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What do you call the -> operator in Ruby?
..."Methods, Procs, Lambdas, and Closures"), a lambda defined using -> is called lambda literal.
succ = ->(x){ x+1 }
succ.call(2)
The code is equivalent to the following one.
succ = lambda { |x| x + 1 }
succ.call(2)
Informally, I have heard it being called stabby lambda or stabby literal....
How to concatenate string variables in Bash
...he habit of putting $foo inside the double quotes, for the times when it really does matter.
– Cascabel
Nov 15 '10 at 7:56
109
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Determine file creation date in Java
...low ( How to get creation date of a file in Java ), but the answer isn't really there as the OP had a different need that could be solved via other mechanisms. I am trying to create a list of the files in a directory that can be sorted by age, hence the need for the file creation date.
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No submodule mapping found in .gitmodule for a path that's not a submodule
...odule mapping found in .gitmodules for path" error message.
You can check all the entries in the index which are referencing submodules:
git ls-files --stage | grep 160000
Previous answer (November 2010)
It is possible that you haven't declared your initial submodule correctly (i.e. without a...
How to disable textarea resizing?
I need to disable textarea horizontal resize. Sometimes I want to allow vertical resize on the textarea.
5 Answers
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Get environment variable value in Dockerfile
... Very nice solution! On a Mac you can get envsubst as part of brew install gettext. But because of possible conflicts with the BSD build system it is "keg-only" and no symlnks are made. However, it is safe to do ln -s /usr/local/Cellar/gettext/*/bin/envsubst /usr/local/bin/ to add that one comma...
How do I redirect output to a variable in shell? [duplicate]
...ptures the output of a command, but it does not use a redirect. If you actually need to use a redirect because of a more complex need, See my answer. Google brought you here, right? Why go somewhere else to find the answer you searched for?
– Bruno Bronosky
Aug...
What are the differences between ipython and bpython?
...g.
Run functions in the background in a separate task with %bg.
A whole parallel programming environment (not really a feature you expect from an interactive Python shell, but IPython offers it).
This list could be nearly arbitrarily continued. And of course there will be lots of features in bpyt...
How do I use Nant/Ant naming patterns?
...is implicitly ./bar.txt (. means the current directory). So that list is really ./bar.txt, ./src/bar.c, etc. and the ./ is assumed.
– benzado
Sep 29 '16 at 15:28
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how to use sed, awk, or gawk to print only what is matched?
...use -E sed option to trigger modern RE format. Check re_format(7), specifically last paragraph of DESCRIPTION developer.apple.com/library/mac/#documentation/Darwin/Reference/…
– anddam
Mar 3 '13 at 16:33
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