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Convert string to Python class object?
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120
Warning: eval() can be used to execute arbitrary Python code. You should never use eval() wi...
Check if $_POST exists
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172
if( isset($_POST['fromPerson']) )
{
$fromPerson = '+from%3A'.$_POST['fromPerson'];
ech...
Argparse optional positional arguments?
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edited Jan 2 '17 at 8:30
anatoly techtonik
16.3k88 gold badges102102 silver badges124124 bronze badges
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How do I create a directory from within Emacs?
...ET dir/to/create RET
to create directories dir/parent1/node and dir/parent2/node, type:
M-! mkdir -p dir/parent{1,2}/node RET
It assumes that Emacs's inferior shell is bash/zsh or other compatible shell.
or in a Dired mode
+
It doesn't create nonexistent parent directories.
Example:
C-x d ...
Why is Double.MIN_VALUE in not negative
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182
The IEEE 754 format has one bit reserved for the sign and the remaining bits representing the ma...
How to convert ActiveRecord results into an array of hashes
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212
as_json
You should use as_json method which converts ActiveRecord objects to Ruby Hashes desp...
Is the “struct hack” technically undefined behavior?
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52
As the C FAQ says:
It's not clear if it's legal or portable, but it is rather popular.
and...
What is event bubbling and capturing?
... bubbling. Both are part of the W3C Document Object Model Events standard (2000).
IE < 9 uses only event bubbling, whereas IE9+ and all major browsers support both. On the other hand, the performance of event bubbling may be slightly lower for complex DOMs.
We can use the addEventListener(type,...
What is the difference between currying and partial application?
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260
Currying is converting a single function of n arguments into n functions with a single argumen...
How to get whole and decimal part of a number?
Given, say, 1.25 - how do I get "1" and ."25" parts of this number?
16 Answers
16
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