lastIndexOf

public int lastIndexOf(string searchFor)

public int lastIndexOf(string searchFor, int endingIndex)

public int lastIndexOf(System.RegExp searchFor)

public int lastIndexOf(System.RegExp searchFor, int endingIndex)

The position of the last occurrence of the substring. -1 if the substring was not found.

The position of the last occurrence of the substring. This value will never exceed the ending index. -1 if the substring was not found.

The last position the regular expression matches at. -1 if the regular expression failed to match anything.

The last position the regular expression matches at. This value will never exceed the ending index. -1 if the regular expression failed to match anything.

Parameters

searchFor

The substring to get the last index of.

Parameters

searchFor

The substring to get the last index of.

endingIndex

The index to end searching for the substring at.

Parameters

searchFor

The regular expression to match.

Parameters

searchFor

The regular expression to match.

endingIndex

The index to end searching for the substring at.

Gets the last position a substring occurs at.

lastIndexOf will return -1 if the substring could not be found.

Gets the last position a substring occurs at, up to a certain ending index.

lastIndexOf will return -1 if the substring could not be found.

Gets the last position a regular expression matches at.

lastIndexOf will return -1 if the regular expression could not match.

Gets the last position a regular expression matches at, up to a certain ending index.

lastIndexOf will return -1 if the regular expression could not match.

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import System;   string message = "The quick brown fox jumped again and again."; Console.log(message.indexOf("again"));       // 27, first index of "again" Console.log(message.lastIndexOf("again"));   // 37, last index of "again" Console.log(message.lastIndexOf("hound"));   // -1, substring could not be found

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import System;   string message = "The quick brown fox jumped again and again."; Console.log(message.indexOf("again", 30));       // 27 Console.log(message.lastIndexOf("again", 40));   // 37 Console.log(message.lastIndexOf("hound", 30));   // -1

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import System;   string message = "The quick brown fox jumped again and again."; Console.log(message.lastIndexOf(/AGAIN/i));       // 37 Console.log(message.lastIndexOf(/again(?!\.)/));  // 27 Console.log(message.lastIndexOf(/aaa/));          // -1

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import System;   string message = "The quick brown fox jumped again and again."; Console.log(message.lastIndexOf(/AGAIN/i, 30));       // 27 Console.log(message.lastIndexOf(/AGAIN/i, 40));       // 37 Console.log(message.lastIndexOf(/again(?!\.)/, 40));  // 27 Console.log(message.lastIndexOf(/aaa/, 30));          // -1