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Check if an array is empty or exists
...ypeof array.length; // => "number"
Case Empty Array
Now since we tested all other possibilities, we're talking to an instance of Array. In order to make sure it's not empty, we ask about number of elements it's holding, and making sure it has more than zero elements.
firstArr...
Deploy a project using Git push
...cess to the file (again, on the server):
chmod +x .git/hooks/post-update
Now, just locally push to your web server and it should automatically update the working copy:
git push production
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How to expand/collapse a diff sections in Vimdiff?
...ansion/only diffs with 3 context lines above or below, etc.). I currently know only the following commands :
4 Answers
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Django-DB-Migrations: cannot ALTER TABLE because it has pending trigger events
...en create the schema migration:
manage.py schemamigration fooapp --auto
Now you have two transactions and the migration in two steps should work.
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How to tell Xcode where my info.plist and .pch files are
I renamed my project and it's files and now Xcode is still looking for the old info.plist file. Where do I set the locations of the .plist and .pch files that it needs.
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What's the difference between and , and ?
...phones
"Bold" is a style - when you say "bold a word", people basically know that
it means to add more, let's say "ink", around the letters until they stand out
more amongst the rest of the letters.
That, unfortunately, means nothing to a blind person. On mobile phones
and other PDAs, text is a...
Set Django IntegerField by choices=… name
...n the admin! I have tested that the value really changes! What should I do now?
– Mahdi
Dec 13 '13 at 18:59
This is th...
How to delete an item in a list if it exists?
... in iterable if item] if the first argument is None); in Python 3.x, it is now equivalent to (item for item in iterable if function(item)). The subtle difference is that filter used to return a list, now it works like a generator expression - this is OK if you are only iterating over the cleaned lis...
Is there a way to get the git root directory in one command?
...n alias:
git config --global alias.root 'rev-parse --show-toplevel'
and now git root will function just as hg root.
Note: In a submodule this will display the root directory of the submodule and not the parent repository. If you are using Git >=2.13 or above, there is a way that submodules ...
jQuery Get Selected Option From Dropdown
... Ah, okay, you've updated your question with HTML. This answer is now irrelevant. As a matter of fact, .val() should work in your case-- you must have an error elsewhere.
– Elliot Bonneville
May 18 '12 at 20:17
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