I tried erlang-ish [1|2] in python and something came out...

[process]

In erlang you can cons like this: [1|2]. i tried this in python and it
didnt raise an error but i dont know what the result do

>>[1|2]

[3]

>>[2|2]

[2]

>>a = [2|2]
a

[2]

>>[2|3]

[3]

>>[2|1]

[3]

>>>

[Gary Herron]

process wrote:

In erlang you can cons like this: [1|2]. i tried this in python and it
didnt raise an error but i dont know what the result do

In Python | is the logical bitwise-OR operator. Look at the binary
representation of the numbers to understand it.

Gary Herron

>

>>>[1|2]

[3]

>>>[2|2]

[2]

>>>a = [2|2]
a

[2]

>>>[2|3]

[3]

>>>[2|1]

[3]

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[Chris Rebert]

On Sun, Sep 21, 2008 at 10:02 AM, process <ci**********@gmail.comwrote:

In erlang you can cons like this: [1|2]. i tried this in python and it
didnt raise an error but i dont know what the result do

In Python, like in C, the "|" operator on integers performs a bitwise-OR.
To "cons" nondestructively onto a list, do e.g. [head_value] + tail,
but note that this isn't very idiomatic.
CPython's lists are implemented internally as arrays, not linked
lists, hence why there's no "cons" operator in Python.
You may also be interested in list.append()

Regards,
Chris

>

>>>[1|2]

[3]

>>>[2|2]

[2]

>>>a = [2|2]
a

[2]

>>>[2|3]

[3]

>>>[2|1]

[3]

>>>>

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