The slice() Method The substr() Method The substring() Method Syntax string.split(separator,limit) Parameters ParameterDescription separatorOptional. A string or regular expression to use for splitting. If omit
1.为了方便链式调用,我们可以给Array原型添加自定义的方法来扩充数组功能 Function.prototype.method=function(name,func){ this.prototype[name]=func; return this; }; 2.利用可读写的length可以完成数组添加,删除操作 比如push() 向数组的末尾添加元素 var poemlo=["1","2","3"]; pomelo.push("4");//[...
The slice() method returns a new array containing a portion of the original array, without modifying it. By using a loop and a variable to keep track of the starting index, we can slice the array into chunks of any size we want. For example, if we want to split an array of 12 ...
The array returned by this method contains each substring of this string that is terminated by another substring that matches the given expression or is terminated by the end of the string. The substrings in the array are in the order in which they occur in this string. If the expression d...
七、forEach对Array对象的每个元素调用指定函数。此函数是静态的,可在不创建对象实例的情况下调用。 参数: method:要对数组中每个元素调用的函数。 vararry3=[12,34,4,56,23,9]; arry3.forEach(function(v,i,t){//v代表值,i索引,t当前thisconsole.log(v); ...
This method does not change the existing arrays, but returns a new array, containing the values of the joined arrays. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 console.log(a.concat(b)); 当字符串处理 代码语言:javascript 代码运行次数:0 ...
JavaScript Array unshift() ❮ Previous JavaScript Array Reference Next ❯ Example Add new elements to an array: const fruits = ["Banana", "Orange", "Apple", "Mango"]; fruits.unshift("Lemon","Pineapple"); Try it Yourself » Description The unshift() method adds new elements to ...
//Method1constcreateArr= (n) =>Array.from(newArray(n),(v, i) =>i)constarr =createArr(100) //Method2constcreateArr= (n) =>newArray(n).fill(0).map((v, i) =>i)createArr(100) 22、随机排列数组 当有一个数组并且需要打乱其顺序时。
The split() method divides a string into a list of substrings and returns them as an array. Example const message = "JavaScript::is::fun"; // divides the message string at :: let result = message.split("::"); console.log(result); // Output: [ 'JavaScript', 'is', 'fun' ] ...
JavaScript String split() A string can be converted to an array with thesplit()method: Example text.split(",")// Split on commas text.split(" ")// Split on spaces text.split("|")// Split on pipe Try it Yourself » If the separator is omitted, the returned array will contain the...