Loop over multiple arrays simultaneously: Difference between revisions
Loop over multiple arrays simultaneously (view source)
Revision as of 19:09, 6 May 2022
, 2 years ago→{{header|Picat}}
Line 2,903:
This implementation throws an exception if the arrays are not all the
same length.
=={{header|Picat}}==
Picat has a built-in zip/n and only works with lists (not arrays). It returns an array tuple ({A,B,C}) and not a list ([A,B,C]), which is a typical gotcha.
For this task, a foreach loop and list comprenhension are shown.
If the lists/arrays are of uneven lengths, then the elements in the longer arrays are skipped.
<lang Picat>import util.
go =>
L1 = ["a","b","c"],
L2 = ["A","B","C"],
L3 = ["1","2","3"],
println("foreach loop:"),
foreach({A,B,C} in zip(L1,L2,L3))
println([A,B,C].join(''))
end,
nl,
println("list comprehension/n:"),
println( [[A,B,C].join('') : {A,B,C} in zip(L1,L2,L3)].join("\n")),
nl,
% With uneven lengths the last elements in the longer lists are skipped.
println("Uneven lengths:"),
L4 = ["P","Q","R","S"], % longer than the other
foreach({A,B,C,D} in zip(L1,L2,L3,L4))
println([A,B,C,D].join(''))
end,
nl.</lang>
Output:
<pre>foreach loop:
aA1
bB2
cC3
list comprehension/n:
aA1
bB2
cC3
Uneven lengths:
aA1P
bB2Q
cC3R</pre>
=={{header|PicoLisp}}==
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