Using contra, asynchronously find a value in a collection that matches a condition.
var λ = require('contra');
var find = require('contra-find');
var items = [
[1, 2],
[2, 3],
[3, 4],
[4, 5],
[5, 6]
];
find(λ, items, function(item, next){
console.log('item :', item);
process.nextTick(function(){
console.log('check:', item);
next(undefined, item[0] === 3);
});
}, function(err, item){
console.log('item found!', item);
});output
item : [ 1, 2 ]
check: [ 1, 2 ]
item : [ 2, 3 ]
check: [ 2, 3 ]
item : [ 3, 4 ]
check: [ 3, 4 ]
item found! [ 3, 4 ]
Notice that it iterates in series and stops as soon as the item is found.
MIT