Strange behavior for Map, parseInt
functional-programming, javascript
Solution
`parseInt` receives two arguments: string and radix:
`var intValue = parseInt(string[, radix]);`
while `map` handler's second argument is index:
... callback is invoked with three arguments: the value of the element, the index of the element, and the Array object being traversed.
Problem
Possible Duplicate: javascript - Array.map and parseInt I saw this example of strange JavaScript behavior on twitter ``` ['10','10','10','10','10'].map(parseInt) ``` evaluates to ``` [10, NaN, 2, 3, 4] ``` could somebody explain this behavior? I verified it in chrome and firebug ``` ['10','10','10','10','10'].map(function(x){return parseInt(x);}) ``` correctly returns an array of 10s as integers. Is this an improper use of map(), a bug with parseInt, or something else?