This question already has an answer here: How do you check if a variable is an array in JavaScript? [duplicate] 24 answers Check if object is array? 38 answers In pure JavaScript you can use the following cross browser approach: if (Object.prototype.toString.call(x) === "[object Array]") { // is plain array } jQuery has special method for that: if ($.isArray(x)) { // is plain a
这个问题在这里已经有了答案： 你如何检查一个变量是否是JavaScript中的数组？ [复制] 24个答案 检查对象是否是数组？ 38个答案 在纯JavaScript中，您可以使用以下跨浏览器方法： if (Object.prototype.toString.call(x) === "[object Array]") { // is plain array } jQuery有特殊的方法： if ($.isArray(x)) { // is plain array } 你可以使用instanceof 。 以下是一些FireBug测试： test1 = new Object(
Using ng-repeat I am creating bunch of forms with values in it. With each form there is also button to add rows to that particular form with new fields. Code is below HTML: <form name="{{form.name}}" ng-repeat="form in forms"> <h2>{{form.name}}</h2> <div ng-repeat="cont in form.contacts"> <input type="text" class="xdTextBox" ng-model="
使用ng-repeat我创建了一堆带有值的表单。 每个表单都有一个按钮，可以将新行添加到特定表单中。 代码如下 HTML： <form name="{{form.name}}" ng-repeat="form in forms"> <h2>{{form.name}}</h2> <div ng-repeat="cont in form.contacts"> <input type="text" class="xdTextBox" ng-model="cont.ac"/> <input type="text" class="xdTextBox" ng
I have a very strange problem in jQuery/CSS an I'm not sure what's is going wrong here. Consider this minimal example: #list li { color:#3c6174; cursor:pointer; } #list li.active { color:red; } <ul id="list"> <li class="active"></li> <li></li> <li></li> </ul> $buttons = $("#list li"); $buttons.click(function() {
我在jQuery / CSS中遇到了一个非常奇怪的问题，我不确定这里出了什么问题。 考虑这个最简单的例子： #list li { color:#3c6174; cursor:pointer; } #list li.active { color:red; } <ul id="list"> <li class="active"></li> <li></li> <li></li> </ul> $buttons = $("#list li"); $buttons.click(function() { $buttons.removeClass("active"
My angular controller may generate the messages, that I intent to translate using angular-translations. In controller I currently assign a variable to translation key , such as: $scope.info = "core.projectconfig.created"; where that key has its translation specified as core.projectconfig.created <=> 'Project {{projectName}} created successfully' As you can see, I also need to su
我的角度控制器可能会生成消息，我打算使用角度平移进行翻译。 在控制器中，我现在将一个变量分配给翻译键 ，例如： $scope.info = "core.projectconfig.created"; 该密钥的翻译指定为 core.projectconfig.created <=> 'Project {{projectName}} created successfully' 正如你所看到的，我还需要在翻译中替代projectName。 在我看来，我尝试过这样的事情 <P translate="{{info}}", translate-values="{p
I have been reading online and some places say it isn't possible, some say it is and then give an example and others refute the example, etc. How do I declare a 2 dimensional array in JavaScript? (assuming it's possible) How would I access its members? ( myArray[0][1] or myArray[0,1] ?) var items = [ [1, 2], [3, 4], [5, 6] ]; console.log(items[0][0]); // 1 console.l
我一直在网上阅读，有些地方说这是不可能的，有些人说这是，然后举一个例子，其他人反驳这个例子，等等。 我如何在JavaScript中声明2维数组？ （假设它是可能的） 我将如何访问其成员？ （ myArray[0][1]或myArray[0,1] ？） var items = [ [1, 2], [3, 4], [5, 6] ]; console.log(items[0][0]); // 1 console.log(items);您只需将数组中的每个项目都设置为一个数组。 var x = new Array(10); for (var i
