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What is the pythonic way to avoid default parameters that are empty lists?
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Existing answers have already provided the direct solutions as asked for. However, since this is a very common pitfall for new Python programmers, it worth to add the explanation why python behaves this way, which is nicely summarized in "the Hitchhikers Guid...
PostgreSQL: insert from another table
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Just supply literal values in the SELECT:
INSERT INTO TABLE1 (id, col_1, col_2, col_3)
SELECT id, 'data1', 'data2', 'data3'
FROM TABLE2
WHERE col_a = 'something';
A select list can contain any value expression:
But the expressions in the select list do not have to reference any co...
Where can I find and submit bug reports on Google's Chrome browser?
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Mostly end-users file bugs through there. If you have technical details and a reproduction of the bug, file it through crbug.com/new (which is equivalent to the accepted answer).
– Paul Irish
Jan 6 '15 a...
Difference Between ViewResult() and ActionResult()
...ntResult - Writes content to the response stream without requiring a view
FileContentResult - Returns a file to the client
FileStreamResult - Returns a file to the client, which is provided by a Stream
FilePathResult - Returns a file to the client
Resources
What's the difference between ActionR...
Git: fatal: Pathspec is in submodule
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I have .git and see it! But when I want to commit some files that located in a folder, it shows an error "blahblah did not match any file(s) known to git"
– Dr.jacky
Oct 8 '16 at 7:26
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Hiding textarea resize handle in Safari
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You can override the resize behaviour with CSS:
textarea
{
resize: none;
}
or just simply
<textarea style="resize: none;">TEXT TEXT TEXT</textarea>
Valid properties are: both, horizontal, vertical, none
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Resizing an Image without losing any quality [closed]
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Method 'System.Drawing.Image.Save(string filename, ImageFormat format)' saves JPGs with quality 75. The image was blurry and not acceptable by the client. What fixed the quality issue was to use Save(string filename, ImageCodecInfo encoder, EncoderParameters encoder...
What do helper and helper_method do?
...pplication_controller.rb
def current_user
@current_user ||= User.find_by_id!(session[:user_id])
end
helper_method :current_user
the helper method on the other hand, is for importing an entire helper to the views provided by the controller (and it's inherited controllers). What this means is doin...
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
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is is identity testing, == is equality testing. what happens in your code would be emulated in the interpreter like this:
>>> a = 'pub'
>>> b = ''.join(['p', 'u', 'b'])
>>> a == b
True
>>> a is ...
JSLint is suddenly reporting: Use the function form of “use strict”
...all of your code in an IIFE to only have to specify "use strict"; once per file.
– bdukes
Sep 25 '15 at 14:12
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