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Unix command to find lines common in two files
...nd which could print the common lines from two or more files, does anyone know its name? It was much simpler than diff .
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How to escape regular expression special characters using javascript? [duplicate]
... text.replace(/[-[\]{}()*+?.,\\^$|#\s]/g, '\\$&');
}
Update: There is now a proposal to standardize this method, possibly in ES2016: https://github.com/benjamingr/RegExp.escape
Update: The abovementioned proposal was rejected, so keep implementing this yourself if you need it.
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What does enumerate() mean?
...by Brett Slatkin and he shows another way to iterate over a list and also know the index of the current item in the list but he suggests that it is better not to use it and to use enumerate instead.
I know you asked what enumerate means, but when I understood the following, I also understood how en...
Class Not Found Exception when running JUnit test
...ame error happened again so I had to try this as well. It works fine again now, so to be safe you may want to do both of these things.
– Roger
Sep 22 '14 at 14:20
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Preventing console window from closing on Visual Studio C/C++ Console application
...SOLE) in SubSystem option or you can just type Console in the text field!
Now try it...it should work
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Adding a column to an existing table in a Rails migration
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@neeraj you probably have the answer by now but for other seekers, yes you can as in e.g. t.string :column_x, limit: 10, after: :column_y (for Rails 4 at least)
– 244an
May 15 '19 at 19:59
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Is there a way to use shell_exec without waiting for the command to complete?
...ve.
You can find the detailed explanation here: http://oytun.co/response-now-process-later
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How to hide 'Back' button on navigation bar on iPhone?
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Don't forget that we have the slide to back gesture now. You probably want to remove this as well. Don't forget to enable it back again if necessary.
if ([self.navigationItem respondsToSelector:@selector(hidesBackButton)]) {
self.navigationItem.hidesBackButton = YES;
}
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In Django, how do I check if a user is in a certain group?
...ming, there is one initial user
user.groups.add(group) # user is now in the "Editor" group
then user.groups.all() returns [<Group: Editor>].
Alternatively, and more directly, you can check if a a user is in a group by:
if django_user.groups.filter(name = groupname).exists():
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What can be the reasons of connection refused errors?
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@a'r How would you know the status of backlog?
– Naveen Verma
Jan 15 '19 at 12:31
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