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Contents
"use strict";
var reducible = require("reducible/reducible")
var reduce = require("reducible/reduce")
var isError = require("reducible/is-error")
var end = require("reducible/end")
function dropWhile(source, predicate) {
/**
Returns a sequence of the items in `source` starting from the first
item for which `predicate(item)` returns `false`.
## Example
var numbers = dropWhile([ 2, 7, 10, 23 ], function(value) {
return value < 10
})
print(numbers) // => < 10 23 >
**/
return reducible(function reduceDropWhile(next, initial) {
var dropped = false
reduce(source, function reduceDropWhileSource(value, result) {
// If value is end of collection or is an error (which also includes
// end of collection) just pass it through, `reducible` will take care
// of everything.
if (value === end) return next(value, result)
if (isError(value)) return next(value, result)
// If already dropped all the intended items (if `dropped` is already
// being set to `true` or if current predicate returns `false`). Then
// just keep on passing values.
if (dropped || (dropped = !predicate(value))) return next(value, result)
return result
}, initial)
})
}
module.exports = dropWhile
Version data entries
5 entries across 2 versions & 1 rubygems