take.js•1.44 kB
var _curry2 = require('./internal/_curry2');
var _dispatchable = require('./internal/_dispatchable');
var _xtake = require('./internal/_xtake');
var slice = require('./slice');
/**
* Returns the first `n` elements of the given list, string, or
* transducer/transformer (or object with a `take` method).
*
* Dispatches to the `take` method of the second argument, if present.
*
* @func
* @memberOf R
* @since v0.1.0
* @category List
* @sig Number -> [a] -> [a]
* @sig Number -> String -> String
* @param {Number} n
* @param {*} list
* @return {*}
* @see R.drop
* @example
*
* R.take(1, ['foo', 'bar', 'baz']); //=> ['foo']
* R.take(2, ['foo', 'bar', 'baz']); //=> ['foo', 'bar']
* R.take(3, ['foo', 'bar', 'baz']); //=> ['foo', 'bar', 'baz']
* R.take(4, ['foo', 'bar', 'baz']); //=> ['foo', 'bar', 'baz']
* R.take(3, 'ramda'); //=> 'ram'
*
* var personnel = [
* 'Dave Brubeck',
* 'Paul Desmond',
* 'Eugene Wright',
* 'Joe Morello',
* 'Gerry Mulligan',
* 'Bob Bates',
* 'Joe Dodge',
* 'Ron Crotty'
* ];
*
* var takeFive = R.take(5);
* takeFive(personnel);
* //=> ['Dave Brubeck', 'Paul Desmond', 'Eugene Wright', 'Joe Morello', 'Gerry Mulligan']
*/
module.exports = _curry2(_dispatchable('take', _xtake, function take(n, xs) {
return slice(0, n < 0 ? Infinity : n, xs);
}));