What will happen in the console / Parsing ['1', '2', '3'].map(parseInt)
A friend of mine (Sasha, hi!) gave me this problem to solve. Take a look at this single line of code and try your hand at being a JavaScript engine. What will be the output?
['1', '2', '3'].map(parseInt); // ?
So, let's check? Drumroll:
[1, NaN, NaN]
If your answer matches, feel free to turn off this video. I have nothing new to tell you. But if the answer doesn't match, let's figure it out.
Contents:
00:00 Problem Statement
00:39 Writing the Code
01:35 Checking the Answer
02:49 The ParseInt Method
03:56 The Map Method
05:20 Examining the Code
06:43 Problem Found
08:19 Summary
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