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How to get the unique ID of an object which overrides hashCode()?
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Uniqueness isn't guaranteed at all ... for a practical JVM implementation. Guaranteed uniqueness requires either no relocation / compaction by the GC, or a big and expensive data structure for managing the hashcode values of live objects.
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What is the difference between $(command) and `command` in shell programming?
... for portability issues it is recommended to use backticks for non-nested calls. $(...) needs a recursive parser but this was not used with ksh86 that introduced the feature. Check in-ulm.de/~mascheck/various/cmd-subst for a list of correct implementations. A conforming shell needs to support all c...
Using DISTINCT and COUNT together in a MySQL Query
...ted the answer as it is close to become a great answer and it was syntactically incorrect.
– Rahul Tripathi
Sep 8 '14 at 10:20
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Make fill entire screen?
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It seems that all it takes is html { height: 100%; } actually.
– Ry-♦
Apr 20 '11 at 0:47
30
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How can I sort arrays and data in PHP?
...ue is lower and a value higher than 0 if the first value is higher. That's all that's needed:
function cmp(array $a, array $b) {
if ($a['foo'] < $b['foo']) {
return -1;
} else if ($a['foo'] > $b['foo']) {
return 1;
} else {
return 0;
}
}
Often, you will...
How to stretch the background image to fill a div
...gt;
Equivalent of CSS3 background-size: cover; :
To achieve this dynamically, you would have to use the opposite of contain method alternative (see below) and if you need to center the cropped image, you would need a JavaScript to do that dynamically - e.g. using jQuery:
$('.selector img').each(...
How to set initial value and auto increment in MySQL?
... autoincrement number.
Don't forget to hit "Apply" when you are done with all changes.
PhpMyAdmin:
If you are using phpMyAdmin, you can click on the table in the lefthand navigation, go to the tab "Operations" and under Table Options change the AUTO_INCREMENT value and click OK.
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Find all storage devices attached to a Linux machine [closed]
I have a need to find all of the writable storage devices attached to a given machine, whether or not they are mounted.
7...
Firebug-like debugger for Google Chrome
...ntrospection, I can do it with Firebug. Now with IE8's new developer mode, all the major browsers have builtin dev modes. Good times.
– guns
Apr 27 '09 at 9:32
1
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How to quit android application programmatically
I Found some codes for quit an Android application programatically. By calling any one of the following code in onDestroy() will it quit application entirely?
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