2m: Container from Noun

+ly

List from raw noun

Takes a null-terminated noun and produces a +list.

Accepts

.a is a null-terminated noun.

Produces

A +list.

Source

    ++  ly
      le:nl

Examples

    > (ly [1 2 3 ~])
    ~[1 2 3]

    > (ly "abc")
    ~['a' 'b' 'c']

Discussion

+ly is an alias for +le:nl.

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+my

Map from raw noun

Takes a null-terminated noun and produces a +map.

Accepts

.a is a noun composed of ordered pairs and terminated with ~.

Produces

A +map.

Source

    ++  my
      my:nl

Examples

    > (my [['a' 1] ['b' 2] ~])
    [n=[p='b' q=2] l={[p='a' q=1]} r={}]

Discussion

+my is an alias for +my:nl.

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+sy

Set from raw noun

Takes a null-terminated noun and produces a +set.

Accepts

.a is a null-terminated noun.

Produces

A +set.

Source

    ++  sy
      si:nl

Examples

    > (sy [1 2 3 ~])
    [n=2 l={1 3} r={}]

    > (sy (ly [1 2 3 ~]))
    [n=2 l={1 3} r={}]

    > (sy "abc")
    [n='b' l={'a' 'c'} r={}]

Discussion

+sy is an alias for +si:nl.

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+nl

Noun-to-container operations

Core whose arms contain functions that create various typed nouns from raw nouns.

Source

    ++  nl
      |%

---

+le:nl

Construct list

Takes a null-terminated noun and produces a +list.

Accepts

.a is a null-terminated noun.

Produces

A list.

Source

++  le
  |*  a=(list)
  ^+  =<  $
    |@  ++  $  ?:(*? ~ [i=(snag 0 a) t=$])
    --
  a

Examples

    > (le:nl [1 2 3 ~])
    ~[1 2 3]

    > (le:nl "abc")
    ~['a' 'b' 'c']

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+my:nl

Construct map

Takes a null-terminated noun and produces a +map of the same type of the .p and .q passed in.

Accepts

.a is a noun composed of ordered pairs and terminated with ~.

Produces

A map.

Source

++  my
  |*  a=(list (pair))
  =>  .(a ^+((le a) a))
  (~(gas by `(map _p.i.-.a _q.i.-.a)`~) a)

Examples

    > (my:nl [['a' 1] ['b' 2] ~])
    [n=[p='b' q=2] l={[p='a' q=1]} r={}]

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+si:nl

Construct set

Takes a null-terminated noun and produces a +set.

Accepts

.a is a null-terminated noun.

Produces

A set.

Source

++  si
  |*  a=(list)
  =>  .(a ^+((le a) a))
  (~(gas in `(set _i.-.a)`~) a)

Examples

    > (si:nl `(list [@t *])`[['a' 1] ['b' [2 3]] ~])
    [n=['b' [2 3]] l={['a' 1]} r={}]

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+snag:nl

Index

Produces the element at the index .a of null-terminated noun .b and failing if the noun is null. Lists are 0-indexed.

Accepts

.a is a noun.

.b is a null-terminated noun.

Produces

A noun.

Sources

++  snag
  |*  [a=@ b=(list)]
  ?~  b
    ~_  leaf+"snag-fail"
    !!
  ?:  =(0 a)  i.b
  $(b t.b, a (dec a))

Examples

    > =b [[2 3] [1 4] ~]
    > (snag:nl 0 b)
    [2 3]

    > (snag:nl 2 b)
    ! snag-fail
    ! exit

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+weld:nl

Concatenate

Produces a list that is the concatenation of null-terminated nouns .a and .b.

Accepts

.a is a null-terminated noun.

.b is a null-terminated noun.

Produces

A list.

Source

++  weld
  |*  [a=(list) b=(list)]
  =>  .(a ^+((le a) a), b ^+((le b) b))
  =+  42
  |-
  ?~  a  b
  [i=i.a t=$(a t.a)]

Examples

    > =b [[2 3] [1 4] ~]

    > (weld:nl b [8 9 ~])
    [i=[2 3] t=[i=[1 4] t=~[8 9]]]

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