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Explain the logic behind negative slice indices.
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@ -273,7 +273,8 @@ static const JanetReg array_cfuns[] = {
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"Takes a slice of array or tuple from start to end. The range is half open, "
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"[start, end). Indexes can also be negative, indicating indexing from the end of the "
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"end of the array. By default, start is 0 and end is the length of the array. "
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"Returns a new array.")
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"Note that index -1 is synonymous with index (length arrtup) to allow a full "
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"negative slice range. Returns a new array.")
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},
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{
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"array/concat", cfun_array_concat,
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@ -525,7 +525,8 @@ static const JanetReg string_cfuns[] = {
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"Returns a substring from a byte sequence. The substring is from "
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"index start inclusive to index end exclusive. All indexing "
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"is from 0. 'start' and 'end' can also be negative to indicate indexing "
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"from the end of the string.")
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"from the end of the string. Note that index -1 is synonymous with "
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"index (length bytes) to allow a full negative slice range. ")
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},
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{
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"string/repeat", cfun_string_repeat,
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@ -143,7 +143,10 @@ static const JanetReg tuple_cfuns[] = {
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JDOC("(tuple/slice arrtup [,start=0 [,end=(length arrtup)]])\n\n"
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"Take a sub sequence of an array or tuple from index start "
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"inclusive to index end exclusive. If start or end are not provided, "
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"they default to 0 and the length of arrtup respectively."
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"they default to 0 and the length of arrtup respectively. "
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"'start' and 'end' can also be negative to indicate indexing "
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"from the end of the input. Note that index -1 is synonymous with "
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"index '(length arrtup)' to allow a full negative slice range. "
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"Returns the new tuple.")
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},
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{
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