JavaScript数组reduce（）累加器为空

Question

我正在拆分一个单词，并将每个单独的元素转换为莫尔斯电码。但是，返回值为空。不知道我在做什么错。

CREATE TABLE employee (
  id          NUMBER(10,0) PRIMARY KEY,
  name        VARCHAR2(100),
  designation VARCHAR2(10),
  idIfManager NUMBER(10,0) GENERATED ALWAYS AS (
                  CASE DESIGNATION WHEN 'MANAGER' THEN id END
                ) VIRTUAL
                CONSTRAINT employee__idIfManager__u UNIQUE
)
/

CREATE TABLE manager_details (
  id     NUMBER(10,0)
         PRIMARY KEY
         REFERENCES employee ( idIfManager ),
  name   VARCHAR2(100),
  salary NUMBER(12,2)
)
/

Answer 1

total + morseAlphabet[currentLetterIndex];

您正在寻找

total += morseAlphabet[currentLetterIndex];

https://www.w3schools.com/js/js_assignment.asp