haskey

haskey(collection, key) -> Bool

Determine whether a collection has a mapping for a given key.

Examples

julia> dict = Dict(["one"=> 1, "two"=> 2, "three"=> 3])
       haskey(dict, "one") 
true
julia> dict = Dict(["one"=> 1, "two"=> 2, "three"=> 3])
       haskey(dict, "1") 
false
julia> dict = ["A"=>1, "B"=>2];

julia> haskey(dict, "A")
true

julia> haskey(dict, 1)
false

See Also

append!, delete!, deleteat!, empty!, endof, filter, filter!, gc, get!, getkey, haskey, insert!, isempty, keys, map, map!, merge, merge!, pop!, prepend!, push!, reduce, resize!, shift!, splice!, unshift!, values,

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