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JavaScript loop through json array?
...ate like this :
for (var key in json) {
if (json.hasOwnProperty(key)) {
alert(json[key].id);
alert(json[key].msg);
}
}
And it gives perfect result.
See the fiddle here : http://jsfiddle.net/zrSmp/
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jQuery, simple polling example
...
function doPoll(){
$.post('ajax/test.html', function(data) {
alert(data); // process results here
setTimeout(doPoll,5000);
});
}
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How should I call 3 functions in order to execute them one after the other?
...e this is equivalent to the following:
window.setTimeout(function() {
alert("!");
// set another timeout once the first completes
window.setTimeout(function() {
alert("!!");
}, 1000);
}, 3000); // longer, but first
Here's a general asynchronous looping function. It will ca...
For..In loops in JavaScript - key value pairs
...
for (var k in target){
if (target.hasOwnProperty(k)) {
alert("Key is " + k + ", value is " + target[k]);
}
}
hasOwnProperty is used to check if your target really has that property, rather than having inherited it from its prototype. A bit simpler would be:
for (var k in t...
change cursor to finger pointer
...nquirer's link. consider the following html:
<a id=test_link onclick="alert('kinda neat);">Click ME!</a>
When a user mouse's over this link, the pointer will not change to a hand...instead, the pointer will behave like it's hovering over normal text. One might not want this...and so...
What is this 'Lambda' everyone keeps speaking of?
... {
if (numbers[i] % 2 === 0) {
even.push(numbers[i]);
}
}
alert(even);
// Using the filter method
even = [1, 2, 3, 4].filter(function (number) {
return number % 2 === 0;
});
alert(even);
Code execution delay
In some environments, in which the concept of event is available, ...
image.onload event and browser cache
I want to create an alert box after an image is loaded, but if the image is saved in the browser cache, the .onload event will not be fired.
...
“Variable” variables in Javascript?
...ng eval():
var data = "testVariable";
eval("var temp_" + data + "=123;");
alert(temp_testVariable);
Or using the window object:
var data = "testVariable";
window["temp_" + data] = 123;
alert(window["temp_" + data]);
http://www.hiteshagrawal.com/javascript/dynamic-variables-in-javascript
...
How to append something to an array?
...ar ar1 = [1, 2, 3];
var ar2 = [4, 5, 6];
var ar3 = ar1.concat(ar2);
alert(ar1);
alert(ar2);
alert(ar3);
The concat does not affect ar1 and ar2 unless reassigned, for example:
var ar1 = [1, 2, 3];
var ar2 = [4, 5, 6];
ar1 = ar1.concat(ar2);
alert(ar1);
Lots of great i...
How to implement a confirmation (yes/no) DialogPreference?
...
That is a simple alert dialog, Federico gave you a site where you can look things up.
Here is a short example of how an alert dialog can be built.
new AlertDialog.Builder(this)
.setTitle("Title")
.setMessage("Do you really want to whatever?...