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Rails :include vs. :joins
... that requires it. In some cases, you know the join will be more efficient and will not incur the risk of duplication.
– Jonathan Swartz
Nov 21 '13 at 0:28
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How can I check if a key exists in a dictionary? [duplicate]
...y:
# do something
Associative arrays are called dictionaries in Python and you can learn more about them in the stdtypes documentation.
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Navigation Drawer (Google+ vs. YouTube)
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Edit #3:
The Navigation Drawer pattern is officially described in the Android documentation!
Check out the following links:
Design docs can be found here.
Developer docs can be found here.
Edit #2:
Roman Nurik (an Android design engineer at Google) has confirmed that the recommended be...
How to get the list of files in a directory in a shell script?
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The other answers on here are great and answer your question, but this is the top google result for "bash get list of files in directory", (which I was looking for to save a list of files) so I thought I would post an answer to that problem:
ls $search_path &g...
copying all contents of folder to another folder using batch file?
... Hello Hussain, I have tried xcopy /s c:\Folder1 d:\Folder2 command in batch file, but it does't work for me. can you please guide me more.
– SCM
Jan 5 '11 at 6:57
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What’s the best way to check if a file exists in C++? (cross platform)
... platform) , but I'm wondering if there is a better way to do this using standard c++ libs? Preferably without trying to open the file at all.
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How to make a flat list out of list of lists?
...for item in sublist]
As evidence, you can use the timeit module in the standard library:
$ python -mtimeit -s'l=[[1,2,3],[4,5,6], [7], [8,9]]*99' '[item for sublist in l for item in sublist]'
10000 loops, best of 3: 143 usec per loop
$ python -mtimeit -s'l=[[1,2,3],[4,5,6], [7], [8,9]]*99' 'sum(l...
Regex: Remove lines containing “help”, etc
I have a long document of commands. Using Notepad++ or regex, I want to delete all lines containing "help" including keyboard_help, etc.
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Can't install RMagick 2.13.1. Can't find MagickWand.h.
...://superuser.com/questions/361435/i-have-compiled-imagemagick-on-my-centos-and-rmagick-wont-install
I exported the imagemagick path by adding
$ export PKG_CONFIG_PATH="/opt/local/lib/pkgconfig:$PKG_CONFIG_PATH"
to my ~/.bash_profile, sourcing the new profile, then running:
gem install rmagick
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Issue with adding common code as git submodule: “already exists in the index”
I'm new to git and would appreciate help with adding submodules.
I've received two projects sharing some common code. The shared code was just copied into the two projects. I created a separate git repo for the common code and removed it from the projects with the plan to add it as a git submodule...