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What does the comma operator , do?
...
I've seen used most in while loops:
string s;
while(read_string(s), s.len() > 5)
{
//do something
}
It will do the operation, then do a test based on a side-effect. The other way would be to do it like this:
string s;
read_string(s);
while(s.len() >...
Printing hexadecimal characters in C
...rted to int, and to keep the semantical equivalence, the compiler pads the extra bytes with 0xff, so the negative int will have the same numerical value of your negative char. To fix this, just cast to unsigned char when printing:
printf("%x", (unsigned char)variable);
...
What does “Memory allocated at compile time” really mean?
...our code will increase the bin's size in a linear fashion.
If the 1k is a string, of a thousand chars, which is declared like so
const char *c_string = "Here goes a thousand chars...999";//implicit \0 at end
and you then were to vim your_compiled_bin, you'd actually be able to see that string in...
How to run SQL script in MySQL?
...ssword="yourpassword" < "filepath"
I use it this way because when you string it with "" you avoiding wrong path and mistakes with spaces and - and probably more problems with chars that I did not encounter with.
With @elcuco comment I suggest using this command with [space] before so it tell...
How to convert a byte array to a hex string in Java?
...c final char[] HEX_ARRAY = "0123456789ABCDEF".toCharArray();
public static String bytesToHex(byte[] bytes) {
char[] hexChars = new char[bytes.length * 2];
for (int j = 0; j < bytes.length; j++) {
int v = bytes[j] & 0xFF;
hexChars[j * 2] = HEX_ARRAY[v >>> 4];
...
Convert integer into its character equivalent, where 0 => a, 1 => b, etc
...
Assuming you want lower case letters:
var chr = String.fromCharCode(97 + n); // where n is 0, 1, 2 ...
97 is the ASCII code for lower case 'a'. If you want uppercase letters, replace 97 with 65 (uppercase 'A'). Note that if n > 25, you will get out of the range of let...
Binary Data in MySQL [closed]
...mysql_select_db("binary_data");
$data = mysql_real_escape_string(fread(fopen($form_data, "r"), filesize($form_data)));
$result = mysql_query("INSERT INTO binary_data (description, bin_data, filename, filesize, filetype) ".
"VALUES...
Count the number of occurrences of a character in a string in Javascript
I need to count the number of occurrences of a character in a string.
33 Answers
33
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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...ouldn't assume that blindly). So what does feature? Running GProf on your ostringstream code compiled with GCC gives the following breakdown:
44.23% in std::basic_streambuf<char>::xsputn(char const*, int)
34.62% in std::ostream::write(char const*, int)
12.50% in main
6.73% in std::ostream::s...
How do I get the size of a java.sql.ResultSet?
...NLY,
ResultSet.CONCUR_READ_ONLY);
String from_where="FROM myTable WHERE ...blahblah... ";
//h4x
ResultSet rs=s.executeQuery("select count(*)as RECORDCOUNT,"
+ "cast(null as boolean)as MYBOOL,"
+ ...