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What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
... // these are the same
b = new Array(), // a and b are arrays with length 0
c = ['foo', 'bar'], // these are the same
d = new Array('foo', 'bar'), // c and d are arrays with 2 strings
// these are different:
e = [3] // e.length == 1, e[0] == 3
...
Disabling of EditText in Android
In my application, I have an EditText that the user only has Read access not Write access.
25 Answers
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how to deal with google map inside of a hidden div (Updated picture)
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Just tested it myself and here's how I approached it. Pretty straight forward, let me know if you need any clarification
HTML
<div id="map_canvas" style="width:700px; height:500px; margin-left:80px;" ></div>
<button oncl...
How do I make an html link look like a button?
...ped by anchors, i.e. tags, but I don't want to have to fire up an image editor every time I change the text on a button.
2...
Get local IP address
....ToString();
}
}
throw new Exception("No network adapters with an IPv4 address in the system!");
}
To check if you're connected or not:
System.Net.NetworkInformation.NetworkInterface.GetIsNetworkAvailable();
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What is the difference between is_a and instanceof?
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Update
As of PHP 5.3.9, the functionality of is_a() has changed. The original answer below states that is_a() must accept an Object as the first argument, but PHP versions >= 5.3.9 now accept an optional third boolean argument $allow_string (defaults to false)...
Java Ordered Map
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The SortedMap interface (with the implementation TreeMap) should be your friend.
The interface has the methods:
keySet() which returns a set of the keys in ascending order
values() which returns a collection of all values in the ascending order of ...
What reason is there to use null instead of undefined in JavaScript?
I've been writing JavaScript for quite a long time now, and I have never had a reason to use null . It seems that undefined is always preferable and serves the same purpose programmatically. What are some practical reasons to use null instead of undefined ?
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Why the switch statement cannot be applied on strings?
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The reason why has to do with the type system. C/C++ doesn't really support strings as a type. It does support the idea of a constant char array but it doesn't really fully understand the notion of a string.
In order to generate the code for a sw...
*.h or *.hpp for your class definitions
I've always used a *.h file for my class definitions, but after reading some boost library code, I realised they all use *.hpp . I've always had an aversion to that file extension, I think mainly because I'm not used to it.
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