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How to check whether a string contains a substring in Ruby
...clude on it's own is not ideal as it can throw a NoMethodError if nil test = nil test.include?("test") NoMethodError: undefined method `include?' for nil:NilClass should always convert the value being included to the expected value:- test.to_s.include?("test")
–...
Flattening a shallow list in Python [duplicate]
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An explicit loop that uses .extend method is the fastest solution according to this benchmark
– jfs
Apr 30 '14 at 2:02
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How do you design object oriented projects? [closed]
...e to develop and check how it looks. These programs will become functional tests of your library when completed.
After this first iteration, you will have a better understanding on how things interact, got out the details and the rough spots, solved issues with a slapped duct tape patch. You are re...
Casting to string in JavaScript
... at all defined, you will still get an error for String(). Example: String(test); throws Uncaught ReferenceError: test is not defined, while var test; String(test); will result in "undefined".
– Anthony
Sep 22 '17 at 20:07
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Python: How do I make a subclass from a superclass?
... the direction specified by the reverse keyword argument, as the following tests illustrate:
import pytest
def test_1():
assert SortedList([5, 2, 3]) == [2, 3, 5]
def test_2():
SortedList([5, 2, 3], reverse=True) == [5, 3, 2]
def test_3():
with pytest.raises(TypeError):
sorte...
Convert NaN to 0 in javascript
... 0;
...which will have the same effect as above.
If the intent was to test for more than just NaN, then you can do the same, but do a toNumber conversion first.
a = +a || 0
This uses the unary + operator to try to convert a to a number. This has the added benefit of converting things like nu...
Mechanisms for tracking DB schema changes [closed]
...me of our tasks this way (pushing builds up to a staging server, deploying tested code to a production server) but we're still doing database updates manually. I would like to find or create a solution that allows us to work efficiently across servers with different environments while continuing to...
Regex Named Groups in Java
...and Matching Strings with Balanced Parentheses slide)
Example:
String:
"TEST 123"
RegExp:
"(?<login>\\w+) (?<id>\\d+)"
Access
matcher.group(1) ==> TEST
matcher.group("login") ==> TEST
matcher.name(1) ==> login
Replace
matcher.replaceAll("aaaaa_$1_sssss_$2____") ==>...
How to overwrite existing files in batch?
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xcopy /s/Y c:\mmyinbox\test.doc C:\myoutbox (Y is a CAPITAL.)
– Halfacht
Jan 16 '18 at 13:08
add a comment
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Download a single folder or directory from a GitHub repo
...an example.
Navigate to the folder you want to download. Let's download /test from master branch.
Modify the URL for subversion. Replace tree/master with trunk.
https://github.com/lodash/lodash/tree/master/test ➜
https://github.com/lodash/lodash/trunk/test
Download the folder. Go to the comma...