JavaScriptの文字列メソッドと小道具

"abc".length
> 3

"abc".indexOf("b")
> 1

"abc".indexOf("i")
> -1

"abc".indexOf("")
> 0

"abcb".lastIndexOf("b")
> 3

"abcb".lastIndexOf("i")
> -1

"abcb".lastIndexOf("")
> 4

"abc".search("b")
> 1

"abc".search("i")
> -1

"abc".search("")
> 0

"abc".slice("1")
> "bc"

"abc".slice("5")
> ""

"abc".slice("")
> "abc"

"abc".substring("1")
> "bc"

"abc".substring("5")
> ""

"abc".substring("")
> "abc"

"abc".replace("a","e")
>> "ebc"

"abc".toUpperCase()
>> "ABC"

"ABC".toLowerCase()
>> "abc"

"ABC".concat(",", "b")
>> "ABC,b"

"  ABC abc  ".trim()
>> "ABC abc"

"  ABC abc  ".charAt(4)
>> "C"

"  ABC abc  ".charCodeAt(4)
>> 67

"a,b,c".split(",")
>> ["a", "b", "c"]

"a b c".split(" ")
>> ["a", "b", "c"]

"a b c".split("")
>> ["a", " ", "b", " ", "c"]