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...
problem description I use the method of lazy loading components in vue.js. I can t find the components after being packaged with webpack. Does webpack need to be configured? the environmental background of the problems and what methods you have tri...
the VUE architecture project, the shopping cart in the project, allows the user to call the interface when clicking to add or decrease, pass the value to the background, and update the shopping cart. but encountered the following problem: if the user c...
in terms of online tutorials (for example: http: www.php.cn php-weiziji.) use header ( Content-Length: 200 ); you can give it a length and stop receiving when it exceeds it, but after I tried, I found that the browser will still download all the con...
<a class="glyphicon glyphicon-chevron-down" id="row">< a> $("-sharprow").click(function(){ $(this).toggleClass( glyphicon glyphicon-chevron-up ); }) Why can t I change the direction of the arrow? ...
I drag the folder containing the Xcode project onto OmniGraffle, and the following dialog box pops up automatically ...