Elixir Function of the Day

A start page for alchemists! Roll the dice.

String.slice/2

 Share!

Function signature:

slice(string, range)

Documentation:

Returns a substring from the offset given by the start of the range to the offset given by the end of the range.

If the start of the range is not a valid offset for the given string or if the range is in reverse order, returns "".

If the start or end of the range is negative, the whole string is traversed first in order to convert the negative indices into positive ones.

Remember this function works with Unicode graphemes and considers the slices to represent grapheme offsets. If you want to split on raw bytes, check Kernel.binary_part/3 instead.

Examples

iex> String.slice("elixir", 1..3)
"lix"

iex> String.slice("elixir", 1..10)
"lixir"

iex> String.slice("elixir", 10..3)
""

iex> String.slice("elixir", -4..-1)
"ixir"

iex> String.slice("elixir", 2..-1)
"ixir"

iex> String.slice("elixir", -4..6)
"ixir"

iex> String.slice("elixir", -1..-4)
""

iex> String.slice("elixir", -10..-7)
""

iex> String.slice("a", 0..1500)
"a"

iex> String.slice("a", 1..1500)
""