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What are all the common ways to read a file in Ruby?
.../path", "r") do |f|
f.each_line do |line|
puts line
end
end
# File is closed automatically at end of block
It is also possible to explicitly close file after as above (pass a block to open closes it for you):
f = File.open("my/file/path", "r")
f.each_line do |line|
puts line
end
f.close...
How to make a cross-module variable?
The __debug__ variable is handy in part because it affects every module. If I want to create another variable that works the same way, how would I do it?
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Create folder with batch but only if it doesn't already exist
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You just use this: if not exist "C:\VTS\" mkdir C:\VTS it wll create a directory only if the folder does not exist.
Note that this existence test will return true only if VTS exists and is a directory. If it is not there, or is there as a...
Finding the index of an item in a list
Given a list ["foo", "bar", "baz"] and an item in the list "bar" , how do I get its index ( 1 ) in Python?
31 Answers
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Best way to organize jQuery/JavaScript code (2013) [closed]
This answer has been answered before but are old and not up to date. I have over 2000 lines of code in a single file, and as we all know this is bad practice, especially when i'm looking through code or adding new features. I want to better organize my code, for now and for the future.
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Running multiple commands with xargs
...e of "$arg" instead of % (and the absence of -I in the xargs command line) is for security reasons: Passing data on sh's command-line argument list instead of substituting it into code prevents content that data might contain (such as $(rm -rf ~), to take a particularly malicious example) from being...
Really killing a process in Windows
...l up the task manager and hit the "End Process" button for it. However, this doesn't always work; if I try it enough times then it'll usually die eventually, but I'd really like to be able to just kill it immediately. On Linux I could just kill -9 to guarantee that a process will die.
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Convert tabs to spaces in Notepad++
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To convert existing tabs to spaces, press Edit->Blank Operations->TAB to Space.
If in the future you want to enter spaces instead of tab when you press tab key:
Go to Settings->Preferences...->Language (since version 7.1) o...
Make sure only a single instance of a program is running
Is there a Pythonic way to have only one instance of a program running?
20 Answers
20...
Strings as Primary Keys in SQL Database [closed]
...m not very familiar with databases and the theories behind how they work. Is it any slower from a performance standpoint (inserting/updating/querying) to use Strings for Primary Keys than integers?
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