What does _.keys({one: 1, two: 2, three: 3}) return?
A). [1, 2, 3]
B). ['one', 'two', 'three']
C). ['1', '2', '3']
D). [1, 2, 'three']
Which function is used to clone an object in Underscore.js?
A). _.extend
B). _.clone
C). _.map
D). _.filter
What does the _.filter function do in Underscore.js?
A). Iterates over a list of elements
B). Creates a new array with transformed values
C). Filters values in a list
D). Reduces the list to a single value
How do you debounce a function in Underscore.js to limit the rate at which it can fire?
A). _.throttle
B). _.debounce
C). _.delay
D). _.once
What does the _.each function do in Underscore.js?
A). Iterates over a list of elements
B). Creates a new array with transformed values
C). Filters values in a list
D). Reduces the list to a single value
How do you generate a random number within a range in Underscore.js?
A). _.random
B). _.range
C). _.shuffle
D). _.sample
How do you flatten a nested array using Underscore.js?
A). _.map
B). _.flatten
C). _.filter
D). _.reduce
What does _.pluck([{a: 1}, {a: 2}, {a: 3}], 'a') return?
A). [1, 2, 3]
B). [1, 2]
C). [2, 3]
D). [3, 1]
How can you invoke a function a specified number of times in Underscore.js?
A). _.times
B). _.invoke
C). _.repeat
D). _.cycle
What does _.omit({name: 'Alice', age: 25, location: 'NY'}, 'age') return?
A). {name: 'Alice', location: 'NY'}
B). {age: 25}
C). {name: 'Alice', age: 25}
D). {location: 'NY'}