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Check Whether a User Exists
...so, if you turn this snippet into a function or script, I suggest you also set your exit code appropriately:
#!/bin/bash
user_exists(){ id "$1" &>/dev/null; } # silent, it just sets the exit code
if user_exists "$1"; code=$?; then # use the function, save the code
echo 'user found'
else
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Can I invoke an instance method on a Ruby module without including it?
...f bar
Mods.foo
end
end
Thing.new.bar
However, I'm curious why a set of unrelated functions are all contained within the same module in the first place?
Edited to show that includes still work if public :foo is called after module_function :foo
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How to join strings in Elixir?
How do I join two strings in a list with a space, like:
9 Answers
9
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How to use comments in Handlebar templates?
... answered May 27 '13 at 8:19
jptsetungjptsetung
8,42833 gold badges3737 silver badges4949 bronze badges
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How to slice an array in Bash
... editor after snippets, if snippets enabled
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How to use sed to replace only the first occurrence in a file?
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This prints #include "newfile.h", we need to escape the quotes. Then we set the done variable to 1, so we don't add more includes.
1;
This means "print out the line" - an empty action defaults to print $0, which prints out the whole line. A one liner and easier to understand than sed IMO :-)
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【App Inventor 2 数据可视化】使用柱状图和饼图收集数据 - App应用开发 - ...
...和图形来理解数据?所有的数据都留在App中，直到你按下Reset按钮。在本系列中，你可以查看以下指南，了解如何将数据发送到在线电子表格以便与群组共享。先决条件：能够自如的进行 App Inventor 组件设计和逻辑设计。如果你使...
Can someone explain collection_select to me in clear, simple terms?
...# this is name of method that will be called for every row, result will be set as key
:name_with_initial, # this is name of method that will be called for every row, result will be set as value
# as a result, every option will be generated by the following rule:
# <option value=#{au...
dyld: Library not loaded … Reason: Image not found
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@Himanshu I have libcppreset for my project! it has a lot of dependency from boost and ... I run a bash script to change them with install_name_tool but for the LC_ID_DYLIB I can't so need to make a symlink in usr/loca/opt ! is there any way to figur...
Try-catch speeding up my code?
...are CLR exception frames dealt with in terms of registers and stack? Could setting one up have freed a register up for use somehow?
– Random832
Jan 19 '12 at 18:34
4
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