryosat-2. Therefore, why is there such an important discrepancy in the ice thickness in Fram Strait between CMST and the observations?

how do you differentiate the lien between projection between an object and engagement to a subject

why does the robot carry a presence without action? do the roles we assign it carry over more than we consciously realize

Does "u is a utility function for \($\succsim$\)" mean that the utility function 'represents' \($\succsim$\)/

Inc, T. (n.d.). Independent SAGE @IndependentSage. Periscope. Retrieved 9 October 2020, from https://www.pscp.tv/IndependentSage/1lDGLyjNXLLJm

Is that expected behavior or am I doing something wrong?

This helps to address the institutional type question

Do you have a bookshelf? What percentage of the books that you own are paper and what digital?

This word is ambiguous. It has several meanings. This is what poet thinking is all about for me--subverting the routine. First, the word is about fire, right, but if you have every looked at my posts (count on two hands my very fine viewership) you know that I write about trail blazes. I want the word to be a fork and to mean both of these simultaneously. My poems are designed to carry a lot of freight. What do you think about ambiguity?

What ethical blazes have books kindled in you? Most poetry tries to freshen the language. Most poets are work necromancers. They bring what is routine and everyday back into clear and plain air. This is called a metaphor. Values don't really burn, but I am trying to conjure up a feeling here where what we believes has the intensity of a fire. I am trying to do that with a few words and not a lot like here. Maybe poetry is all about translation and summary put together. What do you think poetry is supposed to be or do?

how many types of flow of execution are there in python?

what is math function and use of it in python ?

Why does he think they are dangerous?

Do the inequality constrains have to be convex functions as well? This is not considered in def. 2.13.

So the posted answer wasn't necessary/correct? Which part of the answer was incorrect/unneeded?

I wish this OP comment included the full version of code that worked.

I don't understand this OP comment. Wasn't OP already returning loginDaoCall? So maybe the only thing they could mean is that they just needed to change it to return loginDaoCall.then(...) instead...

That would be consistent with what the answer said:

the promise returned by the further .then() does also get rejected and was not handled.

So I guess the unnecessary part of the answer was adding the return true/false...

Why do you think when the Trojans are mentioning the Greeks they mention them as "long-haired Achaeans"?

My take on it is that its an insult as to call them out to look like women because they have long hair as Homer does include insults that relate to the opposite sex.

Why do you think the statement of "handsomest of men" was used by Homer when it is stated that Hector is insulting him?

In my opinion, he is trying to create a reflection of how he looks the part of a hero but, lacks the internal motivations to be a real hero.

Why don't you provide a straightforward way to download the annotation data from the user's account?

what is debugging

what is program

what is variable?

uses of list

But I think this is a solved problem with current Svelte: just pass the lets to the slot content, and the slot content can decide how to pass those let props on to any or all of its child elements as it sees fit...

Can this word be used to describe the property in computing where a value can be dynamic? I feel like "dynamicness" would be a better term for this.

It seems to refer more to personality:

1a: marked by usually continuous and productive activity or change a dynamic city b: ENERGETIC, FORCEFUL a dynamic personality

See also the same sentiment here: https://news.ycombinator.com/item?id=4137596

Why does the Iliad repeatedly mention who Agamemnon's father is?

Does this mean, if I'm naturally slow to react even in real life, it'll be exhausting for the interlocutor?