function goodEmptyCheck(value) { Object.keys(value).length === 0&& value.constructor === Object; // ??? constructor check} goodEmptyCheck(new String()); // false ✅goodEmptyCheck(new Number()); // false ✅goodEmptyCheck(new Boolean()); // false ✅goodEmptyCheck(new Array());...
functioncheckNullObj(obj){if(Object.keys(obj).length===0){returnfalse// 如果为空,返回false}returntrue// 如果不为空,则会执行到这一步,返回true} 但这样写,还是太累赘了。可以写成这样: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 functioncheckNullObj(obj){returnObject.keys(obj).length==...
判断一个对象是否为空对象,本文给出三种判断方法:1.最常见的思路,for...in...遍历属性,为真则为“非空数组”;否则为“空数组” 2.通过JSON自带的.stringify方法来判断: 3...ES6新增的方法Object.keys():
Object empty Checker functionisEmptyObject(obj) {returnObject.keys(obj).length===0; }constobj = {};isEmptyObject(obj);// trueconstobj2 = {year:2023};isEmptyObject(obj2);// false constobj = {};consttrueType =Object.prototype.toString.apply(obj).replace(/\[object /i,``).replace(/\...
// the {LoadFieldByIndex} operator. The map check is only necessary when // TurboFan cannot prove that there is no observable side effect between // the {JSForInNext} and the {JSLoadProperty} node. // // Also not...
JSObject::kMaxUncheckedFastElementsLength); if (index < capacity) { *new_capacity = capacity; return false; } if (index - capacity >= JSObject::kMaxGap) return true; *new_capacity = JSObject::NewElementsCapacity(index + 1); DCHECK_LT(index, *new_capacity); ...
git config --global user.name userName git config --global user.email userEmail 分支8 标签46 dependabot[bot]Bump prismjs from 1.29.0 to 1.30.0 (#272)7491e865天前 522 次提交 .github/workflows bump checkout and setup-node actions versions ...
nameCache (default: null)— pass an empty object {} or a previously used nameCache object if you wish to cache mangled variable and property names across multiple invocations of minify(). Note: this is a read/write property. minify() will read the name cache state of this object and upd...
var object= {foo:"a", "bar":100, "foobar":true}; Enumerable.from(object).forEach(function(obj) { console.log(obj.key+ ":" +obj.value) });///Continue and break when iteratingconsole.log('\n# Continue and break when iterating\n');Enumerable.repeat("foo", 10).forEach(function...
js 判断一个 object 对象是否为空转载原文判断一个对象是否为空对象,本文给出三种判断方法: 1.最常见的思路,for...in...遍历属性,为真则为“非空数组”;否则为“空数组” for (var i in obj) { // 如果不为空,则会执行到这一步,返回true return tru...