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How to initialize an array in one step using Ruby?
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You can use an array literal:
array = [ '1', '2', '3' ]
You can also use a range:
array = ('1'..'3').to_a # parentheses are required
# or
array = *('1'..'3') # parentheses not required, but included for clarity
For arrays of whitespace-delimited strings, you can us...
Insert an element at a specific index in a list and return the updated list
...] + a[index:].
However, another way is:
a = [1, 2, 4]
b = a[:]
b.insert(2, 3)
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Filter rows which contain a certain string
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263
The answer to the question was already posted by the @latemail in the comments above. You can us...
Regular Expression to reformat a US phone number in Javascript
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233
Assuming you want the format "(123) 456-7890":
function formatPhoneNumber(phoneNumberString) {...
Divide a number by 3 without using *, /, +, -, % operators
How would you divide a number by 3 without using * , / , + , - , % , operators?
48 Answers
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What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
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2343
The *args and **kwargs is a common idiom to allow arbitrary number of arguments to functions a...
StringIO in Python3
I am using Python 3.2.1 and I can't import the StringIO module. I use
io.StringIO and it works, but I can't use it with numpy 's genfromtxt like this:
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Output data from all columns in a dataframe in pandas [duplicate]
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Erel Segal-Halevi
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answered Nov 5 '12 at 18:13
YarivYariv
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Get the cartesian product of a series of lists?
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13 Answers
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How do you rotate a two dimensional array?
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63 Answers
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