End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
Array#sort_by!
array.sort_by! {|element| ... } → self
array.sort_by! → new_enumerator
array.c
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static VALUE
rb_ary_sort_by_bang(VALUE ary)
{
VALUE sorted;
RETURN_SIZED_ENUMERATOR(ary, 0, 0, ary_enum_length);
rb_ary_modify(ary);
sorted = rb_block_call(ary, rb_intern("sort_by"), 0, 0, sort_by_i, 0);
rb_ary_replace(ary, sorted);
return ary;
}
Sorts the elements of self in place, using an ordering determined by the block; returns self.
Calls the block with each successive element; sorts elements based on the values returned from the block.
For duplicates returned by the block, the ordering is indeterminate, and may be unstable.
This example sorts strings based on their sizes:
Example
a = ['aaaa', 'bbb', 'cc', 'd'] a.sort_by! {|element| element.size } a # => ["d", "cc", "bbb", "aaaa"]
Returns a new Enumerator if no block given:
Example
a = ['aaaa', 'bbb', 'cc', 'd'] a.sort_by! # => #<Enumerator: ["aaaa", "bbb", "cc", "d"]:sort_by!>