I was wondering how I'd go about implementing a method in javascript that removes all elements of an array that clear a certain condition. (Preferably without using jQuery) Ex. ar = [ 1, 2, 3, 4 ]; ar.removeIf( function(item, idx) { return item > 3; }); The above would go through each item in the array and remove all those that return true for the condition (in the example, item &
我想知道如何去实现一个方法在JavaScript中，删除清除一定条件的数组的所有元素。 （最好不使用jQuery） 防爆。 ar = [ 1, 2, 3, 4 ]; ar.removeIf( function(item, idx) { return item > 3; }); 上面的代码会遍历数组中的每个项目，并删除所有那些return true的条件（例如，项目> 3）。 我刚刚开始使用JavaScript，并想知道是否有人知道一个简短有效的方法来完成这项工作。 - 更新 - 如果条件也可以用于对
This question already has an answer here: Get all unique values in an array (remove duplicates) 57 answers 使用jQuery快速和肮脏： var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"]; var uniqueNames = []; $.each(names, function(i, el){ if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el); }); "Smart" but naïve way uniqueArray = a.filter(function(item, pos) {
这个问题在这里已经有了答案： 获取数组中的所有唯一值（删除重复项）57个答案 使用jQuery快速和肮脏： var names = ["Mike","Matt","Nancy","Adam","Jenny","Nancy","Carl"]; var uniqueNames = []; $.each(names, function(i, el){ if($.inArray(el, uniqueNames) === -1) uniqueNames.push(el); }); “聪明”但天真的方式 uniqueArray = a.filter(function(item, pos) { return a.indexOf(item) == pos; }) 基本
Is there a method to remove an item from a JavaScript array? Given an array: var ary = ['three', 'seven', 'eleven']; I would like to do something like: removeItem('seven', ary); I've looked into splice() but that only removes by the position number, whereas I need something to remove an item by its value. This can be a global function or a method of a custom object, if you aren't
有没有方法从JavaScript数组中删除项目？ 给定一个数组： var ary = ['three', 'seven', 'eleven']; 我想做一些事情： removeItem('seven', ary); 我研究过splice()但是它只能删除位置号码，而我需要通过它的值删除某个项目。 如果您不允许将其添加到本机原型，则这可以是全局函数或自定义对象的方法。 它从数组中删除与任何参数匹配的所有项目。 Array.prototype.remove = function() { var what, a = arguments,
I have the following array. var arr = [1,0,2]; I would like to remove the last element ie 2. I used arr.slice(-1); but it doesn't remove the value. 使用拼接（索引，howmany） arr.splice(-1,1) let fruit = ['apple', 'orange', 'banana', 'tomato']; let popped = fruit.pop(); console.log(popped); // "tomato" console.log(fruit); // ["apple", "orange", "banana"] MDN上Array.prototype.pop的文档
我有以下数组。 var arr = [1,0,2]; 我想删除最后一个元素，即2。 我用了arr.slice(-1); 但它不会删除该值。 使用拼接（索引，howmany） arr.splice(-1,1) let fruit = ['apple', 'orange', 'banana', 'tomato']; let popped = fruit.pop(); console.log(popped); // "tomato" console.log(fruit); // ["apple", "orange", "banana"] MDN上Array.prototype.pop的文档 你可以使用.slice()方法来做到这一点，如： arr.slic
How to remove first and last element in an array? For example: var fruits = ["Banana", "Orange", "Apple", "Mango"]; Expected output array: ["Orange", "Apple"] fruits.shift(); // Removes the first element from an array and returns only that element. fruits.pop(); // Removes the last element from an array and returns only that element. 查看Array的所有方法。 Creates a 1 level deep copy.
如何删除数组中的第一个和最后一个元素？ 例如： var fruits = ["Banana", "Orange", "Apple", "Mango"]; 预期输出阵列： ["Orange", "Apple"] fruits.shift(); // Removes the first element from an array and returns only that element. fruits.pop(); // Removes the last element from an array and returns only that element. 查看Array的所有方法。 创建1级深度副本。 fruits.slice(1, -1) 放开原始数组。