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Rails: Using build with a has_one association in rails
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The build method signature is different for has_one and has_many associations.
class User < ActiveRecord::Base
has_one :profile
has_many :messages
end
The build syntax for has_many association:
user.messages.build
The build syntax for has_one association:
user.bu...
What does “#pragma comment” mean?
...atures. For example, (I believe) Microsoft started the "#pragma once" deal and it was only in MS products, now I'm not so sure.
Pragma Directives It includes "#pragma comment" in the table you'll see.
HTH
I suspect GCC, for example, has their own set of #pragma's.
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Python mock multiple return values
I am using pythons mock.patch and would like to change the return value for each call.
Here is the caveat:
the function being patched has no inputs, so I can not change the return value based on the input.
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iOS Equivalent For Android Shared Preferences
I am porting an Android app to iOS, one thing I used was the Shared Preferences in Android to save each time a level was complete.
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What's the difference between subprocess Popen and call (how can I use them)?
I want to call an external program from Python. I have used both Popen() and call() to do that.
2 Answers
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Creating an empty bitmap and drawing though canvas in Android
I'd like to create an empty bitmap and set a canvas to that bitmap and then draw any shape on the bitmap.
2 Answers
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Executing an EXE file using a PowerShell script
... trying to execute an EXE file using a PowerShell script. If I use the command line it works without a problem (first I supply the name of the executable and series of parameters to invoke it):
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Insert a line break in mailto body
I would like to insert a line break into my mailto body.
I tried %0A, %0D and %0D%0A. Nothing worked for me.
I tested on Gmail, Yahoo, Apple Mail, Outlook 2010, Outlook.com and Thunderbird with Google Chrome on Mac OSX.
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JavaScript regex multiline flag doesn't work
...d news is that you can work around it by using a character class (e.g. \s) and its negation (\S) together, like this:
[\s\S]
So in your case the regex would become:
/<div class="box-content-5">[\s\S]*<h1>([^<]+?)<\/h1>/i
As of ES2018, JavaScript supports the s (dotAll) f...
How to git clone a specific tag
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Note if the ref is ambiguous and you have a branch and a tag named the same thing, this will prefer the branch.
– Keith Smiley
Feb 21 '18 at 22:18
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