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How to replace an entire line in a text file by line number
...ained in the comments: the 1 always evaluates true, so the associated code block always runs. But there is no associated code block, which means AWK does its default action of just printing the whole line. AWK is designed to allow terse programs like this.
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What does “%” (percent) do in PowerShell?
It seems that the % operation starts script blocks after the pipeline, although about_Script_Blocks indicates the % isn't necessary.
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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...ector component to rotate an ImageSprite on canvas. The Designer view and block view of this demo app are shown below.
Here’s how to implement the rotationSprite app:
On Screen1, there is a Canvas, Canvas1, which contains an ImageSprite (ArrowSprite) that we want to rotate. Label1 will show...
Lock-free multi-threading is for real threading experts
...e today is STMs where you can put the two accesses e.g. in a single atomic block. All in all, consuming lock-free structures can be just as tricky in many cases.
– Andras Vass
Mar 27 '10 at 17:04
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Style child element when hover on parent
...u.
.parentDiv{
margin : 25px;
}
.parentDiv span{
display : block;
padding : 10px;
text-align : center;
border: 5px solid #000;
margin : 5px;
}
.parentDiv div{
padding:30px;
border: 10px solid green;
display : inline-block;
align : cente;
}
.parentDiv:hover{
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Grunt watch error - Waiting…Fatal error: watch ENOSPC
...ll also persist across reboots. For more details: wiki.archlinux.org/index.php/Sysctl
– tnajdek
Sep 27 '13 at 9:20
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Import a file from a subdirectory?
...nguage shouldn't impose its way of loading files across the filesystem. In PHP we solved the problem by letting the userland code register multiple autoloading functions that are called when a namespace/class is missing. Then the community has produced the PSR-4 standard and Composer implements it, ...
Ruby Array find_first object?
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use array detect method if you wanted to return first value where block returns true
[1,2,3,11,34].detect(&:even?) #=> 2
OR
[1,2,3,11,34].detect{|i| i.even?} #=> 2
If you wanted to return all values where block returns true then use select
[1,2,3,11,34].select(&:even?) ...
Any idea why I need to cast an integer literal to (int) here?
... it, synthetic sugar is used widely: eggcorns.lascribe.net/forum/viewtopic.php?id=4400 and synthetic sounds better to me.
– bestsss
Oct 26 '11 at 17:39
add a comment
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Recursive search and replace in text files on Mac and Linux
...e easyform to form360, I´m running the following command: find . -name '*.php' -print0 | xargs -0 sed -i "" "s/easyform/form360/g"
– Andres Ramos
Jan 26 '17 at 21:23
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