time-to-botec

Benchmark sampling in different programming languages
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_getView.js (1024B)

      1 /* Built-in method references for those with the same name as other `lodash` methods. */
      2 var nativeMax = Math.max,
      3     nativeMin = Math.min;
      4 
      5 /**
      6  * Gets the view, applying any `transforms` to the `start` and `end` positions.
      7  *
      8  * @private
      9  * @param {number} start The start of the view.
     10  * @param {number} end The end of the view.
     11  * @param {Array} transforms The transformations to apply to the view.
     12  * @returns {Object} Returns an object containing the `start` and `end`
     13  *  positions of the view.
     14  */
     15 function getView(start, end, transforms) {
     16   var index = -1,
     17       length = transforms.length;
     18 
     19   while (++index < length) {
     20     var data = transforms[index],
     21         size = data.size;
     22 
     23     switch (data.type) {
     24       case 'drop':      start += size; break;
     25       case 'dropRight': end -= size; break;
     26       case 'take':      end = nativeMin(end, start + size); break;
     27       case 'takeRight': start = nativeMax(start, end - size); break;
     28     }
     29   }
     30   return { 'start': start, 'end': end };
     31 }
     32 
     33 module.exports = getView;