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MySQL high CPU usage [closed]
...added to your computer's/server's clock. MySQLd does not seem to like this extra second on some OS'es, and yields a high CPU load. The quick fix is (as root):
$ /etc/init.d/ntpd stop
$ date -s "`date`"
$ /etc/init.d/ntpd start
...
How do I tell if a regular file does not exist in Bash?
... you are free to edit my post and add it to the list. I guess you mean: -n String - Check if the length of the string isn't zero. Or do you mean file1 -nt file2 - Check if file1 is newer then file 2 (you can also use -ot for older then)
– BlueCacti
May 5 '14 at...
What's an elegant way to conditionally add a class to an HTML element in a view?
...classes mixed with default classes, then you need to put that logic into a string interpolation or ERB tag.
Here's an updated approach that avoids putting any logic into the views:
<div class="<%= class_string(ok: @success) %>">
some message here
</div>
class_string method
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Ioc/DI - Why do I have to reference all layers/assemblies in application's entry point?
...t no longer happens automatically. Personally, I rarely find it worth that extra effort.
A more elaborate version of this answer can be found in this excerpt from my book Dependency Injection, Principles, Practices, Patterns.
...
ASP.NET MVC Html.ValidationSummary(true) does not display model errors
...ages from ModelState. When there is some Exception in controller action on string
9 Answers
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Why isn't `int pow(int base, int exponent)` in the standard C++ libraries?
...ay to do an operation" as a constraint. Rightly so, because for example to_string and lambdas are both conveniences for things you could do already. I suppose one could interpret "only one way to do an operation" very loosely to allow both of those, and at the same time to allow almost any duplicati...
UIImage: Resize, then Crop
...lways set to the full screen size of the device.
@implementation UIImage (Extras)
#pragma mark -
#pragma mark Scale and crop image
- (UIImage*)imageByScalingAndCroppingForSize:(CGSize)targetSize
{
UIImage *sourceImage = self;
UIImage *newImage = nil;
CGSize imageSize = sourceImage...
Classpath including JAR within a JAR
... The best way I know of now-a-days is to use IntelliJ jar artifact. It extracts all of the classes from the dependant jars and puts them in your one jar.
– enl8enmentnow
Jan 25 '14 at 17:50
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Constructors vs Factory Methods [closed]
...
Use a factory only when you need extra control with object creation, in a way that couldn't be done with constructors.
Factories have the possibility of caching for example.
Another way to use factories is in a scenario where you do not know the type you w...
Self-references in object literals / initializers
...d destroying a temporary function, adding complexity; and either leaves an extra property on the object or [if you delete that property] impacts the performance of subsequent property accesses on that object.)
If you need it to all be within one expression, you can do that without the temporary pro...