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Why is address zero used for the null pointer?
..., because it means freeing the pointer again isn't dangerous; when I call malloc it returns a pointer with the value zero if it can't get me memory; I use if (p != 0) all the time to make sure passed pointers are valid, etc.
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Dictionary vs Object - which is more efficient and why?
...e, you are incurring additional overhead because of e.g. additional memory allocations and code execution (e.g. of the __init__ method).
In your code, if o is an Obj instance, o.attr is equivalent to o.__dict__['attr'] with a small amount of extra overhead.
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How to auto-remove trailing whitespace in Eclipse?
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This option appears in PDT for PHP as well, under Save Actions.
– thaddeusmt
Feb 28 '11 at 5:50
1
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Convert object string to JSON
...a'] }"
JSON.parse(invalidJSON)
//Result: Uncaught SyntaxError: Unexpected token h VM1058:2
JSON.parse(JSONize(invalidJSON))
//Result: Object {hello: "world", foo: 1, bar: "2", foo1: 1, _bar: 2…}
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Google Maps V3 - How to calculate the zoom level for a given bounds
...LOBE_WIDTH = 256; // a constant in Google's map projection
var west = <?php echo $minLng; ?>;
var east = <?php echo $maxLng; ?>;
*var north = <?php echo $maxLat; ?>;*
*var south = <?php echo $minLat; ?>;*
var angle = east - west;
if (angle < 0) {
angle += 360;
}
*var a...
How to change collation of database, table, column?
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You can run a php script.
<?php
$con = mysql_connect('localhost','user','password');
if(!$con) { echo "Cannot connect to the database ";die();}
mysql_select_db('db...
How to get Locale from its String representation in Java?
...," + l.getCountry();
}
public Locale stringToLocale(String s) {
StringTokenizer tempStringTokenizer = new StringTokenizer(s,",");
if(tempStringTokenizer.hasMoreTokens())
String l = tempStringTokenizer.nextElement();
if(tempStringTokenizer.hasMoreTokens())
String c = tempStringTo...
counting number of directories in a specific directory
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Nice! How would you do this $ ls -l .vim with PHP? Or how to get only the total, without the list. I mean, in this case get only 52?
– Pathros
Mar 8 '17 at 18:32
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Diff Algorithm? [closed]
.... There's a huge difference in output when you are diffing by character or token (word).
Good luck!
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How to construct a WebSocket URI relative to the page URI?
...an also be used for other purposes by the websocket server such as passing tokens (e.g. via query params), etc.
– kanaka
Apr 11 '17 at 20:54
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