urbit/base/pub/doc/hoon/runes/ts/tsls.md

tislus, =+, %tsls

Push on

=+ is a synthetic rune that pushes p on the subject and sends it to q. =+ is the inverse of =-. Use =+ when your p isn't too long and =+ makes for more readable code.

See also

tishep, =-, %tshp

Produces

Twig: [%tsls p=twig q=twig]

Sample

p and q are twigs.

Tall form

=+  p
    q

Wide form

=+(p q)

Irregular form

None

Examples

~zod/try=> 
    =+  a=1
    a
1

The simplest case of a =+, we push a=1 on to our subject, and produce a.

~zod/try=> 
=cor  |=  a=@
      =+  b=1
      =+  c=2
      :(add a b c)
new var %cor
~zod/try=> 
(cor 0)
3

This is a common case of =+, when we need to add intermediate values to our subject to divide up our computation. =+ makes for procedural, top to bottom code organization.