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Reverse / invert a dictionary mapping
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For Python 2.7.x
inv_map = {v: k for k, v in my_map.iteritems()}
For Python 3+:
inv_map = {v: k for k, v in my_map.items()}
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json_encode() escaping forward slashes
...e it?
Yes, you only need to use the JSON_UNESCAPED_SLASHES flag.
!important read before: https://stackoverflow.com/a/10210367/367456 (know what you're dealing with - know your enemy)
json_encode($str, JSON_UNESCAPED_SLASHES);
If you don't have PHP 5.4 at hand, pick one of the many existing...
Is Javascript compiled or an interpreted language? [closed]
Can Javascript be called a pure interpreted language? Or does it also have some compiled flavor to it? Could someone guide at the reasons behind both the things whichever being true.
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What is the closest thing Windows has to fork()?
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Cygwin has fully featured fork() on Windows. Thus if using Cygwin is acceptable for you, then the problem is solved in the case performance is not an issue.
Otherwise you can take a look at how Cygwin implements fork(). From a quite old Cygwin's archi...
How do you specify command line arguments in Xcode 4?
...since it just went gold master. I need to specify a command line argument for testing my application.
2 Answers
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ActionController::InvalidAuthenticityToken
Below is an error, caused by a form in my Rails application:
24 Answers
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Combining multiple git repositories
...e's a solution I gave here:
First do a complete backup of your phd directory: I don't want to be held responsible for your losing years of hard work! ;-)
$ cp -r phd phd-backup
Move the content of phd/code to phd/code/code, and fix the history so that it looks like it has always been there (thi...
Vim: Creating parent directories on save
...d BufWritePre * if expand("<afile>")!~#'^\w\+:/' && !isdirectory(expand("%:h")) | execute "silent! !mkdir -p ".shellescape(expand('%:h'), 1) | redraw! | endif
augroup END
Note the conditions: expand("<afile>")!~#'^\w\+:/' will prevent vim from creating directories for files lik...
Java's L number (long) specification
...nteger's range) it will complain that 6000000000 is not an integer. To correct this, I had to specify 6000000000L . I just learned about this specification.
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How to run mvim (MacVim) from Terminal?
I have MacVim installed and I am trying to set it up as the editor for Git (version control), but I can't run 'mvim' from the command line as it isn't recognised. How do I setup mvim so I can run it from Terminal?
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