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Core dumped, but core file is not in the current directory?
While running a C program, It says "(core dumped)" but I can't see any files under the current path.
12 Answers
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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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How to add “active” class to Html.ActionLink in ASP.NET MVC
... the <li> element and not the <a>. See the first example here: http://getbootstrap.com/components/#navbar
The way you handle your UI style based on what is active or not has nothing to do with ASP.NET MVC's ActionLink helper. This is the proper solution to follow how the Bootstrap frame...
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 .
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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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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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Xcode 4 - build output directory
...n.
You have 2 options:
Place build products in derived data location (recommended)
Place build products in locations specified by targets
Update:
On xcode 4.6.2 you need to click the advanced button on the right side below the derived data text field. Build Location select legacy.
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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 ...
How to use Comparator in Java to sort
I learned how to use the comparable but I'm having difficulty with the Comparator. I am having a error in my code:
14 Answ...