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Change key pair for ec2 instance
...key).
If you still have SSH access, please use one of the answers below.
https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html#replacing-lost-key-pair
Here is what I did, thanks to Eric Hammond's blog post:
Stop the running EC2 instance
Detach its /dev/xvda1 volume (let's call ...
Is HttpClient safe to use concurrently?
In all the examples I can find of usages of HttpClient , it is used for one off calls. But what if I have a persistent client situation, where several requests can be made concurrently? Basically, is it safe to call client.PostAsync on 2 threads at once against the same instance of HttpClient .
...
SVN needs-lock 设置强制只读属性（官方资料） - 更多技术 - 清泛网 - 专注...
...jar.$ \.odt.$ \.pdf.$ \.ppt.$ \.swf.$ \.vsd.$ \.xls.$ \.zip.[ DISCUZ_CODE_0 ]quot; %TEMP%\tempfile%2`) do (
%SVNLOOK% propget -t %2 %1 svn:needs-lock %%i 1> nul 2> nul
if ERRORLEVEL 1 (
echo commit denied, binary files must have property svn:needs-lock >&2
type %TEMP%\tempf...
List All Redis Databases
...eys=1,expires=0
You can find the description of the Redis protocol here:
http://redis.io/topics/protocol
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Using [UIColor colorWithRed:green:blue:alpha:] doesn't work with UITableView seperatorColor?
...ple UIColor category that does the messy looking division by itself: (from http://github.com/Jon889/JPGeneral)
//.h file
@interface UIColor (JPExtras)
+ (UIColor *)colorWithR:(CGFloat)red G:(CGFloat)green B:(CGFloat)blue A:(CGFloat)alpha;
@end
//.m file
@implementation UIColor (JPExtras)
+ (UIColo...
What does the tilde (~) mean in my composer.json file?
... example: ~4.1 will allow project versions >=4.1 but <5.0.
Credits: http://dwellupper.io/post/37/using-tilde-range-operator-to-resolve-dependency-version-in-composer-php
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how to POST/Submit an Input Checkbox that is disabled?
...a checkbox that, given certain conditions, needs to be disabled. Turns out HTTP doesn't post disabled inputs.
18 Answers
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Properties order in Margin
...,top"/>
- or -
<object Margin="thicknessReference"/>
See here: http://msdn.microsoft.com/en-us/library/system.windows.frameworkelement.margin.aspx
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Search for selection in vim
...ello" at the end of a line, with "world" at the start of the next line).
http://vim.wikia.com/wiki/Search_for_visually_selected_text
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For loop example in MySQL
...2,-1,0, |
+-------------------+
1 row in set (0.00 sec)
Do the tutorial: http://www.mysqltutorial.org/stored-procedures-loop.aspx
If I catch you pushing this kind of MySQL for-loop constructs into production, I'm going to shoot you with the foam missile launcher. You can use a pipe wrench to ban...