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MySQL: @variable vs. variable. What's the difference?
... will only be available in the current batch of queries (stored procedure, script, or otherwise). It will not be available in a different batch in the same session.
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Why would iterating over a List be faster than indexing through it?
...ow compared to that for the LinkedList implementation.
A related question titled "Big-O Summary for Java Collections Framework" has an answer pointing to this resource, "Java Collections JDK6" which you might find helpful.
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What's the difference between => , ()=>, and Unit=>
...and I realize that the answer I selected only answered the question in the title, not the one I actually had (which this one does answer).
– Malvolio
Apr 11 '15 at 7:14
add a ...
TimeStamp on file name using PowerShell
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You can insert arbitrary PowerShell script code in a double-quoted string by using a subexpression, for example, $() like so:
"C:\temp\mybackup $(get-date -f yyyy-MM-dd).zip"
And if you are getting the path from somewhere else - already as a string:
$dirNam...
数据结构与本地数据库 06：把卡片迁移到 SQLite · App Inventor 2 中文网
... function HideORDispFeedback() { $("#feedback").toggle();}function makeTitleDraggable(element, titleElement) { let isDragging = false; let offsetX, offsetY; // 只在标题栏上按下时开始拖动 titleElement.onmousedown = function(e) { isDragging = true; offset...
How to keep environment variables when using sudo
...$_EXPORTS; do printf '%q=%q ' "$x" "${!x}"; done;) "$@"
}
# create a test script to call as sudo
echo 'echo Forty-Two is $VAR42' > sudo_test.sh
chmod +x sudo_test.sh
export VAR42="The Answer to the Ultimate Question of Life, The Universe, and Everything."
export _EXPORTS="_EXPORTS VAR1 VAR2 VA...
How to retrieve a user environment variable in CMake (Windows)
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Getting variables into your CMake script
You can pass a variable on the line with the cmake invocation:
FOO=1 cmake
or by exporting a variable in BASH:
export FOO=1
Then you can pick it up in a cmake script using:
$ENV{FOO}
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Disable messages upon loading a package
...ssages are printed. This is ordinarily fine, but since the output of my R script is being used for further analysis I want to completely disable all of this output. How do I do that? Furthermore, I'd prefer to do it without having to modify ROCR at all, so that future users of this script don't h...
How to tell if rails is in production?
I used script/server -e production to start rails in production mode. It did and I got no errors. However how do I tell if it is in production mode? I tried a non-existent route, and I got a similar error page I did in development.
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HTML File Selection Event
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we gonna write it where.. in javascript script tags
– Moon
Aug 20 '10 at 5:34
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