description

# String.fromCharCodes constructor

String.fromCharCodes(

1. Iterable<int> charCodes, [
2. int start = 0,
3. int? end

])

Allocates a new string containing the specified `charCodes`.

The `charCodes` can be both UTF-16 code units and runes. If a char-code value is 16-bit, it is used as a code unit:

    final string = String.fromCharCodes([68]);
    print(string); // D

If a char-code value is greater than 16-bits, it is decomposed into a surrogate pair:

    final clef = String.fromCharCodes([0x1D11E]);
    clef.codeUnitAt(0); // 0xD834
    clef.codeUnitAt(1); // 0xDD1E

If `start` and `end` are provided, only the values of `charCodes` at positions from `start` to, but not including, `end`, are used. The `start` and `end` values must satisfy `0 <= start <= end`. If `start` is omitted, it defaults to zero, the start of `charCodes`, and if `end` is omitted, all char-codes after `start` are included. If `charCodes` does not have `end`, or even `start`, elements, the specified char-codes may be shorter than `end - start`, or even empty.

## Implementation

    external factory String.fromCharCodes(
      Iterable<int> charCodes, [
      int start = 0,
      int? end,
    ]);