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Rails: Using build with a has_one association in rails
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The build m>me m>thod signature is different for has_one and has_many associations.
class User < ActiveRecord::Base
has_one :profile
has_many :m>me m>ssages
end
The build syntax for has_many association:
user.m>me m>ssages.build
The bui...
Replace a value if null or undefined in JavaScript
I have a requirem>me m>nt to apply the ?? C# operator to JavaScript and I don't know how.
Consider this in C#:
5 Answers
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Find the IP address of the client in an SSH session
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Check if there is an environm>me m>nt variable called:
$SSH_CLIENT
OR
$SSH_CONNECTION
(or any other environm>me m>nt variables) which gets set when the user logs in. Then process it using the user login script.
Extract the IP:
$ echo $SSH_CLIENT | awk '{...
How to get current tim>me m> and date in C++?
Is there a cross-platform way to get the current date and tim>me m> in C++?
24 Answers
24
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How do I set environm>me m>nt variables from Java?
How do I set environm>me m>nt variables from Java? I see that I can do this for subprocesses using ProcessBuilder . I have several subprocesses to start, though, so I'd rather modify the current process's environm>me m>nt and let the subprocesses inherit it.
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Compiling C++11 with g++
...ing to update my C++ compiler to C++11.
I have searched a bit and I have com>me m> to the conclusion that I have to use the flag -std=c++0x or -std=gnu++0x , but I don't know many things about flags. Can anyone help m>me m>? (I'm using Ubuntu 12.04.)
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How to copy data to clipboard in C#
...can I copy a string (e.g "hello") to the System Clipboard in C#, so next tim>me m> I press CTRL+V I'll get "hello"?
5 Answers
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Inherit docstrings in Python class inheritance
I'm trying to do som>me m> class inheritance in Python. I'd like each class and inherited class to have good docstrings. So I think for the inherited class, I'd like it to:
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Have a fixed position div that needs to scroll if content overflows
...ed Oct 28 '18 at 16:00
Matilda Sm>me m>ds
85688 silver badges1616 bronze badges
answered Aug 21 '13 at 20:01
stride...
extract part of a string using bash/cut/split
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To extract joebloggs from this string in bash using param>me m>ter expansion without any extra processes...
MYVAR="/var/cpanel/users/joebloggs:DNS9=domain.com"
NAm>ME m>=${MYVAR%:*} # retain the part before the colon
NAm>ME m>=${NAm>ME m>##*/} # retain the part after the last slash
echo $NAm>ME m>
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