wink-nlp/src/api/sel-filter.js

Developer friendly Natural Language Processing ✨

//     wink-nlp
//
//     Copyright (C) GRAYPE Systems Private Limited
//
//     This file is part of “wink-nlp”.
//
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//     person obtaining a copy of this software and
//     associated documentation files (the "Software"), to
//     deal in the Software without restriction, including
//     without limitation the rights to use, copy, modify,
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//     copies of the Software, and to permit persons to
//     whom the Software is furnished to do so, subject to
//     the following conditions:
//
//     The above copyright notice and this permission notice
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//     portions of the Software.
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//
// ## selFilter
/**
 * Filter for selection.
 * @param  {function} f             Predicate function to test each item of
 *                                  the array. Return true to select the item,
 *                                  false to reject or exclude.
 * @param  {number[]} selection     Array containing indexes to the selected items.
 * @param  {function} itemFn        Item function to create chainable-methods of the item.
 * @param  {function} colSelectedFn The function to create chainable-methods for
 *                                  the collection of selection, which are returned.
 * @return {object}                 Object containing the applicable chainable-methods.
 * @private
 */
var selFilter = function ( f, selection, itemFn, colSelectedFn ) {
  var filtered = [];
  for ( let k = 0; k < selection.length; k += 1 ) {
    if ( f( itemFn( selection[ k ] ), k ) ) filtered.push( selection[ k ] );
  }
  return colSelectedFn( filtered );
}; // selFilter()

module.exports = selFilter;