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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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9
Task/Apply-a-callback-to-an-array/M4/apply-a-callback-to-an-array.m4 Normal file
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define(`foreach', `pushdef(`$1')_foreach($@)popdef(`$1')')dnl
define(`_arg1', `$1')dnl
define(`_foreach', `ifelse(`$2', `()', `',
`define(`$1', _arg1$2)$3`'$0(`$1', (shift$2), `$3')')')dnl
dnl
define(`apply',`foreach(`x',$1,`$2(x)')')dnl
dnl
define(`z',`eval(`$1*2') ')dnl
apply(`(1,2,3)',`z')