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\$\begingroup\$ Why is arg1 ⁵ rather than ³? \$\endgroup\$

caird coinheringaahing
– caird coinheringaahing ♦

2021-03-26 22:09:01 +00:00
Commented Mar 26, 2021 at 22:09
2

\$\begingroup\$ @ChartZBelatedly - Er, it's a bit non-intuitive at first... Husk program arguments are numbered in reverse, using even numbers starting at zero: so with 3 program args, arg1 is 4, arg2 is 2, and arg3 is 0. But... if we use the odd numbers, then an additional copy is automatically added to the end of the program (so that we don't need to waste a character specifying it twice). So, in this case, arg3 and arg1 are both appended to the end of the program to be used by X (and so use odd-numbered indices), and arg2 is only used once (so gets the even-numbered index). \$\endgroup\$

Dominic van Essen
– Dominic van Essen

2021-03-26 22:13:25 +00:00
Commented Mar 26, 2021 at 22:13
\$\begingroup\$ @ChartZBelatedly - probably a better explanation here \$\endgroup\$

Dominic van Essen
– Dominic van Essen

2021-03-26 22:15:34 +00:00
Commented Mar 26, 2021 at 22:15

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