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    <p>This is some experimental code that i just came up with and its native javascript.</p> <p><strong>First Define a function that compares two arrays.</strong></p> <pre><code>function compareArrays( val_one, val_two ) { var arr_one = val_one, arr_two = val_two; if ( arr_one.length !== arr_two.length ) return false; for ( var i = 0; i &lt; arr_one.length; i++ ) { if( arr_one[i] !== arr_two[i] ) return false; } return true; } </code></pre> <p>**Also define a function that merges two objects</p> <pre><code>function mergeObjects( obj_1, obj_2 ) { var a = obj_1, b = obj_2; for ( prop in b ) { if ( !a[prop] ) { a[prop] = b[prop]; } else if ( prop === 'encounter_bits' ) { a[prop]['rarity'] += b[prop]['rarity']; } } return a; } </code></pre> <p><strong>Let us traverse our array</strong></p> <pre><code>for ( var i=0; i&lt;arr.length; i++ ) { // loop over the array that holds objects. if(arr[i] !== null){ // if object has not been used var _min = arr[i].encounter_bits.min_level, _max = arr[i].encounter_bits.max_level, _con = arr[i].encounter_bits.conditions; //create variables that hold values you want to compare for ( var c = 0; c &lt; arr.length; c++ ) { /* create an inner loop that will also traverse the array */ if ( c !== i &amp;&amp; arr[c] !== null ) { // if inner loop is not on current loop index if ( _min === arr[c].encounter_bits.min_level &amp;&amp; _max === arr[c].encounter_bits.max_level &amp;&amp; compareArrays(_con, arr[c].encounter_bits.conditions) ) { var newObject = mergeObjects(arr[i], arr[c]); arr[i] = newObject; arr[c] = null; } } } } } </code></pre> <p>Please let me know if it works.</p>
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