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Round a double to 2 decimal places [duplicate]
If the value is 200.3456 , it should be formatted to 200.34 .
If it is 200 , then it should be 200.00 .
13 Answers
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What is the !! (not not) operator in JavaScript?
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Converts Object to boolean. If it was falsey (e.g. 0, null, undefined, etc.), it will be false, otherwise, true.
!oObject // inverted boolean
!!oObject // non inverted boolean so true boolean representation
So !! is not an operator, it's just the ! ...
JavaScript single line 'if' statement - best syntax, this alternative? [closed]
...ough opinion none the less, that forgoing curly brackets on a single line if statement is not ideal for maintainability and readability.
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convert UIImage to NSData
...ge format:
UIImageJPEGRepresentation
Returns the data for the specified image in JPEG format.
NSData * UIImageJPEGRepresentation (
UIImage *image,
CGFloat compressionQuality
);
UIImagePNGRepresentation
Returns the data for the specified image in PNG format
NSData * UIIma...
Check substring exists in a string in C
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if(strstr(sent, word) != NULL) {
/* ... */
}
Note that strstr returns a pointer to the start of the word in sent if the word word is found.
sha...
Can you break from a Groovy “each” closure?
...t an "each" without throwing an exception. You likely want a classic loop if you want the break to abort under a particular condition.
Alternatively, you could use a "find" closure instead of an each and return true when you would have done a break.
This example will abort before processing the w...
What is Scala's yield?
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or
from a in args select a.toUpperCase
in Linq.
Ruby's yield has a different effect.
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Controlling the screenshot in the iOS 7 multitasking switcher
... any sensitive user information, such as passwords or credit card numbers. If your interface contains such information, remove it from your views when entering the background. Also, dismiss alerts, temporary interfaces, and system view controllers that obscure your app’s content. The snapshot repr...
Quickly find whether a value is present in a C array?
...h an array of size 256 (preferably 1024, but 256 is the minimum) and check if a value matches the arrays contents. A bool will be set to true is this is the case.
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Finding median of list in Python
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What if you want to find median of a sorted array. So you cannot use built in function statistics.median because it will slow down while sorting again
– GilbertS
Feb 22 at 16:44
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