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Does Python support short-circuiting?
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>>> def fun(i):
... print "executed"
... return i
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One can observe the Python's short-circuiting behavior of and, or operators in the following example:
>>> fun(1)
executed
1
>>> 1 or fun(1) # due to short-circuiting "executed" not printed
1
>>>...
Why should I avoid multiple inheritance in C++?
... inheritance (abbreviated as MI) smells, which means that usually, it was done for bad reasons, and it will blow back in the face of the maintainer.
Summary
Consider composition of features, instead of inheritance
Be wary of the Diamond of Dread
Consider inheritance of multiple interfaces instead o...
Integer division: How do you produce a double?
... you can as well do double d = (double) num / denom;... (OK, this one depends on precedence)
– user85421
Jun 30 '10 at 12:25
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Adding external library in Android studio
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How can one do this WITHOUT copying? The library is used by other non-Android projects and is routinely updated. If it copies the source, then changes to the original will not be seen. Isn't that kind of stupid?
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JavaScript code to stop form submission
One way to stop form submission is to return false from your JavaScript function.
12 Answers
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How to make gradient background in android
...look by using an xml Layer-List to combine the top and bottom 'bands' into one file. Each band is an xml shape.
See this previous answer on SO for a detailed tutorial: Multi-gradient shapes.
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How to write very long string that conforms with PEP8 and prevent E501
...newline character. It's not possible to put a line end comment after it if one should be necessary. It is possible to do this with concatenated string constants:
s = ("this is my really, really, really, really, really, really, " # comments ok
"really long string that I'd like to shorten.")
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jQuery trigger file input
...restriction is only when the <input type="file"/> is set to display:none; or is visbilty:hidden.
So i tried positioning it outside the viewport by setting position:absolute and top:-100px; and voilà it works.
see http://jsfiddle.net/DSARd/1/
call it a hack.
Hope that works for you.
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Two way/reverse map [duplicate]
...se additions, but it'd be helpful to delete old key pairs when setting new ones (d['foo'] = 'baz' would need to additionally remove the bar key).
– beardc
Jan 29 '13 at 19:10
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Calculate the date yesterday in JavaScript
... previous answer and added an arrow function
// a (not very efficient) oneliner
let yesterday = new Date(new Date().setDate(new Date().getDate()-1));
console.log(yesterday);
// a function call
yesterday = ( function(){this.setDate(this.getDate()-1); return this} )
.call(new Date);
c...