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## api-cheatsheet-array.md

      
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              April 2, 2018 12:25
                — forked from rauschma/api-cheatsheet-array.md
            
          
    Array<T>

Array<T>.prototype.*

concat(: (T | Array<T>)[]): T[]

concat(items) 🔒

Returns a new array that is the concatenation of this and all items. Non-array parameters are treated as if they were arrays with single elements.
ES3
['a'].concat('b', ['c', 'd']) → [ 'a', 'b', 'c', 'd' ]


copyWithin(:number, :number, ?:number): this