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在线云编程:WebIDE - IT产品资讯 - 清泛网 - 专注IT技能提升
在线云编程:WebIDE云编程 WebIDE只需一个浏览器，你就可以写代码啦，并且可以进行云端编译、运行结果。没错，编码已经进入云时代，由初创公司扣钉网络推出WebIDE，可以实现云端编程。暂略。
Fast and Lean PDF Viewer for iPhone / iPad / iOS - tips and hints?
...ayer: (CALayer*)layer inContext: (CGContextRef) context is like :
CGAffineTransform currentCTM = CGContextGetCTM(context);
if (currentCTM.a == 1.0 && baseImage) {
//Calculate ideal scale
CGFloat scaleForWidth = baseImage.size.width/self.bounds.size.width;
CGFloat scaleForHei...
New line in JavaScript alert box
...rpret more escape sequences for special characters
escape sequences \n is transformed as 0x0A ASCII Escaped character and this character is not displayed in the alert box. The solution consists in to escape this special sequence:
$s = "Hello everybody \\n this is an alert box";
echo "<script>...
Count number of occurences for each unique value
...1,2, 2, 2), 25))
library("plyr")
data_frame <- ddply(data_frame, .(v), transform, n = length(v))
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String.IsNullOrWhiteSpace in LINQ Expression
...is processed by a LINQ provider to deliver an optimized query. During this transformation not all C# statements are supported, as it either is not possible to translate them to a back-end specific query (e.g. SQL) or because the implementer did not foresee the need for the statement.
In contrast I...
In which situations do we need to write the __autoreleasing ownership qualifier under ARC?
... the declaration means __strong, implicitly:
NSError * e = nil;
Will be transformed to:
NSError * __strong error = nil;
When you call your save method:
- ( BOOL )save: ( NSError * __autoreleasing * );
The compiler will then have to create a temporary variable, set at __autoreleasing. So:
N...
Get item in the list in Scala?
...apply parentheses surrounding one or more values to a variable, Scala will transform the code into an invocation of a method named apply on that variable. So greetStrings(i) gets transformed into greetStrings.apply(i). Thus accessing an element of an array in Scala is simply a method call like any o...
How can you find the height of text on an HTML canvas?
...
EDIT: Are you using canvas transforms? If so, you'll have to track the transformation matrix. The following method should measure the height of text with the initial transform.
EDIT #2: Oddly the code below does not produce correct answers when I ru...
CSS center display inline block?
...relative;
}
.childDiv {
position: absolute;
left: 50%;
transform: translateX(-50%);
}
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How can I save an image with PIL?
...Python image library (PIL) using a post I found earlier to perform fourier transforms of images and I can't get the save function to work. The whole code works fine but it just wont save the resulting image:
...