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to drawRect or not to drawRect (when should one use drawRect/Core Graphics vs subviews/images and wh
...frame rate on the oldest hardware your app will support. If you can't get 60fps, drop down to CoreGraphics. When you've done this for a while, you get a sense for when UIKit is probably a waste of time.
So, why is Core Graphics fast?
CoreGraphics isn't really fast. If it's being used all the time,...
How to extract request http headers from a request using NodeJS connect
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edited Jan 15 '16 at 18:04
gilly3
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answer...
Finding the number of days between two dates
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$now = time(); // or your date as well
$your_date = strtotime("2010-01-31");
$datediff = $now - $your_date;
echo round($datediff / (60 * 60 * 24));
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What is the purpose of the : (colon) GNU Bash builtin?
...nds. true was instead simply aliased to :, and false to something like let 0.
: is slightly better than true for portability to ancient Bourne-derived shells. As a simple example, consider having neither the ! pipeline operator nor the || list operator (as was the case for some ancient Bourne shell...
Reading Excel files from C#
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var fileName = string.Format("{0}\\fileNameHere", Directory.GetCurrentDirectory());
var connectionString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0; data source={0}; Extended Properties=Excel 8.0;", fileName);
var adapter = new OleDbDataAdapter("SE...
ComponentTools 拓展：设置组件的边距等 · App Inventor 2 中文网
...https://community.appinventor.mit.edu/t/free-component-tools-extension/15803
您的改进建议 联系方式： 不需要回复的可留空~ 意见反馈（300字以内）： 给个鼓励也行呐~o~ 提供截图...
case-insensitive list sorting, without lowercasing the result?
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202
In Python 3.3+ there is the str.casefold method that's specifically designed for caseless match...
Pandas count(distinct) equivalent
...CODE.nunique()
Example:
In [2]: table
Out[2]:
CLIENTCODE YEARMONTH
0 1 201301
1 1 201301
2 2 201301
3 1 201302
4 2 201302
5 2 201302
6 3 201302
In [3]: table.groupby('YEARMONTH').CLIENTCODE.nun...
Understanding PrimeFaces process/update and JSF f:ajax execute/render attributes
...t-param>
Alternatively, you can also use <o:form> of OmniFaces 3.0+ which defaults to this behavior.
The standard JSF equivalent to the PrimeFaces specific process is execute from <f:ajax execute>. It behaves exactly the same except that it doesn't support a comma-separated string wh...
Printing hexadecimal characters in C
...ur case), your chars are being promoted to int via sign-extension.
Since c0 and 80 have a leading 1-bit (and are negative as an 8-bit integer), they are being sign-extended while the others in your sample don't.
char int
c0 -> ffffffc0
80 -> ffffff80
61 -> 00000061
Here's a solution:...