['1', '7', '11'].map(parseInt);I surprisingly saw the result [1, NaN, 3] instead of [1, 7, 11]. But if we try parseFloat
['1', '7', '11'].map(parseFloat);the result is correct [1, 7, 11]
If we try the extended form of parseInt
['1', '7', '11'].map(i => parseInt(i));we get the proper outcome as well.
So why is it so messy with the short parseInt?