思考一个问题:为什么箭头函数的this指向要设计成和普通函数不一样? --为了取代var self = this; 或.bind(this),以一种更便捷和巧妙的方式来从外部函数继承this In other words, arrow functions treat this like any other lexical variable. 翻译:换句话说,箭头函数对待this就像对待任何其他词法变量一样 If you...
function_asyncToGenerator(fn) {returnfunction() {vargen = fn.apply(this, arguments);returnnewPromise(function(resolve, reject) {functionstep(key, arg) {try{varinfo = gen[key](arg);varvalue = info.value; }catch(error) { reject(error);return; }if(info.done) { resolve(value); }else{re...
原文:https://dev.to/bhagatparwinder/arrow-function-basics-34cm 简介 箭头函数是在 ES6 引入的,相对于函数表达式来说是一种更简洁的方式。 箭头函数名称的来源是因为使用了=>。 语法 代码语言:javascript 代码运行次数:0 运行 AI代码解释 constfunctionName=(arg1,arg2,...argN)=>{returnvalue;} ...
(`ES6 Arrow Function this =`, this); } ES5Function = function () { log(`ES5 Function this`, this); } ES5NormalFunction() { log(`ES5 Normal Function this`, this); } // static static StaticFunction() { log(`StaticFunction this`, this); } get getArgs() { log(`this.args`, ...
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Re-use same _this UID for every scope, instead of creating a new one each time - _this, _this2 etc. It's not necessary for each var to have a different name, as only one this can be in scope anywhe...
js in depth: arrow function & prototype & this & constructor 1. proptotype bug const log = console.log; // 1. constructor bug const func = () => { = `xgqfrms`; title = `arrow function`; log(``, ); }; log(`\nfunc`, func); ...
"The function evaluation requires all threads to run" while accessing music library through wmp.dll "The left-hand side of an assignment must be a variable, property or indexer". Help? "The remote server returned an error: (401) Unauthorized" "Typewriter" like effect in a C# Console appl...
In my SQL server management studio I do not have NT\SQLSERVERAGENT service and in the log file I have this error: [298] SQLServer Error: 15247, User does not have permission to perform this action. [SQLSTATE 42000] (DisableAgentXPs) [298] SQLServer Error: 229, The EXECUTE permission wa...
In the other thread, we discussed that this is ONLY useful for DISPLAY of those fields and values in a query, and not to be used to create a non-standard kind of table that will end up making life more difficult. It would help to provide you some more detailed help if you can provi...