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Code Issues 1 Releases Wiki Activity

Explain the logic behind negative slice indices.

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Andrew Chambers
2019-12-03 22:05:43 +13:00
parent fc53445d08
commit a20e956f6d
3 changed files with 8 additions and 3 deletions
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5
src/core/tuple.c
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@@ -143,7 +143,10 @@ static const JanetReg tuple_cfuns[] = {
JDOC("(tuple/slice arrtup [,start=0 [,end=(length arrtup)]])\n\n"
"Take a sub sequence of an array or tuple from index start "
"inclusive to index end exclusive. If start or end are not provided, "
"they default to 0 and the length of arrtup respectively."
"they default to 0 and the length of arrtup respectively. "
"'start' and 'end' can also be negative to indicate indexing "
"from the end of the input. Note that index -1 is synonymous with "
"index '(length arrtup)' to allow a full negative slice range. "
"Returns the new tuple.")
},
{