Programming-Idioms

History of Idiom 26 > diff from v94 to v95

Edit summary for version 95 by programming-idioms.org:
Restored version 90: No.

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Version 94

2021-12-19, 13:28:29

Version 95

2021-12-20, 11:11:31

Idiom #26 Create a 2-dimensional array

Declare and initialize a matrix x having m rows and n columns, containing real numbers.

Idiom #26 Create a 2-dimensional array

Declare and initialize a matrix x having m rows and n columns, containing real numbers.

Variables

x,m,n

Variables

x,m,n

Extra Keywords

Python

Code

print(5)

Python

Python

Code

print(x, m, n)

Code

x = [[0] * n for _ in range(m)]

Comments bubble

Do not just "multiply by m", which would duplicate the references to the inner arrays.

Comments bubble

Do not just "multiply by m", which would duplicate the references to the inner arrays.

Python

Python

Code

print(x, m ,n )

Code

x = [[0 for j in xrange(n)] for i in xrange(m)]

Comments bubble

Python 2.7

xrange doesn't exist in Python 3.

Comments bubble

Python 2.7

xrange doesn't exist in Python 3.

Origin

http://stackoverflow.com/a/6667288/871134

Origin

http://stackoverflow.com/a/6667288/871134

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History of Idiom 26 > diff from v94 to v95

Version 94

Version 95

Idiom #26 Create a 2-dimensional array

Idiom #26 Create a 2-dimensional array

Variables

Variables

Extra Keywords

Extra Keywords

Code

Code

Code

Comments bubble

Comments bubble

Code

Code

Comments bubble

Comments bubble

Origin

Origin

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