--- /dev/null
+'use strict';
+var $export = require('./_export')
+ , toIObject = require('./_to-iobject')
+ , toInteger = require('./_to-integer')
+ , toLength = require('./_to-length')
+ , $native = [].lastIndexOf
+ , NEGATIVE_ZERO = !!$native && 1 / [1].lastIndexOf(1, -0) < 0;
+
+$export($export.P + $export.F * (NEGATIVE_ZERO || !require('./_strict-method')($native)), 'Array', {
+ // 22.1.3.14 / 15.4.4.15 Array.prototype.lastIndexOf(searchElement [, fromIndex])
+ lastIndexOf: function lastIndexOf(searchElement /*, fromIndex = @[*-1] */){
+ // convert -0 to +0
+ if(NEGATIVE_ZERO)return $native.apply(this, arguments) || 0;
+ var O = toIObject(this)
+ , length = toLength(O.length)
+ , index = length - 1;
+ if(arguments.length > 1)index = Math.min(index, toInteger(arguments[1]));
+ if(index < 0)index = length + index;
+ for(;index >= 0; index--)if(index in O)if(O[index] === searchElement)return index || 0;
+ return -1;
+ }
+});
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