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Questions tagged [char]

char refers to the character data-type, representing letters, digits, punctuation marks, control characters, etc. Use this tag for questions relating to and usage of the character data-type.

The keyword char is used in many programming languages, often defining a 1-byte memory location representing ASCII, UTF-8, UTF-16, UTF-32, and ISO-8895-1 character encodings. Arrays of characters can create Strings used to form words, descriptive text, or even extremely large numbers unable to be represented exactly by 32 or 64 bits.

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How to convert a single char into an int

I have a string of digits, e.g. "123456789", and I need to extract each one of them to use them in a calculation. I can of course access each char by index, but how do I convert it into an int? I've looked into atoi(), but it takes a string as…
jonsb
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Isn't the size of character in Java 2 bytes?

I used RandomAccessFile to read a byte from a text file. public static void readFile(RandomAccessFile fr) { byte[] cbuff = new byte[1]; fr.read(cbuff,0,1); System.out.println(new String(cbuff)); } Why am I seeing one full character…
Shrinath
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What is the first character in the sort order used by Windows Explorer?

For example, in a Windows folder, if we create some files and name them 1.html, 2.txt, 3.txt, photo.jpg, zen.png the order will be as is. But if we create another file with the name _file.doc it will be placed at the top. (considering we sort by…
shxfee
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Insert line break in postgresql when updating text field

I am trying to update a text field in a table of my postgresql database. UPDATE public.table SET long_text = 'First Line' + CHAR(10) + 'Second line.' WHERE id = 19; My intended result is that the cell will look like this: First Line Second…
alexyes
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How to reverse String.fromCharCode?

String.fromCharCode(72) gives H. How to get number 72 from char H?
IAdapter
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SQL query for a carriage return in a string and ultimately removing carriage return

SQL query for a carriage return in a string and ultimately removing carriage return I have some data in a table and there are some carriage returns in places where I don't want them. I am trying to write a query to get all of the strings that…
Maestro1024
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How do I convert a single char to a string?

I'd like to enumerate a string and instead of it returning chars I'd like to have the iterative variable be of type string. This probably isn't possible to have the iterative type be a string so what is the most efficient way to iterate through this…
Ian R. O'Brien
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How to check if a String contains any letter from a to z?

Possible Duplicate: C# Regex: Checking for “a-z” and “A-Z” I could just use the code below: String hello = "Hello1"; Char[] convertedString = String.ToCharArray(); int errorCounter = 0; for (int i = 0; i <…
Hendra Anggrian
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Determine if char is a num or letter

How do I determine if a char in C such as a or 9 is a number or a letter? Is it better to use: int a = Asc(theChar); or this? int a = (int)theChar
Mona
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What is this char? 65279 ''

I have two strings. one is "\"" and the other is "\"" I think that they are same. However, String.Compare says they are different. This is very strange. Here's my code: string b = "\""; string c = "\""; if (string.Compare(b, c) == 0) { …
장선민
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Efficiently repeat a character/string n times in Scala

I would like to do the following more efficiently: def repeatChar(char:Char, n: Int) = List.fill(n)(char).mkString def repeatString(char:String, n: Int) = List.fill(n)(char).mkString repeatChar('a',3) // res0: String = aaa repeatString("abc",3)…
TimY
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How to get the ASCII value in JavaScript for the characters

Possible Duplicate: Convert character to ASCII code in Javascript my requirement is to get the ASCII value of the alphabet letters... Can anyone suggest how to do this in JavaScript?
Anand Murugan
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Should a buffer of bytes be signed or unsigned char buffer?

Should a buffer of bytes be signed char or unsigned char or simply a char buffer? Any differences between C and C++? Thanks.
jackhab
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Why can't I static_cast between char * and unsigned char *?

Apparently the compiler considers them to be unrelated types and hence reinterpret_cast is required. Why is this the rule?
Nick
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Is char guaranteed to be exactly 8-bit long?

That's all. Didn't find any similar topic so bear with me it there is.
Ori Popowski
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