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Test if remote TCP port is open from a shell script
...ing with 0 on success, 1 on failure.
For a quick interactive check (with a 5 seconds timeout):
nc -z -v -w5 <host> <port>
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How to reset sequence in postgres and fill id column with new data?
... script.
– tahagh
Nov 28 '13 at 13:15
5
SELECT setval('seq', 1, FALSE) should do the same (here, ...
How to get the path of the batch script in Windows?
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577
%~dp0 will be the directory. Here's some documentation on all of the path modifiers. Fun stuff...
How do I iterate through table rows and cells in JavaScript?
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315
If you want to go through each row(<tr>), knowing/identifying the row(<tr>), and ite...
Installing older version of R package
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155
To install an older version of a package from source (within R):
packageurl <- "http://cran...
How can I mask a UIImageView?
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165
There's an easier way.
#import <QuartzCore/QuartzCore.h>
// remember to include Framework...
Can I add jars to maven 2 build classpath without installing them?
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605
Problems of popular approaches
Most of the answers you'll find around the internet will suggest ...
How to replace multiple substrings of a string?
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edited May 22 '19 at 9:55
Majid Ali Khan
44155 silver badges1212 bronze badges
answered May 24 '11 at...
Easiest way to toggle 2 classes in jQuery
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518
If your element exposes class A from the start, you can write:
$(element).toggleClass("A B");...
Hide text using css
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435
This is one way:
h1 {
text-indent: -9999px; /* sends the text off-screen */...