二進制搜索樹語法

Question

對於JS中二進制搜索樹實現的這一部分，引用“ this._root”的意義是什么？ （為什么他們不能說“ this.root”）？ 有關此鏈接，請訪問http://www.nczonline.net/blog/2009/06/16/computer-science-in-javascript-binary-search-tree-part-2/

BinarySearchTree.prototype = {

    //more code here

    remove: function(value){

        var found       = false,
            parent      = null,
            current     = this._root,
            childCount,
            replacement,
            replacementParent;

        //make sure there's a node to search
        while(!found && current){

            //if the value is less than the current node's, go left
            if (value < current.value){
                parent = current;
                current = current.left;

            //if the value is greater than the current node's, go right
            } else if (value > current.value){
                parent = current;
                current = current.right;

            //values are equal, found it!
            } else {
                found = true;
            }
        }

        //only proceed if the node was found
        if (found){
            //continue
        }

    },

    //more code here

};

Answer 1

他們可能試圖指示不應在對象外部（其他語言的private變量）訪問此變量。

Python有一個嚴格的約定，即使用以下划線字符開頭的名稱來表示此字段或方法是私有的。 作者可能正在嘗試將相同的約定應用於javascript。

Answer 2

我想更完整的示例位於此處： https ： //github.com/nzakas/computer-science-in-javascript/blob/master/data-structures/binary-search-tree/binary-search-tree.js

關於this._root我認為這只是作者的決定，沒有任何特殊含義。