escape_.escape(string) Escapes a string for insertion into HTML, replacing &, <, >, ", `, and ' characters. _.escape('Curly, Larry & Moe'); => "Curly, Larry &amp; Moe"

pick_.pick(object, *keys) Return a copy of the object, filtered to only have values for the whitelisted keys (or array of valid keys). Alternatively accepts a predicate indicating which keys to pick. _.pick({name: 'moe', age: 50, userid: 'moe1'}, 'name', 'age'); => {name: 'moe', age: 50} _.pick({name: 'moe', age: 50, userid: 'moe1'}, function(value, key, object) { return _.isNumber(value); }); => {age: 50}

compose_.compose(*functions) Returns the composition of a list of functions, where each function consumes the return value of the function that follows. In math terms, composing the functions f(), g(), and h() produces f(g(h())). var greet = function(name){ return "hi: " + name; }; var exclaim = function(statement){ return statement.toUpperCase() + "!"; }; var welcome = _.compose(greet, exclaim); welcome('moe'); => 'hi: MOE!'

value_.chain(obj).value() Extracts the value of a wrapped object. _.chain([1, 2, 3]).reverse().value(); => [3, 2, 1]

findIndex_.findIndex(array, predicate, [context]) Similar to _.indexOf, returns the first index where the predicate truth test passes; otherwise returns -1. _.findIndex([4, 6, 8, 12], isPrime); => -1 // not found _.findIndex([4, 6, 7, 12], isPrime); => 2

filter_.filter(list, predicate, [context]) Alias: select Looks through each value in the list, returning an array of all the values that pass a truth test (predicate). var evens = _.filter([1, 2, 3, 4, 5, 6], function(num){ return num % 2 == 0; }); => [2, 4, 6]

reduceRight_.reduceRight(list, iteratee, memo, [context]) Alias: foldr The right-associative version of reduce. Foldr is not as useful in JavaScript as it would be in a language with lazy evaluation. var list = [[0, 1], [2, 3], [4, 5]]; var flat = _.reduceRight(list, function(a, b) { return a.concat(b); }, []); => [4, 5, 2, 3, 0, 1]

every_.every(list, [predicate], [context]) Alias: all Returns true if all of the values in the list pass the predicate truth test. Short-circuits and stops traversing the list if a false element is found. _.every([2, 4, 5], function(num) { return num % 2 == 0; }); => false

pluck_.pluck(list, propertyName) A convenient version of what is perhaps the most common use-case for map: extracting a list of property values. var stooges = [{name: 'moe', age: 40}, {name: 'larry', age: 50}, {name: 'curly', age: 60}]; _.pluck(stooges, 'name'); => ["moe", "larry", "curly"]

min_.min(list, [iteratee], [context]) Returns the minimum value in list. If an iteratee function is provided, it will be used on each value to generate the criterion by which the value is ranked. Infinity is returned if list is empty, so an isEmpty guard may be required. var numbers = [10, 5, 100, 2, 1000]; _.min(numbers); => 2