Answer & Solution
Answer: Option C
Solution:
The _.filter function looks through each value in a list and returns an array of all the values that pass a truth test (predicate).
Q
What does the _.filter function do in Underscore.js?
Related Questions on Average
Which function can be used to delay the execution of a function in Underscore.js?
A). _.defer
B). _.delay
C). _.debounce
D). _.throttle
Which function is used to find unique elements in an array in Underscore.js?
A). _.first
B). _.last
C). _.uniq
D). _.filter
What is the output of _.last([1, 2, 3, 4, 5], 2)?
A). [1, 2]
B). [4, 5]
C). [5]
D). [3, 4, 5]
How can you invoke a function a specified number of times in Underscore.js?
A). _.times
B). _.invoke
C). _.repeat
D). _.cycle
What is the result of _.map([1, 2, 3], function(num) { return num * 3; })?
A). [1, 2, 3]
B). [3, 6, 9]
C). [2, 4, 6]
D). [3, 6, 9, 12]
What is the result of _.reduce([1, 2, 3], function(sum, num) { return sum + num; }, 0)?
A). 6
B). 5
C). 3
D). 2
What does _.identity(value) return?
A). null
B). undefined
C). The same value
D). A new value
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'}
How do you check if a value is an array in Underscore.js?
A). _.isObject
B). _.isArray
C). _.isArguments
D). _.isString
How do you generate a random number within a range in Underscore.js?
A). _.random
B). _.range
C). _.shuffle
D). _.sample