遍历数组以检查字符串是否```包含```另一个字符串

Question

using the includes method to check whether strings in an array include another string. Basically like a search function type of thing.

Heres what I have so far

this.findIngredient = function(ingredientName) {
          for (i=0; i < this.ingredients.length; i++) {
               if (this.ingredients[i].includes(ingredientName)) {
                     return true
                     break
                 } else {
                    return false
                   }
                }
            }

what im unsure about is why when the this.ingredient does hold a string that includes ingredientName it still outputs false .

For context this is the this.ingredient array

this.ingredients = ["500g plain flour", "1 tsp fine salt", "2 heaped tsp baking powder"]

Answer 1

Removing the else block from within your loop should resolve the issue.

Explanation -

The else block is run when this.ingredients[i].includes(ingredientName) is false . And in your code, when the else block returns false which means your loop will not have the opportunity to check every element in the ingredients array since the function will stop execution when it sees a return statement.