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Ways to implement data versioning in MongoDB
Can you share your thoughts how would you implement data versioning in MongoDB. (I've asked similar question regarding Cassandra . If you have any thoughts which db is better for that please share)
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git checkout tag, git pull fails in branch
... 'git branch --set-upstream-to=origin/master master my_branch' worked for me
– Blue Clouds
Jul 9 '18 at 11:25
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`find -name` pattern that matches multiple patterns
...ist of all python and html files in a directory with the command find Documents -name "*.{py,html}" .
12 Answers
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How to find out the MySQL root password
... the password field in mysql.user table field was removed, now the field name is 'authentication_string'.
Quit the mysql safe mode and start mysql service by:
mysqladmin shutdown
sudo service mysql start
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What are the new documentation commands available in Xcode 5? [closed]
One of Xcode 5's new features is the ability to document your own code with a special comment syntax. The format is similar to doxygen, but appears to only support a subset of those features .
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Multiple cases in switch statement
Is there a way to fall through multiple case statements without stating case value: repeatedly?
18 Answers
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How to add an extra column to a NumPy array
...d timings:
In [23]: N = 10
In [24]: a = np.random.rand(N,N)
In [25]: %timeit b = np.hstack((a,np.zeros((a.shape[0],1))))
10000 loops, best of 3: 19.6 us per loop
In [27]: %timeit b = np.zeros((a.shape[0],a.shape[1]+1)); b[:,:-1] = a
100000 loops, best of 3: 5.62 us per loop
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How to have git log show filenames like svn log -v
SVN's log has a "-v" mode that outputs filenames of files changed in each commit, like so:
11 Answers
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XMLHttpRequest status 0 (responseText is empty)
... html file containing the script is opened in the browser via the file scheme. Make sure to place the files in your server (apache or tomcat whatever) and then open it via http protocol in the browser. (i.e. http://localhost/myfile.html) This is the solution.
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How to check if a specific key is present in a hash or not?
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Hash's key? method tells you whether a given key is present or not.
session.key?("user")
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