Just another update

Task/String-length/00DESCRIPTION

@@ -1,5 +1,13 @@
-In this task, the goal is to find the <em>character</em> and <em>byte</em> length of a string. This means encodings like [[UTF-8]] need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters. By ''character'', we mean an individual Unicode ''code point'', not a user-visible ''grapheme'' containing combining characters. For example, the character length of "møøse" is 5 but the byte length is 7 in UTF-8 and 10 in UTF-16.
+{{omit from|GUISS|Can use Microsoft Word document properties, but this might not be accurate}}
+{{omit from|Openscad}}
+In this task, the goal is to find the <em>character</em> and <em>byte</em> length of a string.
+This means encodings like [[UTF-8]] need to be handled properly, as there is not necessarily a one-to-one relationship between bytes and characters. <br>
+By ''character'', we mean an individual Unicode ''code point'', not a user-visible ''grapheme'' containing combining characters.
+For example, the character length of "møøse" is 5 but the byte length is 7 in UTF-8 and 10 in UTF-16.
 
-Non-BMP code points (those between 0x10000 and 0x10FFFF) must also be handled correctly: answers should produce actual character counts in code points, not in code unit counts. Therefore a string like "𝔘𝔫𝔦𝔠𝔬𝔡𝔢" (consisting of the 7 Unicode characters U+1D518  U+1D52B U+1D526 U+1D520 U+1D52C U+1D521 U+1D522) is 7 characters long, '''not''' 14 UTF-16 code units; and it is 28 bytes long whether encoded in UTF-8 or in  UTF-16.
+Non-BMP code points (those between 0x10000 and 0x10FFFF) must also be handled correctly: answers should produce actual character counts in code points, not in code unit counts.
+Therefore a string like "𝔘𝔫𝔦𝔠𝔬𝔡𝔢" (consisting of the 7 Unicode characters U+1D518  U+1D52B U+1D526 U+1D520 U+1D52C U+1D521 U+1D522) is 7 characters long, '''not''' 14 UTF-16 code units; and it is 28 bytes long whether encoded in UTF-8 or in  UTF-16.
 
-Please mark your examples with <nowiki>===Character Length=== or ===Byte Length===</nowiki>. If your language is capable of providing the string length in graphemes, mark those examples with <nowiki>===Grapheme Length===</nowiki>.  For example, the string "J̲o̲s̲é̲" ("J\x{332}o\x{332}s\x{332}e\x{301}\x{332}") has 4 user-visible graphemes, 9 characters (code points), and 14 bytes when encoded in UTF-8.
+Please mark your examples with <nowiki>===Character Length=== or ===Byte Length===</nowiki>.
+If your language is capable of providing the string length in graphemes, mark those examples with <nowiki>===Grapheme Length===</nowiki>.  <br>
+For example, the string "J̲o̲s̲é̲" ("J\x{332}o\x{332}s\x{332}e\x{301}\x{332}") has 4 user-visible graphemes, 9 characters (code points), and 14 bytes when encoded in UTF-8.

Task/String-length/00META.yaml

@@ -1,2 +1,4 @@
 ---
+category:
+- String manipulation
 note: Basic language learning

Task/String-length/ColdFusion/string-length-1.cfm

@@ -1 +1,6 @@
-#len("Hello World")#
+<cfoutput>
+<cfset str = "Hello World">
+<cfset j = createObject("java","java.lang.String").init(str)>
+<cfset t = j.getBytes()>
+<p>#arrayLen(t)#</p>
+</cfoutput>

Task/String-length/Elixir/string-length-1.elixir

@@ -0,0 +1,3 @@
+name = "J\x{332}o\x{332}s\x{332}e\x{301}\x{332}"
+byte_size(name)
+# => 14

Task/String-length/Elixir/string-length-2.elixir

@@ -0,0 +1,3 @@
+name = "J\x{332}o\x{332}s\x{332}e\x{301}\x{332}"
+Enum.count(String.codepoints(name))
+# => 9

Task/String-length/Elixir/string-length-3.elixir

@@ -0,0 +1,3 @@
+name = "J\x{332}o\x{332}s\x{332}e\x{301}\x{332}"
+String.length(name)
+# => 4

Task/String-length/Java/string-length-1.java

@@ -1,4 +1,4 @@
 String s = "Hello, world!";
-int byteCountUTF16 = s.getBytes("UTF-16").length; // Incorrect it yield 16 that is with the BOM
-int byteCountUTF16 = s.getBytes("UTF-16LE").length; // Correct it yield 14
-int byteCountUTF8  = s.getBytes("UTF-8").length;
+int byteCountUTF16 = s.getBytes("UTF-16").length; // Incorrect: it yields 28 (that is with the BOM)
+int byteCountUTF16LE = s.getBytes("UTF-16LE").length; // Correct: it yields 26
+int byteCountUTF8  = s.getBytes("UTF-8").length; // yields 13

Task/String-length/Maple/string-length-1.maple

@@ -0,0 +1 @@
+length("Hello world");

Task/String-length/Maple/string-length-2.maple

@@ -0,0 +1 @@
+nops(convert("Hello world",bytes));

Task/String-length/Mercury/string-length-1.mercury

@@ -0,0 +1,20 @@
+:- module string_byte_length.
+:- interface.
+
+:- import_module io.
+
+:- pred main(io::di, io::uo) is det.
+
+:- implementation.
+
+:- import_module list, string.
+
+main(!IO) :-
+    Words = ["møøse", "𝔘𝔫𝔦𝔠𝔬𝔡𝔢", "J\x332\o\x332\s\x332\e\x301\\x332\"],
+    io.write_list(Words, "", write_length, !IO).
+
+:- pred write_length(string::in, io::di, io::uo) is det.
+
+write_length(String, !IO):-
+    NumBytes = count_utf8_code_units(String),
+    io.format("%s: %d bytes\n", [s(String), i(NumBytes)], !IO).

Task/String-length/Mercury/string-length-2.mercury

@@ -0,0 +1,20 @@
+:- module string_character_length.
+:- interface.
+
+:- import_module io.
+
+:- pred main(io::di, io::uo) is det.
+
+:- implementation.
+
+:- import_module list, string.
+
+main(!IO) :-
+    Words = ["møøse", "𝔘𝔫𝔦𝔠𝔬𝔡𝔢", "J\x332\o\x332\s\x332\e\x301\\x332\"],
+    io.write_list(Words, "", write_length, !IO).
+
+:- pred write_length(string::in, io::di, io::uo) is det.
+
+write_length(String, !IO) :-
+    NumChars = count_codepoints(String),
+    io.format("%s: %d characters\n", [s(String), i(NumChars)], !IO).