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Meaning of epsilon argument of assertEquals for double values
...nal double DELTA = 1e-15;
@Test
public void testDelta(){
assertEquals(123.456, 123.456, DELTA);
}
If you're using hamcrest assertions, you can just use the standard equalTo() with two doubles (it doesn't use a delta). However if you want a delta, you can just use closeTo() (see javadoc), e.g....
Truncate number to two decimal places without rounding
...2.55
2.99999 => 2.99
4.27 => 4.27
15.7784514 => 15.77
123.5999 => 123.59
0.000000199 => 1.99 *
* As mentioned in the note, that's due to javascript implicit conversion into exponential for "1.99e-7"
And for some other values of n:
15.001097 => 15.0010 (n=4)
0.00...
Count number of rows within each group
...count the number of rows within each group. I reguarly use the aggregate function to sum data as follows:
14 Answers
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`ui-router` $stateParams vs. $state.params
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The documentation reiterates your findings here: https://github.com/angular-ui/ui-router/wiki/URL-Routing#stateparams-service
If my memory serves, $stateParams was introduced later than the original $state.params, and seems to be a simple helper injector to avoid continuou...
Python equivalent of D3.js
...dated more recently. Though the examples are all static D3.
more info:
https://github.com/wrobstory/vincent
https://pypi.python.org/pypi/vincent/0.1.6
The graphs can be viewed in Ipython, just add this code
vincent.core.initialize_notebook()
Or output to JSON where you can view the JSON o...
unable to copy/paste in mingw shell
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
How to open multiple pull requests on GitHub
...
The easiest way I've found to do this is with the hub command (https://github.com/defunkt/hub).
From your topic branch ("feature" in this example) that you want to create a pull request for, you can just run:
git pull-request
(remember to push your branch first!)
And it will open a ...
RegEx to extract all matches from string using RegExp.exec
... console.log(m[1], m[2]);
}
} while (m);
Try it with this JSFiddle: https://jsfiddle.net/7yS2V/
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Alternative to itoa() for converting integer to string C++? [duplicate]
...
net.pku.edu.cn/~course/cs101/resource/www.cppreference.com/…
– spoulson
Oct 24 '08 at 17:30
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How can I print the contents of a hash in Perl?
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Data::Dumper is your friend.
use Data::Dumper;
my %hash = ('abc' => 123, 'def' => [4,5,6]);
print Dumper(\%hash);
will output
$VAR1 = {
'def' => [
4,
5,
6
],
'abc' => 123
...