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Why 0 is true but false is 1 in the shell?
...it code of 0 (the result of /bin/true). Otherwise they evaluate as false.
Strings are evaluated differently than exit codes:
if [ 0 ] ; then echo not null ; fi
if [ $(echo 0) ] ; then echo not null ; fi
if [ -z "" ] ; then echo null ; fi
The (( )) arithmetic operator interprets 1 and 0 as true ...
How to create a jQuery plugin with methods?
...the wrapping function) and check for an entry if the parameter passed is a string, reverting to a default method ("init" here) if the parameter is an object (or null).
Then you can call the methods like so...
$('div').tooltip(); // calls the init method
$('div').tooltip({ // calls the init method...
How is a CRC32 checksum calculated?
... For CRC32 or CRC32b , do we get hash collision meaning for two different strings do we get same CRC
– indianwebdevil
May 18 at 2:42
1
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In c# what does 'where T : class' mean?
.... You won't be able to put value types (structs and primitive types except string) there.
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Prevent Bootstrap Modal from disappearing when clicking outside or pressing escape? [duplicate]
I'm using the Twitter Bootstrap modal as a wizard window, and would like to prevent the user from closing it when clicking outside of the modal or when pressing escape. Instead, I want it to be closed when the user presses the finish button. How could I achieve this scenario?
...
How to Loop through items returned by a function with ng-repeat?
...ope for all watches $digest runs it, gets current value (watch.get(scope)) and compares it to watch.last. If current value is not equal to watch.last (always for first compare) $digest sets dirty to true. When all scopes are processed if dirty == true $digest starts another depth-first traversal fro...
How to find Unused Amazon EC2 Security groups
...'m try to find a way to determine orphan security groups so I can clean up and get rid of them. Does anyone know of a way to discover unused security groups.
...
Open existing file, append a single line
... (I like this)
File.AppendAllLines(
"FileAppendAllLines.txt",
new string[] { "line1", "line2", "line3" });
//Method 2
File.AppendAllText(
"FileAppendAllText.txt",
"line1" + Environment.NewLine +
"line2" + Environment.NewLine +
"line3" + Environment.NewLine);
//Method 3
usi...
Capybara Ambiguity Resolution
... As of Capybara 2.0 don't do this unless you absolutely have to. See @Andrey's answer below and the explanation of Ambiguous Matches in the upgrade guide linked above.
– jim
Oct 8 '14 at 23:34
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Format date to MM/dd/yyyy in JavaScript [duplicate]
...
Correct answer should be var result = ((date.getMonth().toString().length > 1) ? (date.getMonth() + 1) : ('0' + (date.getMonth() + 1))) + '/' + ((date.getDate().toString().length > 1) ? date.getDate() : ('0' + date.getDate())) + '/' + date.getFullYear()
–...