method

enum_slice

v1_8_7_330 - Show latest stable - 1 note - Class: Enumerable

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What's this?

enum_slice(p1) public

Iterates the given block for each slice of <n> elements. If no block is given, returns an enumerator.

e.g.:

(1..10).each_slice(3) {|a| p a}
# outputs below
[1, 2, 3]
[4, 5, 6]
[7, 8, 9]
[10]

Show source

/*
 *  call-seq:
 *    e.each_slice(n) {...}
 *    e.each_slice(n)
 *
 *  Iterates the given block for each slice of <n> elements.  If no
 *  block is given, returns an enumerator.
 *
 *  e.g.:
 *      (1..10).each_slice(3) {|a| p a}
 *      # outputs below
 *      [1, 2, 3]
 *      [4, 5, 6]
 *      [7, 8, 9]
 *      [10]
 *
 */
static VALUE
enum_each_slice(obj, n)
    VALUE obj, n;
{
    long size = NUM2LONG(n);
    VALUE args[2], ary;

    if (size <= 0) rb_raise(rb_eArgError, "invalid slice size");
    RETURN_ENUMERATOR(obj, 1, &n);
    args[0] = rb_ary_new2(size);
    args[1] = (VALUE)size;

    rb_block_call(obj, SYM2ID(sym_each), 0, 0, each_slice_i, (VALUE)args);

    ary = args[0];
    if (RARRAY_LEN(ary) > 0) rb_yield(ary);

    return Qnil;
}

August 23, 2008

0 thanks

Needs requiring 'enumerator' to work

This method needs that you

require 'enumerator'

for this method to be available.

enum_slice

Related methods

Needs requiring 'enumerator' to work

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