Ruby--数组与字符串转换及去重

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1 字符串转数组

• split(",")

#字符串a
a = "12,34,56"
#数组a
a = a.split(",")
#a = ["12","34","56"]

2 数组转成字符串

• join(",")

#数组
a = ["12","34","56"]
#字符串
a = a.join(",")
#a = "12,34,56"

3 数组去重

• uinq

#数组
a = ["12","34","56","56"]
#去重
a = a.uniq
#a = ["12","34","56"]

4 字符串去重

#字符串
a = "12,34,56,56"
#转成数组,去重,转成字符串
a = a.split(",").uniq.join(",")

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