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Array.prototype.locate = function( value, pos ) { pos = pos || []; for( var i = this.length; --i >= 0; ) { if (this[i] === value) { return pos.push(i); } else if ( Object.prototype.toString.call( this[i] ) === '[object Array]' ) { pos.push(i); if ( this[i].locate( value, pos ) ) { return pos; } else { pos.pop(); } } } return false; }

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