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How do I create an abstract base class in JavaScript?
...t=function(name){
this.name=name;
}
Animal.prototype.say=function(){
alert(this.name + " who is a " + this.type + " says " + this.whattosay);
}
Animal.prototype.type="unknown";
function Cat(name) {
this.init(name);
//Make a cat somewhat unique
var s="";
for (var i=Math.ceil(M...
What is the opposite of evt.preventDefault();
...e) {
e.preventDefault();
var $this = $(this);
$.ajax('/path/to/script.php',
{
type: "POST",
data: { value: $("#input_control").val() }
}).done(function(response) {
$this.unbind('submit').submit();
});
});
...
Add new value to an existing array in JavaScript [duplicate]
...ay
// ---
arr = []; // empty array
// ---
arr = new Array(3);
alert(arr.length); // 3
alert(arr[0]); // undefined
// ---
arr = [3];
alert(arr.length); // 1
alert(arr[0]); // 3
Pushing to the array:
arr = [3]; // arr == [3]
arr[1] = 4; // arr == [3, 4]
arr[2] = 5; // arr...
How to get the selected radio button’s value?
...ios[i].checked) {
// do whatever you want with the checked radio
alert(radios[i].value);
// only one radio can be logically checked, don't check the rest
break;
}
}
<label for="gender">Gender: </label>
<input type="radio" name="genderS" value="1" checked="c...
Hidden Features of JavaScript? [closed]
...t I'll take just one for you, always use === and !== instead of == and !=
alert('' == '0'); //false
alert(0 == ''); // true
alert(0 =='0'); // true
== is not transitive. If you use === it would give false for
all of these statements as expected.
...
jQuery callback for multiple ajax calls
...estsCompleted({
numRequest: 3,
singleCallback: function(){
alert( "I'm the callback");
}
});
//usage in request
$.ajax({
url: '/echo/html/',
success: function(data) {
requestCallback.requestComplete(true);
}
});
$.ajax({
url: '/echo/html/',
success: f...
Declaring abstract method in TypeScript
... abstract makeSound(input : string) : string;
move(meters) {
alert(this.name + " moved " + meters + "m.");
}
}
class Snake extends Animal {
constructor(name: string) { super(name); }
makeSound(input : string) : string {
return "sssss"+input;
}
move() {
...
Permutations in JavaScript?
... + this.filter('fastest').map('name'));
})
.run({async: true});
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.4/lodash.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/platform/1.3.4/platform.min.js"></script>
<script src=...
Get the first key name of a javascript object [duplicate]
Let's assume we have the following javascript object:
8 Answers
8
...
Get value of a string after last slash in JavaScript
...
var str = "foo/bar/test.html";
var lastSlash = str.lastIndexOf("/");
alert(str.substring(lastSlash+1));
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