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What does the “|” (single pipe) do in JavaScript?
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This is a bitwise or.
Since bitwise operations only make sense on integers, 0.5 is truncated.
0 | x is x, for any x.
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Regex to match only letters
...es one letter from A–Z in lowercase and uppercase. [a-zA-Z]+ matches one or more letters and ^[a-zA-Z]+$ matches only strings that consist of one or more letters only (^ and $ mark the begin and end of a string respectively).
If you want to match other letters than A–Z, you can either add them ...
Meaning of “[: too many arguments” error from if [] (square brackets)
I couldn't find any one simple straightforward resource spelling out the meaning of and fix for the following BASH shell error, so I'm posting what I found after researching it.
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Loop through an array of strings in Bash?
...r=("element1" "element2" "element3")
## now loop through the above array
for i in "${arr[@]}"
do
echo "$i"
# or do whatever with individual element of the array
done
# You can access them using echo "${arr[0]}", "${arr[1]}" also
Also works for multi-line array declaration
declare -a arr=(...
NameError: global name 'unicode' is not defined - in Python 3
...rying to use a Python package called bidi. In a module in this package (algorithm.py) there are some lines that give me error, although it is part of the package.
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Regular Expressions- Match Anything
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Normally the dot matches any character except newlines.
So if .* isn't working, set the "dot matches newlines, too" option (or use (?s).*).
If you're using JavaScript, which doesn't have a "dotall" option, try [\s\S]*. Thi...
What is the difference between Ruby 1.8 and Ruby 1.9
...ent" version of Ruby (1.8) and the "new" version (1.9). Is there an "easy" or a "simple" explanation of the differences and why it is so different?
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Python: Find in list
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As for your first question: that code is perfectly fine and should work if item equals one of the elements inside myList. Maybe you try to find a string that does not exactly match one of the items or maybe you are using a float ...
Constant Amortized Time
What is meant by "Constant Amortized Time" when talking about time complexity of an algorithm?
6 Answers
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List comprehension: Returning two (or more) items for each item
Is it possible to return 2 (or more) items for each item in a list comprehension?
6 Answers
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