concat
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2023-12-01
An optimized version of Sequence#concat that returns another ArrayLikeSequence if the argument is an array.
Signature
ArrayLikeSequence.concat = function(var_args) { /*...*/ }ArrayLikeSequence.concat = function concat(var_args) {
if (arguments.length === 1 && isArray(arguments[0])) {
return new IndexedConcatenatedSequence(this, (/** @type {Array} */ var_args));
} else {
return Sequence.prototype.concat.apply(this, arguments);
}
}| Name | Type(s) | Description |
|---|---|---|
| var_args | ...* |
Examples
Lazy([1, 2]).concat([3, 4]) // instanceof Lazy.ArrayLikeSequence Lazy([1, 2]).concat([3, 4]) // sequence: [1, 2, 3, 4]