Describe the bug Anytime I attempt to run a vite+react application in production mode with crypto polyfilled, the application fails to render and displays the following error in the browser js console: Uncaught TypeError: e._reverse is n...
6.2.2直接使用sort()方法,传入一个判断的匿名函数进行倒序排列 arr.sort(function(p,n){ return n-p; // 降序 // return p-n; // 升序 }); 7.数组的反转 var array=[ 3 , 2 , 1 , 4 , 5 ]; var newArr=array.reverse();//得到5,4,1,2,3 8. 数组转字符串 var array=[ 1 , 2 ,...
firstNameCaps(); // TypeError on line 1: s.firstNameCaps is not a function Person.prototype.firstNameCaps = function() { return this.first.toUpperCase() } s.firstNameCaps(); // SIMON 有趣的是,你还可以给 JavaScript 的内置函数原型(prototype)添加东西。让我们给 String 添加一个方法用来返回...
hoisted();// logs "foo"functionhoisted(){console.log('foo');} 函数表达式 当使用表达式创建函数时,称为函数表达式。如: notHoisted();// TypeError: notHoisted is not a functionvarnotHoisted =function(){console.log('bar');}; Js隐式转换介绍...
function reverseSort(values){ if (typeof values.sort == "function"){ // 绝对不要这样!!! values.sort(); values.reverse(); } } 在这个例子中,代码首先检测了参数中是否存在 sort() 方法。这样,如果传入一个包含 sort() 方法的对象(而不是数组)当然也会通过检测,但在调用 reverse() 函数时可能就...
constcompose=(...fns)=>value=>fns.reverse().reduce((acc,fn)=>fn(acc),value)constdocumentWrite=document.write.bind(document)constcreateNode=function(text){return'<h1>'+text+'</h1>'}constsetText=msg=>msgconstprintMessage=compose(documentWrite,createNode,setText)printMessage('hi~ godkun') ...
function LengthDemo() { var a, l; a = new Array(0,1,2,3,4); l = a.length; return(l);//l==5 } (3)reverse函数:将数组元素顺序颠倒。例: 程序代码 function ReverseDemo() { var a, l; a = new Array(0,1,2,3,4);
In contexts where a method is to be invoked on a primitive string or a property lookup occurs, JavaScript will automatically wrap the string primitive and call the method or perform the property lookup. 参考资料:MDN:String 10. 再一次的字符串陷阱 function showCase(value) { switch(value) { ...
isNeg ? "-" : "") + reverseStr(result); } var hexToChar = new Array('0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'); function digitToHex(n) { var mask = 0xf; var result = ""; for (i = 0; i < 4; ++...
function compose(...fns) { return fns.reverse().reduce( function reducer(fn1,fn2){ return function composed(...args){ return fn2( fn1( ...args ) ); }; } ); } // ES6 箭头函数形式写法 var compose = (...fns) => fns.reverse().reduce( (fn1,fn2) => (...args) => fn2( ...