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Array.p.select/reject

for Stage 1

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Array.p.filter is terribly named*

It does the wrong thing.

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*Personal opinions are my own

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“Filtering”

  • To filter, filtering, filtered
  • To remove, removing, removed

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“to remove by means of a filter”, from an actual dictionary

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What does filter do to the current item?

Meaning what does filter do when the predicate returns true:

  • If it removes the item, it’s “filtering out”
  • If it keeps the item, it’s “filtering in”

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What does filter do to the current item?

Meaning what does filter do when the predicate returns true:

  • If it removes the item, it’s “filtering out”
  • If it keeps the item, it’s “filtering in”

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What does filter do to the current item?

Meaning what does filter do when the predicate returns true:

  • If it removes the item, it’s “filtering out” (╯°□°）╯︵ ┻━┻
  • If it keeps the item, it’s “filtering in”

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Array.p.filter confuses me

every time

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Array.p.select

  • Array.p.select fixes this confusion.
  • If you return true, you are selecting the current item

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Array.p.reject

  • To allow the inverse without complicating the predicate
  • If you return true, you are rejecting the current item

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Why “select” and “reject”?

They make sense.

Precedence from Underscore/Lodash

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We even knew it when writing Array.p.filter’s spec text, 7.c.ii and 7.c.iii

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We even knew it when writing Array.p.filter’s spec text, 7.c.ii and 7.c.iii

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It just makes sense.

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As an alternative...

  • If can’t agree on adding an Array.p.select alias, we could drop it
  • Just add Array.p.reject
    • We could even name it Array.p.filterOut