charlike/templates/node_modules/core-js/modules/_to-index.js

Small, fast, simple and streaming project scaffolder for myself, but not only. Supports hundreds of template engines through the @JSTransformers API or if you want custom `render` function passed through options

var toInteger = require('./_to-integer')
  , max       = Math.max
  , min       = Math.min;
module.exports = function(index, length){
  index = toInteger(index);
  return index < 0 ? max(index + length, 0) : min(index, length);
};