Invert scale function

Question

This is interesting to me. Look at the following D3 code:

var scale = d3.scale.linear()     .domain([100, 500])     .range([10, 350]);  scale(100);  //Returns 10 scale(300);  //Returns 180 scale(500);  //Returns 350 

Is there a function that inverse of scale? For example,

inverseScale(10);   //Returns 100 inverseScale(180);  //Returns 300 inverseScale(350);  //Returns 500 

Answer 1

Yes, there is, and it's aptly named invert.

console.log(scale.invert(10));   //Returns 100 console.log(scale.invert(180));  //Returns 300 console.log(scale.invert(350));  //Returns 500