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https://issues.apache.org/jira/browse/TINKERPOP-1632?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188415#comment-16188415
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Marko A. Rodriguez commented on TINKERPOP-1632:
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Here are two concepts we will have to deal with.
1. Manipulating numbers directly. (e.g. {{math(add).by(3)}})
2. Manipulating numbers indirectly. (e.g. {{math(add).by("a")}})
For predicates we have two types of steps: {{is()}} (direct) and {{where()}}
(indirect). I do not like this distinction and something we should rectify in
TinkerPop4. For instance, {{is(var("a"))}} vs. {{is("a")}}. Do we go down the
route of having two types of {{math()}} functions? I don't think we should do
that. Thus, how do we distinguish the string "a" and the variable "a" ?
> Create a set of default functions
> ---------------------------------
>
> Key: TINKERPOP-1632
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1632
> Project: TinkerPop
> Issue Type: Improvement
> Components: process
> Affects Versions: 3.3.0
> Reporter: Daniel Kuppitz
>
> We already have a a set of default BiFunctions / operators, that are not
> treated as lambdas. We should also have a bunch of simple functions, that can
> then be used in {{map()}} or {{sack()}} and that can be serialized as
> bytecode. For example:
> {noformat}
> ...map(sqrt)
> ...map(log)
> ...sack(sigmoid) // compute sigmoid of the current sack and update the
> sack
> ...sack(cos).by("x") // compute the cosine of the current element's "x" and
> assign / overwrite the current sack value
> {noformat}
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