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postgresql COUNT(DISTINCT …) very slow
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40
holy queries batman! This sped up my postgres count distinct from 190s to 4.5 whoa!
– rogerdpack
Nov ...
The simplest way to resize an UIImage?
...Phone app, I take a picture with the camera, then I want to resize it to 290*390 pixels. I was using this method to resize the image :
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C# equivalent to Java's charAt()?
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201
You can index into a string in C# like an array, and you get the character at that index.
Exam...
JPush 极光推送扩展 · App Inventor 2 中文网
...Hour, endHour, days)
设置允许推送的时间段。startHour/endHour: 0-23; days: 允许推送的星期（1=周日, 2=周一, …, 7=周六），如 [2,3,4,5,6] 表示工作日
SetSilenceTime(startHour, startMinute, endHour, endMinute)
设置静默时间段，此时间段内不会弹出通...
Following git-flow how should you handle a hotfix of an earlier release?
...e.
This thread has more information, with these examples:
git checkout 6.0
git checkout -b support/6.x
git checkout -b hotfix/6.0.1
... make your fix, then:
git checkout support/6.x
git merge hotfix/6.0.1
git branch -d hotfix/6.0.1
git tag 6.0.1
or using git flow commands
git flow support st...
Python Matplotlib figure title overlaps axes label when using twiny
...tlib, but at least for 1.3.1, this is simply:
plt.title(figure_title, y=1.08)
This also works for plt.suptitle(), but not (yet) for plt.xlabel(), etc.
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Capture characters from standard input without waiting for enter to be pressed
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101
That's not possible in a portable manner in pure C++, because it depends too much on the termin...
jQuery.active function
... and $.ajaxStop() (which I'll explain further), but they only care if it's 0 or not when a request starts or stops. But, since there's no reason to hide it, it's exposed to you can see the actual number of simultaneous AJAX requests currently going on.
When jQuery starts an AJAX request, this ha...
Sqlite LIMIT / OFFSET query
... andybalholm
11.6k22 gold badges2828 silver badges4040 bronze badges
answered Jul 24 '10 at 15:05
Bill KarwinBill Karwin
437k7777...
Check if bash variable equals 0 [duplicate]
I have a bash variable depth and I would like to test if it equals 0. In case yes, I want to stop executing of script. So far I have:
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