反转比例功能

Question

这对我很有意思.看下面的D3代码:

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

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

是否存在比例倒数的函数？例如,

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

Answer 1

是的,有,它的名字恰如其分invert.

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