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Can I use require(“path”).join to safely concatenate urls?
...e case where it doesn't work, etc., you could use this package.
url-join
https://github.com/jfromaniello/url-join
Install
npm install url-join
Usage
var urljoin = require('url-join');
var fullUrl = urljoin('http://www.google.com', 'a', '/b/cd', '?foo=123');
console.log(fullUrl);
Prints:
'...
Test whether string is a valid integer
...ve numbers), followed by one or more decimal digits.
References:
http://www.tldp.org/LDP/abs/html/bashver3.html#REGEXMATCHREF
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How is std::function implemented?
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Why is it wrong to use std::auto_ptr with standard containers?
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How get integer value from a enum in Rails?
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CSS: bolding some text without changing its container's size
...hat text rendering on Mac offers.. :)
http://jsfiddle.net/85LbG/
Credit: https://stackoverflow.com/a/20249560/5061744
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Why are there two kinds of functions in Elixir?
I'm learning Elixir and wonder why it has two types of function definitions:
8 Answers
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Asserting successive calls to a mock method
...ll(3)]
>>> mock.assert_has_calls(calls, any_order=True)
Source: https://docs.python.org/3/library/unittest.mock.html#unittest.mock.Mock.assert_has_calls
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How do I compute derivative using Numpy?
How do I calculate the derivative of a function, for example
8 Answers
8
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How to sum a variable by group
...
Using aggregate:
aggregate(x$Frequency, by=list(Category=x$Category), FUN=sum)
Category x
1 First 30
2 Second 5
3 Third 34
In the example above, multiple dimensions can be specified in the list. Multiple aggregated metrics of the same data type can be incorporated via cbind:
ag...