下面是一个使用for循环来检查字符串的方法: functioncontainsString(arr,str){for(leti=0;i<arr.length;i++){if(arr[i]===str){returntrue;}}returnfalse;}letcolors=['red','green','blue'];console.log(containsString(colors,'green'));// trueconsole.log(containsString(colors,'yellow'));// fa...
log("The string '" + str + "' contains only letters!"); } 这种方法能够行得通,但不够简洁,JavaScript 1.6 中引入了一个泛型化的简写形式: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 if (Array.every(str, isLetter)) { console.log("The string '" + str + "' contains only ...
objArray.shift()---移去数组的第一个元素,并返回这个元素的值。这个方法的性质和pop方法很类似,pop方法是移去最后一个元素。 objArray.slice(start,end)--- 返回数组对象的一个子集,索引从start开始(包括 start),到end结束(不包括end),原有数组不受影响。如:[1,2,3,4,5,6].slice(1,4)将得到[2,3...
* @param array * @returns {ArrayBuffer|Blob|Array.<T>|string}*/functiondiff(target,array) {varresult =target.slice();for(vari = 0;i < result.length;i++) {for(varj = 0; j < array.length;j++) {if(result[i] ===array[j]) { result.splice(i,1); i--;break; } } }returnres...
一、当相同元素为String时 方法一 /** * List去重 */ private List<String> remo...
alert(arr.in_array("a")) 2.JS判断数组是否包含指定元素方法定义: Array.prototype.contains =function(obj) {vari =this.length;while(i--) {if(this[i] ===obj) {returntrue; } }returnfalse; } 或 Array.prototype.contains=function(element) {for(vari = 0; i <this.length; i++) {if(this...
* contains * * @param mixed input * @param string value * @return bol */ function contains(input, value) { if (!is_array(input)) { if (input.indexOf(value) != -1) { return true; } } else { var i = input.length; while (i–) { if (input[i] === value) { return true...
Complete Array Reference For a complete Array reference, go to our: Complete JavaScript Array Reference. The reference contains descriptions and examples of all Array properties and methods. Track your progress - it's free! Log inSign Up
function threeChars(value, index, str) { // Create a string that contains the previous, current, // and next character. return str.substring(index - 1, index + 2); } // Create a string. var word = "Thursday"; // Apply the map method to the string. // Each array element in ...
The JavaScript methodtoString()converts an array to a string of (comma separated) array values. Example constfruits = ["Banana","Orange","Apple","Mango"]; document.getElementById("demo").innerHTML= fruits.toString(); Result: Banana,Orange,Apple,Mango ...