如果需要,findIndex()可以在下面的代码中使用该方法来查找匹配对象在数组中的索引。 <!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Javascript Find Object In Array By Property Value</title> </head> <body> <script> var sampleArray = [ {"id": 1, "animal": "Dog...
2. Object的keys()和values()还有entries()方法 let obj ={ name:"张三", sex:"男", age:20}for( let key of Object.keys(obj)){ console.log(key) }//name//sex//agefor( let val of Object.values(obj)){ console.log(val) }//张三//男//20for( let val of Object.entries(obj)){ co...
functioncopy2(obj){varre;if(obj.__proto__ ===Object.prototype ){ re={};for(varkeyinobj){ re[key]=copy2(obj[key]); } }elseif(obj.__proto__ ===Array.prototype){ re=Array(obj.length);for(vari = 0;i < re.length;i++){ re[i]=obj[i]; } }else{ re=obj; }returnre; }...
vararr=['a','s','d','f'];console.info(isInArray(arr,'a'));//循环的方式/** * 使用循环的方式判断一个元素是否存在于一个数组中 *@param{Object}arr 数组 *@param{Object}value 元素值 */functionisInArray(arr,value){for(vari=0;i<arr.length;i++){if(value===arr[i]){returntrue;}...
JSObject 构造函数 字段 方法 显式接口实现 JSParser JSPrototypeObject JSScanner JSToken JSVariableField LateBinding LenientArrayPrototype LenientBooleanPrototype LenientDateConstructor LenientDatePrototype LenientEnumeratorPrototype LenientErrorPrototype LenientFunctionPrototype ...
LenientObjectPrototype LenientRegExpPrototype LenientStringConstructor LenientStringPrototype LenientVBArrayPrototype MathObject MemberInfoInitializer MemberInfoList MethodInvoker Missing 命名空间 NoContextException NotRecommended NumberConstructor NumberObject NumberPrototype ...
It's much more safety when you assume that ids are random. And stop to use this function.// If you need to access all worksheets in a loop please look to the next example.constworksheet=workbook.getWorksheet(1);// access by `worksheets` array:workbook.worksheets[0];//the first one; ...
前言&介绍 Pomelo:一个快速、可扩展、Node.js分布式游戏服务器框架 从三四年前接触Node.js开始就接触到了Pomelo,从Pomelo最...
keys = object->GetCachedEnumKeysWithElements(); } } else { keys = object->GetEnumKeys(); } // For-In Body: for (size_t i = 0; i < keys->length(); i++) { // For-In Next: String* key = keys[i]; ...
"IS_FIND_INDEX","NO_HOLES","$create","res","isArray","original","META","setDesc","FREEZE","setMeta","w","fastKey","onFreeze","KEY","NEED","redefineAll","createArrayMethod","$has","arrayFind","arrayFindIndex","UncaughtFrozenStore","findUncaughtFrozen","entry","getConstructor",...