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How does the String class override the + operator?
... is convertible (§5.1.8)to a primitive numeric type, or a compile-time error occurs.
In every case, the type of each of the operands of the binary - operator must be
a type that is convertible (§5.1.8) to a primitive numeric type, or a
compile-time error occurs.
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is node.js' console.log asynchronous?
Are console.log/debug/warn/error in node.js asynchrounous? I mean will javascript code execution halt till the stuff is printed on screen or will it print at a later stage?
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How to append output to the end of a text file
...o an existing file, it will alert you that the file exists already. Sample error message: file exists: testFile.txt
Thus, when you use > it will only allow you to create a new file, not overwrite an existing file.
share...
List goals/targets in GNU make that contain variables in their definition
...s, putting it in double quotes, but it just results in awk having a syntax error on the first comma... any thoughts on how to correctly escape this for a shell (bash) alias?
– drfrogsplat
Oct 25 '12 at 2:06
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What does the arrow operator, '->', do in Java?
... he came across that code elsewhere. As to why IntelliJ isn't reporting an error, that's a mystery (perhaps there is a Java 7 version installed somewhere in OP's system). But that's a lambda expression's syntax in Java, there's no question about it.
– Óscar López
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多媒体组件 · App Inventor 2 中文网
...器组件是一个类似按钮的组件。当用户单击该组件时，将提示他们从系统中选择一个文件。
还可以通过调用其 打开 方法以编程方式打开选择器。
使用文件选择器组件需要 Android 4.4 或更高版本、iOS 11 或更高版本。要求AI伴侣v2...
Why do we have map, fmap and liftM?
...t learning Haskell, when using map incorrectly, would much
rather see an error about lists than about Functors.
-- Typeclassopedia, page 20
fmap and liftM exist because monads were not automatically functors in Haskell:
The fact that we have both fmap and liftM is an
unfortunate consequen...
Rails: convert UTC DateTime to another time zone
... In irb, when I try Time.now.in_time_zone('CST'), I get the error "undefined method 'in_time_zone'". Are there rails classes that I need in order to get this to work?
– Drew Johnson
Apr 23 '10 at 2:59
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Converting Long to Date in Java returns 1970
I have list with long values (for example: 1220227200, 1220832000, 1221436800...) which I downloaded from web service. I must convert it to Dates. Unfortunately this way, for example:
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What do hjust and vjust do when making a plot using ggplot?
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I have tried that, and I get Error in grid.Call("L_textBounds", as.graphicsAnnot(x$label), x$x, x$y, : Polygon edge not found (zero-width or zero-height?) for vjust = .72 and higher.
– William Gunn
Sep 3 '11 at ...