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Bash/sh - difference between && and ;
...because a long time ago at the nearby computer:
root# pwd
/
root# cd /tnp/test; rm -rf *
cd: /tnp/test: No such file or directory
...
... and after a while ...
...
^C
but not helped... ;)
cd /tnp/test && rm -rf * is safe... ;)
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How do I read CSV data into a record array in NumPy?
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I tested code similar to this with a csv file containing 2.6 million rows and 8 columns. numpy.recfromcsv() took about 45 seconds, np.asarray(list(csv.reader())) took about 7 seconds, and pandas.read_csv() took about 2 seconds ...
How do you check if a variable is an array in JavaScript? [duplicate]
... the one you have chosen.
variable.constructor === Array
This is the fastest method on Chrome, and most likely all other browsers. All arrays are objects, so checking the constructor property is a fast process for JavaScript engines.
If you are having issues with finding out if an objects proper...
Is there a way to use PhantomJS in Python?
...antomjs/ghostdriver in python webdriver?
https://dzone.com/articles/python-testing-phantomjs
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How to assign the output of a Bash command to a variable? [duplicate]
...
In shell you assign to a variable without the dollar-sign:
TEST=`pwd`
echo $TEST
that's better (and can be nested) but is not as portable as the backtics:
TEST=$(pwd)
echo $TEST
Always remember: the dollar-sign is only used when reading a variable.
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Connection pooling options with JDBC: DBCP vs C3P0
...e. Some time back we conducted an in-house analysis of the two, creating a test fixture which generated load and concurrency against the two to assess their suitability under real life conditions.
DBCP consistently generated exceptions into our test application and struggled to reach levels of per...
Convert a PHP object to an associative array
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class Test{
const A = 1;
public $b = 'two';
private $c = test::A;
public function __toArray(){
return call_user_func('get_object_vars', $this);
}
}
$my_test = new Test();
var_dump((array)$my_test);
var...
What's the best way to detect a 'touch screen' device using JavaScript?
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Modernizr does not test for touch screens. It tests for the existence of touch events in the browser. See the "Misc Tests" section in the docs: modernizr.com/docs/#features-misc
– Harry Love
Jan 24 '12 at ...
Cross-browser testing: All major browsers on ONE machine
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Contents
Which browsers have to be tested?
Rules of thumb: Which browsers should be included?
Preparation
Windows XP
Windows 7+ (for IE9+)
Browser downloads
Internet Explorer
Firefox
Opera
Chrome
Safari
Adobe Flash Pl...
Container View Controller Examples [closed]
... autorelease];
// create test1 and test2 instance (subclass UIViewController and
// also need to define their own nibs)
vc1 = [[test1 alloc]initWithNibName:@"test1" bundle:nil];
vc2 = [[test2 alloc]initWithNibName:@"test2" bundle:nil];
...