string slice(string s, int start, int end)
string slice(string s, int start, int end, int step)
Extracts a string from a larger string.
<type>[] slice(<type>s[], int start, int end)
<type>[] slice(<type>s[], int start, int end, int step)
Extracts a sub-array from a larger array.
string slice(string s, int hasstart, int start, int hasend, int end, int hasstep, int step)
<type>[] slice(<type>array[], int hasstart, int start, int hasend, int end, int hasstep, int step)
A general-purpose signature to support the slicing syntax. If hasstart is 0, it ignores start and uses 0. If hasend is 0 it ignores end and uses the length of the array. If hasstep is 0 it ignores step and uses 1.
-
This is the function equivalent of using
value[start:end:step]slicing syntax. -
If
startorendare negative, they count from the end of the string/array. -
The computed range is clamped to the bounds of the original string/array.
-
If step is zero, the function returns an empty string/array.
-
If step is negative, the items are returned in reverse, and
endshould be less thanstart.
Examples ¶
int[] nums = {10, 20, 30, 40, 50, 60}; slice(nums, 1, 3) == {20, 30}; // nums[1:3] slice(nums, 1, -1) == {20, 30, 30, 40, 50}; // nums[1:-1] slice(nums, 0, len(nums), 2) == {20, 40, 60}; // nums[0:len(nums):2] slice(nums, 0, 0, 0, 0, 1, 2) == {20, 40, 60}; // nums[::2]
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