Identity function

[Siskin-Bot]

Submitted by: Ladislav

#626 already describes one identity function using unevaluated argument. However, my experience is telling that it is useful to have a similar function with evaluated argument.

identity: func [
    "Returns the value passed to it."
    value [any-type!]
] [
    :value
]

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^{Imported from: CureCode [ Version: r3 master Type: Wish Platform: All Category: Mezzanine Reproduce: Always Fixed-in:none ]
Imported from: metaeducation#1987}

Comments:

Rebolbot commented on Mar 7, 2013:

Submitted by: BrianH

It seems like it would be pretty rarely used, mostly as a function value in general transformation operations. Maybe giving it the full name IDENTITY would be more appropriate, both because it would be easier to remember what it does when seeing it in code, and as a Huffman-coding approach to names. If you don't see functions often it can be harder to read the code without having to backtrace or use HELP, so not abbreviating the name can make things easier. ID seems more like the name of a user function or variable.

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Rebolbot commented on Mar 7, 2013:

Submitted by: Ladislav

"Maybe giving it the full name IDENTITY would be more appropriate"

I am OK with that

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Rebolbot mentioned this issue on Jan 22, 2016:
[Epic] Holes in our evaluation model

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Rebolbot added the Type.wish on Jan 12, 2016

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[Oldes]

I'm closing it, because I cannot imagine why it should be used... In some very rare cases, it is so short, that one can define it in own script.