spread ( objs... seq -- )

Factor handbook » The language » Combinators » Dataflow combinators » Spread combinators

Factor handbook » The language » Combinators » Dataflow combinators » Spread combinators

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Vocabulary

combinators

Inputs

Outputs

None

Word description

Applies each quotation to the object in turn.

Examples

The bi* combinator takes two values and two quotations; the tri* combinator takes three values and three quotations. The spread combinator takes n values and n quotations, where n is the length of the input sequence, and is essentially equivalent to a nested series of dips:

See also

bi*, tri*

Definition

combinators

Inputs

objs... | objects |

seq | a sequence of quotations with stack effect ( x -- ... ) |

Outputs

None

Word description

Applies each quotation to the object in turn.

Examples

The bi* combinator takes two values and two quotations; the tri* combinator takes three values and three quotations. The spread combinator takes n values and n quotations, where n is the length of the input sequence, and is essentially equivalent to a nested series of dips:

! Equivalent
{ [ p ] [ q ] [ r ] [ s ] } spread
[ [ [ p ] dip q ] dip r ] dip s

See also

bi*, tri*

Definition