naming

问题 Does the YYYY-MM-DD HH:MM:SS datetime format have a special name? I am writing a function that returns a date in this format and I'm trying to figure out what to call the function. 回答1: I can't find a source, but in my experience (25 years working as a systems programmer in UNIX environments) this format is referred to colloquially among engineers as Yoda Time. It's not valid ISO 8601 because it uses a space instead of a T to separate the date and time parts. 回答2: It looks a lot like ISO 8601

问题 Does the YYYY-MM-DD HH:MM:SS datetime format have a special name? I am writing a function that returns a date in this format and I'm trying to figure out what to call the function. 回答1: I can't find a source, but in my experience (25 years working as a systems programmer in UNIX environments) this format is referred to colloquially among engineers as Yoda Time. It's not valid ISO 8601 because it uses a space instead of a T to separate the date and time parts. 回答2: It looks a lot like ISO 8601

问题 I was working on a toy project and tried using some unicode variable names to match a paper I was attempting to implement. The following code works fine on R 3.4.3 on Windows (RStudio version 1.1.456) and R 3.5.1 on OSX: > µ <- function(ß, n) ß * n > µ(2, 3) [1] 6 This code gives the following error, with α typed as ALT+224: > α <- 2 Error: unexpected input in "\" The file was saved as UTF-8, so this is surprising to me. make.names is consistent with the results above: > make.names('µ') [1]

问题 I have and Android app with the view class ( Fragment , Activity ) observing its ViewModel . The ViewModel exposes methods such as getUserName which returns Observable<String> . Although maybe there is a possibility to find a better name (maybe observeUserName ), I'm happy with the current one - it is quite explanatory. However, here starts the hard part: ViewModel also can tell the view to perform some operation - for example close itself, pop backstack etc. For this case ViewModel defines

问题 How can I store a string (e.g., the column range "cyl:drat, vs:gear" ) so that I can use it in a function where it should not be interpreted as character string? For example, I would like to execute the following command: subset(mtcars, select=c(disp:drat, vs:gear)) But assign the content for select to a variable x : x <- as.name("cyl:drat, vs:gear") subset(mtcars, select=x) #Error in x[j] : invalid subscript type 'symbol' library(rlang) x <- quo(!! sym("cyl:drat, vs:gear")) subset(mtcars,

问题 How can I store a string (e.g., the column range "cyl:drat, vs:gear" ) so that I can use it in a function where it should not be interpreted as character string? For example, I would like to execute the following command: subset(mtcars, select=c(disp:drat, vs:gear)) But assign the content for select to a variable x : x <- as.name("cyl:drat, vs:gear") subset(mtcars, select=x) #Error in x[j] : invalid subscript type 'symbol' library(rlang) x <- quo(!! sym("cyl:drat, vs:gear")) subset(mtcars,

问题 The code I am working with takes in a .pdf file, and outputs a .txt file. My question is, how do I create a loop (probably a for loop) which runs the code over and over again on all files in a folder which end in ".pdf"? Furthermore, how do I change the output each time the loop runs so that I can write a new file each time, that has the same name as the input file (ie. 1_pet.pdf > 1_pet.txt, 2_pet.pdf > 2_pet.txt, etc.) Here is the code so far: path="2_pet.pdf" content = getPDFContent(path)

问题 I was wondering if there is widely recognized name for === operator. Something like "IIFE" for (function () {})(); 回答1: I was wondering if there is widely recognized name for === operator. The names I've heard most commonly are strict equality operator and strict equals operator . And it turns out that arguably, it has both those names: The old spec called it the strict equals operator: 11.9.4 The Strict Equals Operator ( === ) The production EqualityExpression : EqualityExpression ===

问题 I have a React site currently in JavaScript/ES that we are converting to TypeScript (🎉). We use the Container and Presentational breakdown, so each component will have either a Container and a Presentational file, or for simpler components just a Presentational file. Over the course of a build, we will typically build "static" Presentational screens/components first, get them to pass design QA, and then make them dynamic by adding a Container. That means that the Presentational files are

问题 I have a method that performs an action and returns a value. For example from the input number it will update class's input history, then generate and return an input record. So how do I name this method? I think even C has this problem, e.g. fopen function does open a file and return a handler. But with Objective C convention it seems difficult to name the method. From apple document for cocoa name convention and also from this article cocoa with love They both said " If a method performs an