# In List§

See primary documentation
in context
for **routine pick**

multi pick(, * --> Seq)multi method pick(List: --> Seq)multi method pick(List: --> Mu)multi method pick(List: Callable --> Seq)

If `$count`

is supplied: Returns `$count`

elements chosen at random and without repetition from the invocant. If `*`

is passed as `$count`

, or `$count`

is greater than or equal to the size of the list, then all elements from the invocant list are returned in a random sequence; i.e. they are returned shuffled.

In *method* form, if `$count`

is omitted: Returns a single random item from the list, or Nil if the list is empty

Examples:

say <a b c d e>.pick; # OUTPUT: «b»say <a b c d e>.pick: 3; # OUTPUT: «(c a e)»say <a b c d e>.pick: *; # OUTPUT: «(e d a b c)»

As of the 2021.06 release of the Rakudo compiler, it is also possible to specify `**`

(aka `HyperWhatever`

) as the count.

In that case, `.pick`

will start picking again on the original list after it has been exhausted, again and again, indefinitely.

say <a b c>.pick(**).head(10); # OUTPUT: «((a c b c a b b c a b))»

# In role Baggy§

See primary documentation
in context
for **method pick**

multi method pick(Baggy: --> Any)multi method pick(Baggy: --> Seq)

Like an ordinary list pick, but returns keys of the invocant weighted by their values, as if the keys were replicated the number of times indicated by the corresponding value and then list pick used. The underlying metaphor for picking is that you're pulling colored marbles out a bag. (For "picking with replacement" see roll instead). If `*`

is passed as `$count`

, or `$count`

is greater than or equal to the total of the invocant, then `total`

elements from the invocant are returned in a random sequence.

Note that each `pick`

invocation maintains its own private state and has no effect on subsequent `pick`

invocations.

my = bag <eggs bacon bacon bacon>;say .pick; # OUTPUT: «eggs»say .pick(2); # OUTPUT: «(eggs bacon)»say .total; # OUTPUT: «4»say .pick(*); # OUTPUT: «(bacon bacon bacon eggs)»

# In enum Bool§

See primary documentation
in context
for **routine pick**

multi method pick(Bool: --> Bool)multi method pick(Bool: --> Seq)

Returns a random pick of `True`

and/or `False`

.

If it's called without an argument then it returns just one pick:

say Bool.pick; # OUTPUT: «True»

If it's called with a `$count`

of one then it returns a `Seq`

with just one pick:

say Bool.pick(1); # OUTPUT: «(False)»

If `$count`

is `*`

or greater than or equal to two then it returns a `Seq`

with *two* elements -- either `True`

then `False`

, or `False`

then `True`

:

say Bool.pick(*); # OUTPUT: «(False True)»

# In Range§

See primary documentation
in context
for **method pick**

multi method pick(Range: --> Any)multi method pick(Range: --> Seq)

Performs the same function as `Range.list.pick`

, but attempts to optimize by not actually generating the list if it is not necessary.

# In role Enumeration§

See primary documentation
in context
for **method pick**

multi method pick(::?CLASS:)multi method pick(::?CLASS: \n)multi method pick(::?CLASS: *)

It works on the defined class, selecting one element and eliminating it.

say Norse-gods.pick() for ^3; # OUTPUT: «ÞorFreijaOðin»

# In Any§

See primary documentation
in context
for **method pick**

multi method pick(--> Any)multi method pick( --> Seq)

Coerces the invocant to a `List`

by applying its `.list`

method and uses `List.pick`

on it.

my Range = 'α'..'ω';say .pick(3); # OUTPUT: «(β α σ)»

# In role Setty§

See primary documentation
in context
for **method pick**

multi method pick( = 1)

Returns `$count`

elements chosen at random (without repetition) from the set.

If `*`

is passed as `$count`

, or `$count`

is greater than or equal to the size of the set, then all its elements are returned in random order (shuffled).

# In role Mixy§

See primary documentation
in context
for **method pick**

method pick($?)

Throws an exception. The feature is not supported on the type, since there's no clear value to subtract from non-integral weights, to make it work.