I am making the code of a function to find a value passed by parameter in a BinarySearchTree but it is not working for me and I don't know why.if the price is inside the tree I have to return true, if the price passed by parameter is less than or equal to 0 I have to return "error" and if it is not found I must return false this is my code.
BinarySearchTree.prototype.searchPrice = function (price) {
if (price <= 0) return "Error"
if(this.value === price) return true;
if(this.value < price) return this.right.searchPrice(price);
if(this.value > price) return this.left.searchPrice(price);
if(this.value === null) return false;
};
The issue might be that you have null check for this.value at the end which causes the
if(this.value < price) always to be true when this.value is null
Try to move the line if(this.value === null) return false; at the top and see if it works
UPDATE:
Also you need to add null checks for the this.left and this.right
BinarySearchTree.prototype.searchPrice = function (price) {
if (price <= 0) return "Error"
// move this line at the top like this
if(this.value === null) return false;
if(this.value === price) return true;
if(this.value < price) {
if(!this.right) {
return false;
}
return this.right.searchPrice(price);
}
if(this.value > price){
if(!this.left) {
return false;
}
return this.left.searchPrice(price);
}
};