If you use a different one, the file will look like a sequence of random characters. But another problem came up! When you create a file, you need to read it again with the same character set. Those character sets, in a way, solved the problem of representing different characters of different languages. Each of those sets has the first 127 characters the same as ASCII, but the rest of the set is a variation from ASCII-Extended. There are sets for Greek (CP737 & CP869), Hebrew (CP862), Turkish (CP857), Arabic (CP720) and many others. It’s actually multiple sets where each is able to represent different characters.
Unlike ASCII, ANSI’s not a single character set. Which is also the name of the entity that created this standard.
So another standard came out, called ANSI. Then, Extended ASCII came along, which used the remaining 128 values representable by a single byte.īut that didn’t work for many languages that had different character sets.
#Convert string to lowercase in swift code
Custom String interpolation and how you can use it to initialize a custom object from a string or convert it to a stringĬharacter representation has changed so much over the years, starting from ASCII (American Standard Code for Information Interchange), which represents English numbers and characters using up to seven bits.What a substring is and how it relates to memory.What string folding is and how you can best search in strings.Ordering of strings in different locales.How Swift works with UTF encodings, and how low-level details of UTF affect String’s performance.The binary representation of characters, and how it developed over the years.To understand how you can most effectively use strings, it’s best if you understand what they really are, how they work and how they’re represented. Almost every major release of Swift has refined the String type to the awesome design we have today. The design is a delicate balance between Unicode correctness, encoding agnosticism, ease-of-use and high-performance. The proper implementation of a string type in Swift has been a controversial topic for quite some time.
#Convert string to lowercase in swift full
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