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Write lines of text to a file in R
...ike to add lines to the same file? (The issue being is that you can't have more then one connection to a file, If I am not mistaken) Thanks.
– Tal Galili
Mar 18 '10 at 15:02
8
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Swift - How to convert String to Double
... converted (i.e.: bad user input).
let lessPrecisePI = Float("3.14")
let morePrecisePI = Double("3.1415926536")
let invalidNumber = Float("alphabet") // nil, not a valid number
Unwrap the values to use them using if/let
if let cost = Double(textField.text!) {
print("The user entered a valu...
How can I start PostgreSQL server on Mac OS X?
...brew package manager includes launchctl plists to start automatically. For more information, run brew info postgres.
Start manually
pg_ctl -D /usr/local/var/postgres start
Stop manually
pg_ctl -D /usr/local/var/postgres stop
Start automatically
"To have launchd start postgresql now and restart at lo...
angularJS: How to call child scope function in parent scope
.../jsfiddle.net/wUPdW/2/
UPDATE: There is another version, less coupled and more testable:
function ParentCntl($scope) {
$scope.msg = "";
$scope.get = function(){
$scope.$broadcast ('someEvent');
return $scope.msg;
}
$scope.$on('pingBack', function(e,data) {...
How to count instances of character in SQL Column
...
Just be aware that if there are more than "N" or "Y" in the string then this could be inaccurate. See nickf's solution for a more robust method.
– Tom H
Dec 7 '09 at 15:28
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Find and Replace Inside a Text File from a Bash Command
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How can I run an external command asynchronously from Python?
...r stderr pipe such that it blocks waiting for the OS pipe buffer to accept more data. Use communicate() to avoid that. "
– Ali Afshar
Mar 11 '09 at 22:12
15
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Python memory leaks [closed]
...rint_diff) | 1 | 480 B
This package provides a number of more features. Check pympler's documentation, in particular the section Identifying memory leaks.
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How to add images to README.md on GitHub?
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486
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Difference between TCP and UDP?
...each destination and can arrive out of order or don't arrive at all. It is more efficient than TCP because it uses non ACK. It's generally used for real time communication, where a little percentage of packet loss rate is preferable to the overhead of a TCP connection.
In certain situations UDP is...