Object.keys(a)// [] 可以依靠Object.keys()这个方法通过判断它的长度来知道它是否为空 if (Object.keys(object).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 或者写在一个函数中 functioncheckNullObj(obj) { returnObject.keys(obj).lengt...
"use strict"; Object.defineProperty(exports, "__esModule", { value: true }); var tslib_1 = require("tslib"); var digits = new Map([ [0, "zero"], [1, "one"], [2, "two"], [3, "three"], [4, "four"], [5, "five"], [6, "six"], [7, "seven"], [8, "eight"...
虽然很简单,就是个for循环,if判断。。 但也可能会有同学表示晕啊,看不懂。 看不明白不要紧,我大概讲下,具体怎么比较的。。 首先我们看这个函数,它接收一个数组做为参数, 那传入之后, 在这个函数中的arr就是一个数组,对它使用join方法, 将这个数组转为一个字符串,并用逗号分隔。 然后呢,声明一个变量b,把...
functionisType(obj){vartype =Object.prototype.toString.call(obj);if(type == '[object Array]'){return'Array'; }elseif(type == '[object Object]'){return"Object"}else{return'param is no object type'; } } console.log(isType(o));//Objectconsole.log(isType(a));//Array //下面是更简...
This patch uses a new checkIfCollectable() utility to terminate the test early once we detect that any of the target object can actually be garbage collected. This should lower the chance of false positives. As a drive-by this also allows us to use setImmediate() to grow the ...
"java.lang.reflect.AccessibleObject","java.net.InetAddress","java.net.DatagramSocket","java.net.DatagramSocket","java.net.Socket","java.net.ServerSocket","java.net.MulticastSocket","java.net.MulticastSocket","java.net.URL","java.net.HttpURLConnection","java.security.AccessControlContext",// ...
name {String} bucket name If bucket is not empty, will throw BucketNotEmptyError. If bucket is not exists, will throw NoSuchBucketError. [options] {Object} optional parameters [timeout] {Number} the operation timeout Success will return:res {Object} response info, including status {Number...
You have to set renderer.debug.checkShaderErrors to true to restore the previous behavior. Object3D.applyMatrix() now updates the local matrix if Object3D.matrixAutoUpdate is set to true.r102 → r103The npm script npm run editor was removed. The editor is now a Progressive Web App (PWA)...
if (proto === null) return; for (const protoKey of EnumerateObjectProperties(proto)) { if (!visited.has(protoKey)) yield protoKey; } } 可以看到,其首要的工作就是迭代遍历对象及原型链上的可枚举属性从而收集所有的可枚举k...
The Mapbox GL JSaddLayermethod adds a Mapbox style layer to the map's style. The only required parameter foraddLayeris a Mapbox style layer object. It also accepts an optionalbeforeparameter, which is the ID of an existing layer to insert the new layer before. If you omit this argument...