{ this.name = name || 'MyObject'; this.value=0; this.increment = function...function MyObject(name){ this.name = name || 'MyObject'; this.value = 0; this.increment = function...var i=0 for (i=0;i<=10;i++) { document.write("The number is " + i + "") } 参考推荐:...
functionisFunctionBodyEmpty(func) {if(typeoffunc !=='function') {returnfalse;// Not a function, so not considered empty}constfunctionString = func.toString().trim();// Regular expression to match different function formats and extract the bodyconstmatch = functionString.match(/^(async\s*)?
// is 是一个对象函数 伪代码res=>{if(is.object(res.data)&&is.string(res.data.name)&&is.number(res.data.age)){// TODO:}} 将过程抽象掉的行为也是一种函数式思想。上面代码,提高了复用性,将判断的过程抽象成了 is 的对象函数中,这样在其他地方都可以复用这个 is 。 但是,代码还是有问题,一般来...
function greet(name) { console.log(name); } greet(); // undefined 3. Accessing Non-Existing Object Properties If you attempt to access a property that doesn’t exist on an object, it will return undefined. This is an example of the code. const person = { name: "John" }; console....
应用类型:Object、Array和Function 类型判断 1.对 boolean 类型的判断总结 为false时:空字符串 '' 、undefined、0、NAN、null 为true时:除上述false的情况都为true 此判断会经常应用于判断一个变量是否有返回的if 语句中 varo ={'name':'lee'};vara = ['reg','blue'];functioncheckBoolean(a){if(a){ret...
if(str.match(reg)){ //包含; } 方法三: search()方法可在字符串内检索指定的值,或找到一个或多个正则表达式的匹配。 var str = "123" console.log(str.search("2") != -1); // true RegExp对象的方法search() 方法用于检索字符串中指定的子字符串,或检索与正则表达式相匹配的子字符串。如果没有...
function conditionallyStoreData(store,location,value,checkFn) { if (checkFn( value, store, location )) { store[location] = value; } } function notEmpty(val) { return val != ""; } function isUndefined(val) { return val === undefined; } function isPropUndefined(val,obj,prop) { ...
function* EnumerateObjectProperties(obj) { const visited = new Set(); for (const key of Reflect.ownKeys(obj)) { if (typeof key === 'symbol') continue; const desc = Reflect.getOwnPropertyDescriptor(obj, key); if (...
TypeError: Expecting a function in instanceof check, but got <Object> */ 二、ECMA5.1规范中[[HasInstance]] /* how [[HasInstance]] has been defined in the ECMA 5.1 specification: Assume F is a Function object. When the [[HasInstance]] internal method of F is called with value V, the ...
"new function");publicKeywordCheckUtils(){// 空构造方法}publicstaticvoidcheckInsecureKeyword(Stringcode)throwsException{Set<String>insecure=blacklist.stream().filter(s->StringUtils.containsIgnoreCase(code,s)).collect(Collectors.toSet());if(!CollectionUtils.isEmpty(insecure)){thrownewException("输入字符...