AppendTo

Appends an element to a bound variable's value, and reassigns it in place.

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AppendTo(s, elem)Reads $s$'s current value, appends $elem$, reassigns $s$ to the result, and returns it.

Typed signatures

Type	Package	Applies
(symbol, any) -> any	combinatorics	always

Domain: Collections

Details

• $s$ is held — its NAME, not its value, is the first operand — so it can be reassigned. Works for any symbol already carrying a value (via a plain assignment, or a Module local).

Examples

Basic #

bind a list, then append to it

live ↗

In$\bigl\lbrack\mathrm{appendToDemoList}\coloneq\bigl\lbrack1, 2, 3\bigr\rbrack, \mathrm{AppendTo}(\mathrm{appendToDemoList}, 4)\bigr\rbrack$Out$\bigl\lbrack\bigl\lbrack1, 2, 3\bigr\rbrack, \bigl\lbrack1, 2, 3, 4\bigr\rbrack\bigr\rbrack$

Applications #

live ↗

In$\mathrm{AppendTo}(m, \bigl\lbrack a, b\bigr\rbrack)$Out$\mathrm{AppendTo}(m, \bigl\lbrack a, b\bigr\rbrack)$

About

Examples	2
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See also: Module