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How can I check whether a option already exist in select by JQuery
...it already exists:
$("#yourSelect option[value='yourValue']").length > 0;
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How to copy data to clipboard in C#
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Alexei Levenkov
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answered Aug 23 '10 at 8:59
Kieren JohnstoneKieren Johnstone
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Is there a Python caching library?
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edited Dec 14 '17 at 10:02
Iberê
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answered Se...
How do I pull files from remote without overwriting local files?
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edited Mar 19 '14 at 8:10
Amol Ghotankar
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answe...
What is tail recursion?
...sive version of the same function:
function tailrecsum(x, running_total = 0) {
if (x === 0) {
return running_total;
} else {
return tailrecsum(x - 1, running_total + x);
}
}
Here's the sequence of events that would occur if you called tailrecsum(5), (which would effect...
Format a date using the new date time API
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answered Apr 14 '14 at 20:10
James_DJames_D
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How to remove duplicate values from a multi-dimensional array in PHP
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answered Jun 3 '09 at 18:12
daveilersdaveilers
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Adding git branch on the Bash command prompt
...).
Option 1: use an existing copy on your filesystem. Example (Mac OS X 10.15):
$ find / -name 'git-prompt.sh' -type f -print -quit 2>/dev/null
/Library/Developer/CommandLineTools/usr/share/git-core/git-prompt.sh
Option 2: Pull the script from GitHub.
Next, add the following line to your .b...
What's the best way to retry an AJAX request on failure using jQuery?
... url : 'someurl',
type : 'POST',
data : ....,
tryCount : 0,
retryLimit : 3,
success : function(json) {
//do something
},
error : function(xhr, textStatus, errorThrown ) {
if (textStatus == 'timeout') {
this.tryCount++;
if (thi...
Can I set a breakpoint on 'memory access' in GDB?
...ad/write.
You can set read watchpoints on memory locations:
gdb$ rwatch *0xfeedface
Hardware read watchpoint 2: *0xfeedface
but one limitation applies to the rwatch and awatch commands; you can't use gdb variables
in expressions:
gdb$ rwatch $ebx+0xec1a04f
Expression cannot be implemented with ...