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When can I use a forward declaration?
...heless.
– Reunanen
Feb 16 '09 at 16:21
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CSS fixed width in a span
... codeintheholecodeinthehole
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How can I use an array of function pointers?
...it valid code.
– Alex
May 22 '09 at 21:56
This is a horribly bad answer. Due to the missing parentheses, this code doe...
Global variables in Javascript across multiple files
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answered May 28 '10 at 21:57
tvanfossontvanfosson
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How to execute a raw update sql with dynamic binding in rails
...t = ActiveRecord::Base.connection.raw_connection.prepare("update table set f1=? where f2=? and f3=?")
st.execute(f1, f2, f3)
st.close
I'm not sure if there are other ramifications to doing this (connections left open, etc). I would trace the Rails code for a normal update to see what it's doing as...
浮点数在内存中的表示 - C/C++ - 清泛网 - 专注IT技能提升
...g.h>
#include <limits>
int _tmain(int argc, _TCHAR* argv[])
{
float f1 = FLT_MIN;
printf("%f\n", f1);
f1 = FLT_MAX;
printf("%f\n", f1);
// 0 10000101 11110110000000000000000
void * p = (void *)0x42fb0000;
memcpy(&f1, &p, 4);
printf("%f\n", f1);
// 1 11111111 00000000000000...
浮点数在内存中的表示 - C/C++ - 清泛网 - 专注IT技能提升
...g.h>
#include <limits>
int _tmain(int argc, _TCHAR* argv[])
{
float f1 = FLT_MIN;
printf("%f\n", f1);
f1 = FLT_MAX;
printf("%f\n", f1);
// 0 10000101 11110110000000000000000
void * p = (void *)0x42fb0000;
memcpy(&f1, &p, 4);
printf("%f\n", f1);
// 1 11111111 00000000000000...
浮点数在内存中的表示 - C/C++ - 清泛网 - 专注IT技能提升
...g.h>
#include <limits>
int _tmain(int argc, _TCHAR* argv[])
{
float f1 = FLT_MIN;
printf("%f\n", f1);
f1 = FLT_MAX;
printf("%f\n", f1);
// 0 10000101 11110110000000000000000
void * p = (void *)0x42fb0000;
memcpy(&f1, &p, 4);
printf("%f\n", f1);
// 1 11111111 00000000000000...
浮点数在内存中的表示 - C/C++ - 清泛网 - 专注IT技能提升
...g.h>
#include <limits>
int _tmain(int argc, _TCHAR* argv[])
{
float f1 = FLT_MIN;
printf("%f\n", f1);
f1 = FLT_MAX;
printf("%f\n", f1);
// 0 10000101 11110110000000000000000
void * p = (void *)0x42fb0000;
memcpy(&f1, &p, 4);
printf("%f\n", f1);
// 1 11111111 00000000000000...
浮点数在内存中的表示 - C/C++ - 清泛网 - 专注IT技能提升
...g.h>
#include <limits>
int _tmain(int argc, _TCHAR* argv[])
{
float f1 = FLT_MIN;
printf("%f\n", f1);
f1 = FLT_MAX;
printf("%f\n", f1);
// 0 10000101 11110110000000000000000
void * p = (void *)0x42fb0000;
memcpy(&f1, &p, 4);
printf("%f\n", f1);
// 1 11111111 00000000000000...