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Why does `True == False is False` evaluate to False? [duplicate]
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From the docs:
x < y <= z is equivalent to x < y and y <= z, except that y is
evaluated only once (but in both cases z is not evaluated at all when
x < y is found to be false).
In your case True == Fa...
Adding a new SQL column with a default value
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Try this:
ALTER TABLE table1 ADD COLUMN foo INT DEFAULT 0;
From the documentation that you linked to:
ALTER [ONLINE | OFFLINE] [IGNORE] TABLE tbl_name
alter_specification [, alter_specification] ...
alter_specification:
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ADD [COLUMN] (col_name column_definition,...)
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Are Duplicate HTTP Response Headers acceptable?
...Thank you for your quick response, Simon! But doesn't the quoted paragraph from RFC 2616 apply to Cache-Control as well? Am I missing something?
– Su Zhang
Dec 6 '10 at 22:38
1
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What does 'var that = this;' mean in JavaScript?
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From Crockford
By convention, we make a private that
variable. This is used to make the
object available to the private
methods. This is a workaround for an
error in the ECMAScript Language
Specification which c...
What is the purpose of the Visual Studio Hosting Process?
... The hosting process tends to keep DLLs loaded that I want to write to from another running copy of Visual Studio. Killing the hosting process, or even exiting and restarting the offending VS, does not help, because the newly started hosting process loads the DLL again. This is the reason why I ...
Visual Studio 2010 - C++ project - remove *.sdf file
...u can safely delete the .sdf file and ipch folder but you can also stop VS from putting those files in the project folder in the first place. (Useful if you have your source in an SVN or other synchronised folder, or if you store your project on a small volume like a USB stick or SSD and you don't w...
Auto-fit TextView for Android
...didn't remove the getMaxLines() and used your own. it will still work only from API16... please change it so that everyone could use it. i suggest to override setMaxLines to store the parameter to a field and then access the field instead of using getMaxLines.
– android develop...
Loop through an array in JavaScript
...(item))
Keep in mind if you are iterating an array to build another array from it, you should use map, I've seen this anti-pattern so many times.
Anti-pattern:
const numbers = [1,2,3,4,5], doubled = [];
numbers.forEach((n, i) => { doubled[i] = n * 2 });
Proper use case of map:
const number...
Android: How to handle right to left swipe gestures
I want my app to recognize when a user swipes from right to left on the phone screen.
21 Answers
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Using ECMAScript 6
... very close to the desired result.
If you want to run ES6 syntax directly from the console, then you could try to overwrite the JavaScript evaluator of the console (such that Traceur preprocesor is run before executing the code). If you fancy doing this, have a look at this answer to learn how to m...