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How do I time a method's execution in Java?
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What is copy-on-write?
...tenance of instant snapshot on database servers like Microsoft SQL Server 2005. Instant snapshots preserve a static view of a database by storing a pre-modification copy of data when underlaying data are updated. Instant snapshots are used for testing uses or moment-dependent reports and should not ...
Is returning null bad design? [closed]
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206
The rationale behind not returning null is that you do not have to check for it and hence your ...
How does a PreparedStatement avoid or prevent SQL injection?
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What is the difference between a directory and a folder?
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edited Jun 20 at 9:12
Community♦
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answered Feb 22 '11 at 13:33
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Split column at delimiter in data frame [duplicate]
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105
@Taesung Shin is right, but then just some more magic to make it into a data.frame.
I added a "...
Changing the selected option of an HTML Select element
...n').onclick = function() {
var opts = sel.options;
for (var opt, j = 0; opt = opts[j]; j++) {
if (opt.value == val) {
sel.selectedIndex = j;
break;
}
}
}
<select id="sel">
<option>Cat</option>
<option>Dog</option>
<op...
Rollback to an old Git commit in a public repo
... [revision] .
where [revision] is the commit hash (for example: 12345678901234567890123456789012345678ab).
Don't forget the . at the end, very important. This will apply changes to the whole tree. You should execute this command in the git project root. If you are in any sub directory, then this...
Is UML practical? [closed]
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edited Sep 7 '19 at 4:08
community wiki
3 r...
Django - How to rename a model field using South?
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edited Dec 9 '15 at 10:48
Bruno A.
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answered Jul 13 '10 at...