Swift 2.0 Learning Notes (day 14)-INSERT, delete, and replace strings

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The corresponding mutable string can be inserted, deleted, and replaced, and string provides several ways to help implement these operations. These methods are as follows:

Splice (_:atindex:). Inserts a string at the index position.

Insert (_:atindex:). Inserts a character at the index position.

Removeatindex (_:). Deletes a character at the index location.

RemoveRange (_:). Deletes a string within the specified range.

Replacerange (_:, with:string). Replaces a string in a specified range with a string or character.

Code:

var str = "Swift"

Print ("Raw string: \ (str)")

Str.splice ("Objective-c and". Characters, AtIndex:str.startIndex)

Print ("After inserting string: \ (str)")

Str.insert (".", AtIndex:str.endIndex)

Print ("insert. Word specifier: \ (str)")

Str.removeatindex (Str.endIndex.predecessor ())

Print ("delete. Word specifier: \ (str)")

var startIndex = Str.startindex

var endIndex = advance (StartIndex, 9)

var range = Startindex...endindex

Str.removerange (Range)

Print ("After delete range: \ (str)")

StartIndex = Str.startindex

EndIndex = advance (startIndex, 0)

Range = Startindex...endindex

Str.replacerange (range, with: "C + +")

Print ("Replace range: \ (str)")

Output Result:

Original string: Swift

After inserting a string: Objective-c and Swift

Insert. Word specifier: objective-c and Swift.

Delete. Word specifier: objective-c and Swift

After the scope is deleted: C and Swift

After replace range: C + + and Swift

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Swift 2.0 Learning Notes (day 14)-INSERT, delete, and replace strings