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Make sure only a single instance of a program is running
...tendo import singleton
me = singleton.SingleInstance() # will sys.exit(-1) if other instance is running
The latest code version is available singleton.py. Please file bugs here.
You can install tend using one of the following methods:
easy_install tendo
pip install tendo
manually by getting it ...
How do I comment out a block of tags in XML?
...oid Studio, select the block, then Ctrl + Slash to comment it (or Ctrl + Shift + Slash).
– Kamran Bigdely
Jul 20 '16 at 22:33
1
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How to kill all processes matching a name?
...When -f is set, the full command line is used.
Which means, for example, if we see these lines in ps aux:
apache 24268 0.0 2.6 388152 27116 ? S Jun13 0:10 /usr/sbin/httpd
apache 24272 0.0 2.6 387944 27104 ? S Jun13 0:09 /usr/sbin/httpd
apache 24319 0.0 2.6 3878...
How to create a hex dump of file containing only the hex characters without spaces in bash?
How do I create an unmodified hex dump of a binary file in Linux using bash? The od and hexdump commands both insert spaces in the dump and this is not ideal.
...
JavaScript equivalent of jQuery's extend method
...e rest of the code within the function. In order to prevent having to specify all of the settings within the config object, I use jQuery's extend method to fill in a new object, settings with any default values from the default object if they weren't specified in the config object:
...
Breakpoints are crossed out, how can I make them valid?
... STS which I don't belive. What ever, I hope my post can help other users, if they got the same problem.
– MartinL
Nov 3 '11 at 10:17
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How to change MySQL column definition?
...
Do you mean altering the table after it has been created? If so you need to use alter table, in particular:
ALTER TABLE tablename MODIFY COLUMN new-column-definition
e.g.
ALTER TABLE test MODIFY COLUMN locationExpect VARCHAR(120);
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What is the difference between Xamarin.Form's LayoutOptions, especially Fill and Expand?
...alignment within its space.
Expand defines whether it occupies more space if available.
Theory
The structure LayoutOptions controls two distinct behaviors:
Alignment: How is the view aligned within the parent view?
Start: For vertical alignment the view is moved to the top. For horizontal ali...
C: Run a System Command and Get Output? [duplicate]
... /* Open the command for reading. */
fp = popen("/bin/ls /etc/", "r");
if (fp == NULL) {
printf("Failed to run command\n" );
exit(1);
}
/* Read the output a line at a time - output it. */
while (fgets(path, sizeof(path), fp) != NULL) {
printf("%s", path);
}
/* close */
...
Data structure: insert, remove, contains, get random element, all at O(1)
... I don't know of any hashtables that let you get an element like that, and if there are any, I can't imagine that this would be a constant time operation. I would be interested to be proven wrong on either count.
– guildner
Apr 16 '11 at 6:10
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