Javascript通过元素名删除数组中该元素

Array.prototype.remove = function (val) {
    var index = this.indexOf(val);
    if (index > -1) {
        this.splice(index, 1);
    }
}
 
var arr = ['apple', 'banana', 'orange', 'pear']
 
arr.remove('banana')
 
console.log(arr)    // ['apple', 'orange', 'pear']

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