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Why does GCC generate such radically different assembly for nearly the same C code?
...st_trunc_one(int i) {
int mantissa, exponent;
mantissa = (i & 0x07fffff) | 0x800000;
exponent = 150 - ((i >> 23) & 0xff);
if (exponent < 0) {
return (mantissa << -exponent); /* diff */
} else {
return (mantissa >> exponen...
How would you implement an LRU cache in Java?
...
102
I like lots of these suggestions, but for now I think I'll stick with LinkedHashMap + Collectio...
Django - limiting query results
I want to take the last 10 instances of a model and have this code:
5 Answers
5
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How to change column datatype from character to numeric in PostgreSQL 8.4
...nding on your data):
alter table presales alter column code type numeric(10,0) using code::numeric;
-- Or if you prefer standard casting...
alter table presales alter column code type numeric(10,0) using cast(code as numeric);
This will fail if you have anything in code that cannot be cast to num...
Add a number to each selection in Sublime Text 2, incremented once per selection
...which will be added to the index for
each selection.
P must be > 0 and will be used to pad the index with
leading zeroes.
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Call a global variable inside module
...
410
You need to tell the compiler it has been declared:
declare var bootbox: any;
If you have bet...
Should I git ignore xcodeproject/project.pbxproj file?
...
130
Update in the light of Swift Package Manager: If you're building a project as a Swift package - ...
C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
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#include <stdio.h>
struct str{
int len;
char s[0];
};
struct foo {
struct str *a;
};
int main(int argc, char** argv) {
struct foo f={0}...
Formatting “yesterday's” date in python
...
406
Use datetime.timedelta()
&gt;&gt;&gt; from datetime import date, timedelta
&gt;&gt;&gt; yester...
The role of #ifdef and #ifndef
...d" while ifndef means "if the following is not defined".
So:
#define one 0
#ifdef one
printf("one is defined ");
#endif
#ifndef one
printf("one is not defined ");
#endif
is equivalent to:
printf("one is defined ");
since one is defined so the ifdef is true and the ifndef is false. It ...