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Number of lines in a file in Java
... linux' wc -l command takes 0.15 seconds.
public static int countLinesOld(String filename) throws IOException {
InputStream is = new BufferedInputStream(new FileInputStream(filename));
try {
byte[] c = new byte[1024];
int count = 0;
int readChars = 0;
boolean...
What is the best way to find the users home directory in Java?
... using it, getting the appropriate environment variable with System.getenv(String).
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How can I truncate a datetime in SQL Server?
...11), getdate(), 113) as datetime)
The wrong way works by converting to a string, truncating the string, and converting back to a datetime. It's wrong, for two reasons: 1)it might not work across all locales and 2) it's about the slowest possible way to do this... and not just a little; it's like ...
Practical usage of setjmp and longjmp in C
...parent class */
char * name; /* this class name string */
int signalNumber; /* optional signal number */
};
typedef struct _Class Class[1]; /* exception class */
typedef enum _Scope /* exception handling scope */
{
OU...
How are strings passed in .NET?
When I pass a string to a function, is a pointer to the string's contents passed, or is the entire string passed to the function on the stack like a struct would be?
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How do I use InputFilter to limit characters in an EditText in Android?
...haracter shows up in the field. This is because the method gets a SpannableStringBuilder in source parameter with "the-blah" in it and start/end parameters spanning the whole input string... See my answer for a better solution.
– Łukasz Sromek
Sep 29 '12 at 20...
How exactly does the callstack work?
...teed to cause a crash. This is offset, however, by the fact that a little extra code within each called method will save code at the places where the method is called. For that reason, most of the original Macintosh toolbox routines used the Pascal calling convention.
The C calling convention has...
How can I create directory tree in C++/Linux?
...ude "mkpath.h"
#include "emalloc.h"
#include <errno.h>
#include <string.h>
/* "sysstat.h" == <sys/stat.h> with fixup for (old) Windows - inc mode_t */
#include "sysstat.h"
typedef struct stat Stat;
static int do_mkdir(const char *path, mode_t mode)
{
Stat st;
...
How to remove spaces from a string using JavaScript?
How to remove spaces in a string? For instance:
7 Answers
7
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How does this print “hello world”?
...th bit on
The following code does the inverse process, given a lowercase string (max 12 chars), returns the 64 bit long value that could be used with the OP's code:
public class D {
public static void main(String... args) {
String v = "hello test";
int len = Math.min(12, v.len...