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What is Scala's yield?
...
or
from a in args select a.toUpperCase
in Linq.
Ruby's yield has a different effect.
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What are the undocumented features and limitations of the Windows FINDSTR command?
...ame of the file containing the matching line. The file name is not printed if the request was explicitly for a single file, or if searching piped input or redirected input. When printed, the fileName will always include any path information provided. Additional path information will be added if the ...
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...
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...
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...
mysql_fetch_array()/mysql_fetch_assoc()/mysql_fetch_row()/mysql_num_rows etc… expects parameter 1 to
...ult = mysql_query("SELECT * FROM Users WHERE UserName LIKE '$username'");
if($result === FALSE) {
die(mysql_error()); // TODO: better error handling
}
while($row = mysql_fetch_array($result))
{
echo $row['FirstName'];
}
mysqli extension
procedural style:
$username = mysqli_real_escape_...
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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How to find all combinations of coins when given some dollar value
...rful book Generatingfunctionology: math.upenn.edu/~wilf/DownldGF.html) and if you mean an expression like (1+√5)^n, it takes Ω(log n) time to compute, not constant time.
– ShreevatsaR
Jul 10 '09 at 18:33
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