String.fromCharCodes constructor
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,
]);