90% failed to answer these tricky javascript snippets

Vineet Mishra

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Jan 9, 2023

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Q1. Guess the output

var x=0
x++
x=’vineet’
x=true
console.log(`Value of x ${x} ,\n type of x ${typeof(x)}`)

Take a breath, Don’t jump into solution

Output: 
Value of x true ,
 type of x boolean

Q2. Guess the output

const compact = arr => console.log(arr.filter(Boolean));
compact([0, 1, false, 2, ‘’, 3, ‘a’, ‘e’ * 23, NaN, ‘s’, 34])

Take a breath, Don’t jump into solution

Output:
[ 1, 2, 3, 'a', 's', 34 ]