if you execute this statement, the result will be [10, NaN, 2, 3]. Why? But if you use parseFloat instead of parseInt, you will get the list of numbers. I can't really explain why this is happening. But you can use this one as a replacement:
["10", "10", "10", "10"].map(function(x){ return parseInt(x); })
whoa, you're right. Can someone explain what is happening?
I usually write map functions like this
["10", "10", "10", "10"].map(item => parseInt(item));
and that does indeed return [10, 10, 10, 10].
passing just parseInt as a callback.. how does it know what arguments to take?
This answer on StackOverflow gives the correct reasoning: stackoverflow.com/a/262511/910328
Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink.
Hide child comments as well
Confirm
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
if you execute this statement, the result will be [10, NaN, 2, 3]. Why?
But if you use parseFloat instead of parseInt, you will get the list of numbers.
I can't really explain why this is happening. But you can use this one as a replacement:
whoa, you're right. Can someone explain what is happening?
I usually write map functions like this
and that does indeed return [10, 10, 10, 10].
passing just parseInt as a callback.. how does it know what arguments to take?
This answer on StackOverflow gives the correct reasoning: stackoverflow.com/a/262511/910328