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How to select rows that have current day's timestamp?
...sert about 7k rows
('2013-02-08 20:01:12') ;
Lets try the 2 versions now.
Version 1 with DATE(timestamp) = ?
EXPLAIN
SELECT * FROM test
WHERE DATE(timestamp) = CURDATE() --- using DATE(timestamp)
ORDER BY timestamp ;
Explain:
ID SELECT_TYPE TABLE TYPE POSSIBLE_KEYS KEY...
Why does C++11's lambda require “mutable” keyword for capture-by-value, by default?
...ally transparent? g's supplier might have used mutable anyway. So I won't know. On the other hand, if the default is non-const, and people must add const instead of mutable to function objects, the compiler can actually enforce the const std::function<int(int)> part and now f can assume that g...
Static member initialization in a class template
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@Johannes: Dammit, I'm here for a year and I didn't know that! What else am I missing? (I still remember the shame when I discovered that the two numbers that appear when I click on the number of votes aren't a bug, but a feature.) <goes_playing> Wow, when I hover over yo...
What is Bit Masking?
...ou could first do the mask, then the shift. The results are the same, but now you would have to use a different mask:
uint32_t byte3 = (value & 0xff00) >> 8;
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How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?
...ke(0, 0, width, height), imageRef);
CGContextRelease(context);
// Now your rawData contains the image data in the RGBA8888 pixel format.
NSUInteger byteIndex = (bytesPerRow * y) + x * bytesPerPixel;
for (int i = 0 ; i < count ; ++i)
{
CGFloat alpha = ((CGFloat) rawDat...
How do you check if a variable is an array in JavaScript? [duplicate]
...ork as variable instanceof Number always returns false. Update: instanceof now goes 2/3 the speed!
So yet another update
Object.prototype.toString.call(variable) === '[object Array]';
This guy is the slowest for trying to check for an Array. However, this is a one stop shop for any type you're l...
“Could not find any information for class named ViewController”
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@Michael, Yes, now I'm in a situation where none of the above works at all. Xcode is a ***
– Chris Harrison
Feb 6 '15 at 9:43
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Is it possible to reopen a closed branch in Mercurial?
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try with following:
hg pull && hg update branch_name
Now make a small change to one of the file and then commit it
hg commit -m "minor change"
then push it
hg push -b .
Now you should be able to work normally.
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Private and protected constructor in Scala
...m's Programming Scala. I don't have a PDF of Beginning Scala with me right now to check it out.
– Daniel C. Sobral
Nov 13 '09 at 18:53
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How to get nice formatting in the Rails console
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Its now YAML::ENGINE.yamler = 'psych'
– jumpa
Dec 5 '13 at 5:53
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