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How do I check if a string contains another string in Objective-C?
...");
}
The key is noticing that rangeOfString: returns an NSRange struct, and the documentation says that it returns the struct {NSNotFound, 0} if the "haystack" does not contain the "needle".
And if you're on iOS 8 or OS X Yosemite, you can now do: (*NOTE: This WILL crash your app if this code ...
AngularJS-Twig conflict with double curly braces
As you know, both angular and twig has common control construction - double curly braces. How can I change default value of Angular?
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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ile scriptfile
从脚本文件中读取awk命令。
-mf nnn and -mr nnn
对nnn值设置内在限制，-mf选项限制分配给nnn的最大块数目；-mr选项限制记录的最大数目。这两个功能是Bell实验室版awk的扩展功能，在标准awk中不适用。
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How do I compute derivative using Numpy?
...es
Automatic Derivatives
Symbolic Differentiation
Compute derivatives by hand.
Finite differences require no external tools but are prone to numerical error and, if you're in a multivariate situation, can take a while.
Symbolic differentiation is ideal if your problem is simple enough. Symbolic...
How can I compare two dates in PHP?
...n the database the date looks like this 2011-10-2
Store it in YYYY-MM-DD and then string comparison will work because '1' > '0', etc.
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How to pass an ArrayList to a varargs method parameter?
...r the whole function or you have to create the array in an additional step and suppress the warning on the variable you store it.
– Qw3ry
Jan 20 '17 at 10:31
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Passing references to pointers in C++
... reference to a pointer in C++. However, my attempts to do so are failing, and I have no idea why.
10 Answers
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Linking R and Julia?
Julia looks very promising for fast and syntax-sane computation (e.g. here ), but I suspect it will not be anywhere near R in terms of overall statistics workflow for some time yet. So I'd like to use it where C++ is mainly used in R programs: to optimize slow portions of code. Before I invest th...
Background color of text in SVG
...xt>
</svg>
A duplicate text item is being placed, with stroke and stroke-width attributes. The stroke should match the background colour, and the stroke-width should be just big enough to create a "splodge" on which to write the actual text.
A bit of a hack and there are potential issu...
continue processing php after sending http response
My script is called by server. From server I'll receive ID_OF_MESSAGE and TEXT_OF_MESSAGE .
12 Answers
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