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How to use sed to replace only the first occurrence in a file?
...ion to the POSIX specification for sed that allows the following 2-address form: 0,/re/ (re represents an arbitrary regular expression here).
0,/re/ allows the regex to match on the very first line also. In other words: such an address will create a range from the 1st line up to and including the li...
What does the `forall` keyword in Haskell/GHC do?
...nderstand the existential notation in terms of its translation to the GADT form than on its own, but you are certainly free to think otherwise.
– dfeuer
Feb 8 '15 at 13:46
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Is it faster to count down than it is to count up?
...ister for zero and jumps based on the result of the test.
However, the performance difference will be negligible unless your loop is already very sensitive to clock cycle counts. Counting down to zero might shave 4 or 5 clock cycles off each iteration of the loop compared to counting up, so it's r...
Jquery date picker z-index issue
...It was always hidden. When I adjusted the z-index, the field on the lower form always showed up on the dialog.
I used a combination of solutions that I saw to resolve the issue.
$('.ui-datepicker', $form).datepicker({
showButtonPanel: true,
changeMonth: true,
...
How do I load a PHP file into a variable?
...l load then evaluate the file contents. The PHP file will need to be fully formed with <?php and ?> tags for eval to evaluate it.
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varbinary to string on SQL Server
...onvert a column value from varbinary(max) to varchar in human-readable form?
7 Answers
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Best practices for Storyboard login screen, handling clearing of data upon logout
...serObj = [[User alloc] init];
// Here you can get the data from login form
// and proceed to authenticate process
NSString *username = @"username retrieved through login form";
NSString *password = @"password retrieved through login form";
[userObj loginWithUsername:username and...
How to echo or print an array in PHP?
...contents of array you can use.
1) print_r($array); or if you want nicely formatted array then:
echo '<pre>'; print_r($array); echo '</pre>';
2) use var_dump($array) to get more information of the content in the array like datatype and length.
3) you can loop the array using php's f...
Why must a lambda expression be cast when supplied as a plain Delegate parameter
Take the method System.Windows.Forms.Control.Invoke(Delegate method)
8 Answers
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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
...or greater then 0. It is not guaranteed to be -1, 0 or 1 and there are platforms in the wild which don't return those values to gain speed of implementation. So if strcmp(a, b) == TRUE then a > b but reverse implication might not hold.
– Maciej Piechotka
Jun...