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Compare JavaScript Array of Objects to Get Min / Max
...ength;i++) {
val = cmp(val, arr[i][attr])
}
return val;
}
alert(finder(Math.max, myArray, "Cost"));
alert(finder(Math.min, myArray, "Cost"));
or if you had a deeply nested structure, you could get a little more functional and do the following:
var myArray =
[
{"ID": 1, "Cost...
HTML5 LocalStorage: Checking if a key exists [duplicate]
...' work too with if(typeof(localStorage.getItem("username"))===null){ alert('no') };
– Gabriel
Apr 15 '13 at 8:42
...
Python's json module, converts int dictionary keys to strings
...ect properties are converted to String.
var a= {1: 'a'};
for (k in a)
alert(typeof k); // 'string'
This can lead to some curious-seeming behaviours:
a[999999999999999999999]= 'a'; // this even works on Array
alert(a[1000000000000000000000]); // 'a'
alert(a['999999999999999999999']); // fail
...
Accessing JSON object keys having spaces [duplicate]
...ion.
var test = {
"id": "109",
"No. of interfaces": "4"
}
alert(test["No. of interfaces"]);
For more info read out here:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Working_with_Objects
...
What is function overloading and overriding in php?
...user function and a method:
/// Function Overriding ///
function a(){
alert('a');
}
a=function(){
alert('b');
}
a(); // shows popup with 'b'
/// Method Overriding ///
var a={
"a":function(){
alert('a');
}
}
a.a=function(){
alert('b');
}
a.a(); // shows popup with 'b'
...
When is null or undefined used in JavaScript? [duplicate]
...s scenarios:
You declare a variable with var but never set it.
var foo;
alert(foo); //undefined.
You attempt to access a property on an object you've never set.
var foo = {};
alert(foo.bar); //undefined
You attempt to access an argument that was never provided.
function myFunction (foo) {
...
Get an array of list element contents in jQuery
...
And in clean javascript:
var texts = [], lis = document.getElementsByTagName("li");
for(var i=0, im=lis.length; im>i; i++)
texts.push(lis[i].firstChild.nodeValue);
alert(texts);
...
How to change current Theme at runtime in Android [duplicate]
...t*/
String choose[] = {"Theme_Holo_Light","Theme_Black"};
AlertDialog.Builder b = new AlertDialog.Builder(this);
/** Setting a title for the window */
b.setTitle("Choose your Application Theme");
/** Setting items to the alert dialog */
b.setSingleC...
What does immutable mean?
...ou instantiate the object, you can't change its properties. In your first alert you aren't changing foo. You're creating a new string. This is why in your second alert it will show "foo" instead of oo.
Does it mean, when calling methods on
a string, it will return the modified
string, but...
Make a number a percentage
...o need for anything fancy:
var number1 = 4.954848;
var number2 = 5.9797;
alert(Math.floor((number1 / number2) * 100)); //w00t!
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