note

substring slice substr charAt includes startsWith endsWith repeat padStart padEnd

start index number からend index number(-1)までをnewStringとして返す。substringとsliceの違いは引数Endの値がMinusの時挙動が変わること ...
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learn-slice-substring-substr

Description: From this lesson, we begin to learn about String objects. First of all, we have a look at the attributes of String: length. Use StringObject.length to ...