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PadLeft function in T-SQL
...
This works for strings, integers and numeric:
SELECT CONCAT(REPLICATE('0', 4 - LEN(id)), id)
Where 4 is desired length. Works for numbers with more than 4 digits, returns empty string on NULL value.
Why declare a struct that only contains an array in C?
...ever you declare such an object. This could also be achieved with
typedef char ABC[MAX];
but then you have a much bigger problem: you have to be aware that ABC is an array type (even though you can't see this when you declare variables of type ABC) or else you'll get stung by the fact that ABC wi...
How is std::function implemented?
... // function pointer types for the type-erasure behaviors
// all these char* parameters are actually casted from some functor type
typedef R (*invoke_fn_t)(char*, Args&&...);
typedef void (*construct_fn_t)(char*, char*);
typedef void (*destroy_fn_t)(char*);
// type-aware...
Will strlen be calculated multiple times if used in a loop condition?
...g the string, a for loop is probably not the best way to iterate over each character. I'd think a while loop is more direct and easier to manage the index counter.
– mlibby
Jul 6 '12 at 15:40
...
libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术
...:socket(),connect()，返回连接的sockfd
int create_io_channel(const char *ipaddr, int port);
2. 搭建TCP Server
下面以伪代码方式给出，错误处理省略
int main(int argc, char *argv[])
{
// 初始化
…
// event初始化
event_init();
init_server(por...
How do I concatenate two text files in PowerShell?
...ntent inputFile1.txt, inputFile2.txt | Set-Content joinedFile.txt
You can concatenate more than two files with this style, too.
If the source files are named similarly, you can use wildcards:
Get-Content inputFile*.txt | Set-Content joinedFile.txt
Note 1: PowerShell 5 and older versions allowed th...
How to generate a core dump in Linux on a segmentation fault?
...oid);
static void cleanup(void);
void init_signals(void);
void panic(const char *, ...);
struct sigaction sigact;
char *progname;
int main(int argc, char **argv) {
char *s;
progname = *(argv);
atexit(cleanup);
init_signals();
printf("About to seg fault by assigning zero to *s\n...
Pretty-Printing JSON with PHP
... 5.5.3 here, just seems to add a bit of spacing between the characters, not any actual indenting.
– user393219
Jan 30 '14 at 1:33
35
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How do I set a conditional breakpoint in gdb, when char* x points to a string whose value equals “he
Can I specify that I want gdb to break at line x when char* x points to a string whose value equals "hello" ? If yes, how?
...
Clearing a string buffer/builder after loop
...t of creating the SB outside is not losing the internal (potentially long) char[] of it. If in the first iterator it grew up enough, the second loop will not need to resize any char[]. But for getting the advantage the "clear method" will have to preserve the size of the internal array. setLength do...