Given input: // could be potentially more than 3 keys in the object above items = [ {color: 'red', type: 'tv', age: 18}, {color: 'silver', type: 'phone', age: 20} ... ] excludes = [ {k: 'color', v: 'silver'}, {k: 'type', v: 'tv'}, .... ] function excludeItems(items, excludes) { excludes.forEach(pair => { items = items.filter(item => item[pair.k] === item[pair.v]); }); return items; } 1. Describe what this function is doing... 2. What is wrong with that function ? 3. How would you optimize it ?
Why do you want to work at Costco?
What are your greatest technical strengths?
// Given var endorsements = [ { skill: 'css', user: 'Bill' }, { skill: 'javascript', user: 'Chad' }, { skill: 'javascript', user: 'Bill' }, { skill: 'css', user: 'Sue' }, { skill: 'javascript', user: 'Sue' }, { skill: 'html', user: 'Sue' } ]; getSkills = (endorsements) => { // Result // [ // { skill: 'javascript', user: ['Chad', 'Bill', 'Sue'], count: 3 }, // { skill: 'css', user: ['Sue', 'Bill'], count: 2 }, // { skill: 'html', user: ['Sue'], count: 1 } // ]; } see this image: http://i.imgur.com/UIeB3n4.png
Write an emitter class: /* emitter = new Emitter(); // 1. Support subscribing to events. sub = emitter.subscribe('event_name', callback); sub2 = emitter.subscribe('event_name', callback2); // 2. Support emitting events. // This particular example should lead to the `callback` above being invoked with `foo` and `bar` as parameters. emitter.emit('event_name', foo, bar); // 3. Support unsubscribing existing subscriptions by releasing them. sub.release(); // `sub` is the reference returned by `subscribe` above */
What are the 5 rights of merchandising?
You are given an array of N elements in the form "property1: value1; property2: value2;...;propertyX: valueX;" for some some N and any X. There is also another array of M elements of the form "property: value". You are supposed to write an algorithm to remove every element in the N length array that has a "property: value" pair in the M length array. The trick is that the most intuitive solution of iterating through the M array and filtering the N array at each element is already written. You must come up with a solution that solves the problem in less than O(NM) time.
How many hours can you work a week?
// How can I know which radio was clicked or selected? <h2>Monstrous Government Form</h2> <form id="myForm" name="myForm"> <fieldset> <legend>Do you live in an:</legend> <p><input type="radio" name="home" value="apartment" id="apartment" /> <label for="apartment">Apartment</label></p> <p><input type="radio" name="home" value="house" id="house" /> <label for="house">House</label></p> <p><input type="radio" name="home" value="mobile" id="mobile" /> <label for="mobile">Mobile Home/Trailer</label></p> <p><input type="radio" name="home" value="coop" id="coop" /> <label for="coop">Co-op</label></p> <p><input type="radio" name="home" value="none" id="none" /> <label for="none">None</label></p> </fieldset> <fieldset> <legend>Your income is:</legend> <p><input type="radio" name="inc" value="0-50K" id="0-50K" /> <label for="0-50K">$0-50,000 USD</label></p> <p><input type="radio" name="inc" value="50-100K" id="50-100K" /> <label for="50-100K">$50,000-100,000 USD</label></p> <p><input type="radio" name="inc" value="100K+" id="100K+" /> <label for="100K+">$100,000+ USD</label></p> </fieldset> <fieldset> <legend>Your status is:</legend> <p><input type="radio" name="status" value="single" id="single" /> <label for="single">single</label></p> <p><input type="radio" name="status" value="married" id="married" /> <label for="married">married</label></p> <p><input type="radio" name="status" value="partner" id="partner" /> <label for="partner">domestic partner</label></p> </fieldset> <p>This form goes on with another 97 questions....</p> <input type="submit" value="Submit" /> </form>
If you have 500 revisions of a program, write a program that will find and return the FIRST bad revision given a isBad(revision i) function.
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