Maintenance Ruby 3.3 gets fixes, but no new features. Switch to Ruby 4.0 →
instance method
Array#all?
array.all? → true or false
array.all? {|element| ... } → true or false
array.all?(obj) → true or false
array.c
View on GitHub ↗
static VALUE
rb_ary_all_p(int argc, VALUE *argv, VALUE ary)
{
long i, len = RARRAY_LEN(ary);
rb_check_arity(argc, 0, 1);
if (!len) return Qtrue;
if (argc) {
if (rb_block_given_p()) {
rb_warn("given block not used");
}
for (i = 0; i < RARRAY_LEN(ary); ++i) {
if (!RTEST(rb_funcall(argv[0], idEqq, 1, RARRAY_AREF(ary, i)))) return Qfalse;
}
}
else if (!rb_block_given_p()) {
for (i = 0; i < len; ++i) {
if (!RTEST(RARRAY_AREF(ary, i))) return Qfalse;
}
}
else {
for (i = 0; i < RARRAY_LEN(ary); ++i) {
if (!RTEST(rb_yield(RARRAY_AREF(ary, i)))) return Qfalse;
}
}
return Qtrue;
}
Returns true if all elements of self meet a given criterion.
If self has no element, returns true and argument or block are not used.
With no block given and no argument, returns true if self contains only truthy elements, false otherwise:
Example
[0, 1, :foo].all? # => true [0, nil, 2].all? # => false [].all? # => true
With a block given and no argument, calls the block with each element in self; returns true if the block returns only truthy values, false otherwise:
Example
[0, 1, 2].all? { |element| element < 3 } # => true [0, 1, 2].all? { |element| element < 2 } # => false
If argument obj is given, returns true if obj.=== every element, false otherwise:
Example
['food', 'fool', 'foot'].all?(/foo/) # => true ['food', 'drink'].all?(/bar/) # => false [].all?(/foo/) # => true [0, 0, 0].all?(0) # => true [0, 1, 2].all?(1) # => false
Related: Enumerable#all?