once the default value of the parameter is set, the parameter forms a separate context when the function is declared to initialize. When initialization is complete, the scope disappears. This syntax behavior is not an extension of the function when th...
Hello everyone, I have a requirement now. Now, for example, I have a class. There are no specified functions in the class. The effect I need to do is object.fun ( kwargs) or objcet.func_path.func ( kwargs) . object is my instantiated object, and then ...
I am a rookie. I have a doubt about the following code. The code is as follows: function showPrimes(n) { nextPrime: for (let i = 2; i < n; iPP) { for (let j = 2; j < i; jPP) { if (i % j == 0) continue nextPrime...
Today, we look at the problems encountered in the authoritative Guide to javascript, which describes that there is a subtle difference between functions and "executable object (callable object) " in Javascript. All functions are executable, but an obje...
assume that the original data id type time 1 1 201X-XX-XX XX:XX 21 201X-XX-XX XX:XX 3 1 201X-XX-XX XX:XX 4 2 201X-XX-XX XX:XX 52 201X-XX-XX XX:XX query statement Select t.typepart. TimeMAX (t.id), t.* FROM t WHERE t.time between 2018-08-01 ...
question: the ajax request initiated within a function will get a code, so as a b function, how to get the return value (code) of a function? The b function is triggered by other events. ...
Code written by colleagues function tableVue(tableData){ var tableData = tableData; * vue * var tableV = new Vue({ el: -sharptable , data: { item:[] }, mounted: function () { ...
ask for an explanation because I learned es6, directly at the beginning. Es6, has always been in the class way of ES6, and function has not been used much. ...
I want to put multiple independent if statements in a function; such as: function(){ if(){ return true if }else{ return false if }; if(){ }else{ }; if(){ }else{ }; }; if the ...
Let me ask you a question. has made a new wodpress theme by myself. What code can I add to functions to load the previously installed wordpress plug-in into my new theme? ...
hypothetical function number($id){ .... sizeof($array); } <?= number(id);?> when number is complete, there will be a value how can I write to my function so that it will be printed ...
export default class Base extends Component<Props> { constructor(props) { super(props); console.log("Base this",this) this showToast renderModal } * *Toast * * showToast=(msg)=>{ cons...
first of all, let s talk about my problem. I m currently building a project using webpack + typescript to define a class: NetData. requirements are as follows: there is a frequently used function: (netdata: NetData) = > void . I wrote an alias u...
suppose I generate a value on some if faces $name if(xxx==xxx){ if(xxx==xxx){ if(xxx==xxx){ $name = xxx; } } } I want to add $name to the outside of if to use so what should I do?! ...
I write curl on a function like this: function httpRequest ($api, $data_string) { $ch = curl_init($api); curl_setopt($ch, CURLOPT_POST, 1); curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); curl_setopt($ch, CURLOPT_POSTFIELDS, $data_st...
there is a strange question suppose I declare $self = $_SERVER[ PHP_SELF ]; then I wrote a function below $self = $_SERVER[ PHP_SELF ]; function report(){ echo $self; } and then I ll do another one report(); he will say Undefined vari...
here I abstract the actual business I try to create a class that has the following methods: import types class A: def __init__(self,num): self.num = num self.add_prop(10) -sharp 10 def add_prop(self, n): f...
< H2 > question < H2 > storm applications built through maven work well in ide. Error occurred when submitting local storm services after packaging when pom s scop is configured with provided, storm error message is after package submission. F...
the leader requires that if you use node as the middle layer, request the backend api,node layer to use the koa2 (2.5.1) framework to provide an interface to the browser, but it is normal to return some dead data as a test when the backend development i...
does the, CASE WHEN THEN statement have to be used with the select statement in SQL server? declare @i int set @i=100 case @i when 100 then print 100 when 200 then print 200 else print 300 end the above statement reported an error ...
can you think of a page of Mini Program as a single-page application of vue? So multiple pages are multiple single-page applications, or is it that a Mini Program is just a single-page application, and multiple pages in it are routing pages? ...
problem description now it s an ajax cross-domain request. The json string format is returned at the background, but I don t have the background code. Ajax always enters error, but the error status codes returned are 4 and 200. I hope the gods can h...