Amend: Difference between revisions
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* <code>x</code> is an array to amend |
* <code>x</code> is an array to amend |
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* <code>y</code> is the index(or indices) to amend |
* <code>y</code> is the index(or indices) to amend |
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* <code> |
* <code>f</code>(optional), is the function to apply to those indices |
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* <code> |
* <code>z</code> is the second argument to <code>z</code> |
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3 argument amend always acts as an element replacement function, since <code>z</code> is [[right|<code>:</code>]] if it is omitted. |
3 argument amend always acts as an element replacement function, since <code>z</code> is [[right|<code>:</code>]] if it is omitted. |
Revision as of 08:04, 2 June 2022
Amend
@[x;y[;f];z]
@[x;y;f[;z]]
@[x;y;f[;z]]
Amend is a special form of the @
verb which takes multiple arguments.
Amend takes 3 or 4 arguments, where:
x
is an array to amendy
is the index(or indices) to amendf
(optional), is the function to apply to those indicesz
is the second argument toz
3 argument amend always acts as an element replacement function, since z
is :
if it is omitted.
x
can be a value or a symbol. If given a symbol, amend will modify the variable that is indicated by the symbol.
v:1 2 3 v 1 2 3 @[v;1;3] 1 3 3 v 1 2 3 @[`v;1;3]; v 1 3 3
ngn/k
ngn/k's amend has z
as the optional argument, instead of having f
as an optional argument.