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0.1 float is greater than 0.1 double. I expected it to be false [duplicate]
...id. This difference can and does actually occur, because x86 does not use 64-bits for its internal floating-point computations; it actually uses 80-bits! This is called double extended-precision.
So, even among just x86 compilers, it sometimes happen that the same number is represented two differ...
Disable developer mode extensions pop up in Chrome
...018, this approach works in Chrome Version 69.0.3497.100 (Official Build) (64-bit):
Temporarily enable Developer mode in chrome://extensions
Uninstall the extension that causes the popup using the Load unpacked.
Click on Pack extension, and find and select the folder containing the extension files...
The name 'model' does not exist in current context in MVC3
...ystem.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
<pages pageBaseType="System.Web.Mvc.WebViewPage">
<namespaces>
<add namespace="System.Web.Mvc" />
<add namespace="System.Web.Mvc.Ajax" />
<add namespac...
A fast method to round a double to a 32-bit int explained
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For those who'd like to convert to int64_t you can do that by shifting the mantissa left and then right by 13 bits. This will clear the exponent and the two bits from the 'magic' number, but will keep and propagate the sign to the entire 64-bit signed integer. un...
How to format a number as percentage in R?
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# [1] "0.00%" "0.01%" "0.04%" "0.09%" "0.16%" "0.25%" "0.36%" "0.49%" "0.64%"
# [10] "0.81%" "1.00%"
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When should the volatile keyword be used in C#?
... ecx,eax
00401012 add eax,edx
00401014 cmp eax,64h
00401017 jl main+10h (401010h)
}
for (volatile int i = 0 ; i < 100 ; ++i)
00401019 mov dword ptr [esp],0
00401020 mov eax,dword ptr [esp]
00401023 cmp eax,64h
00401026 jge...
What are the mechanics of short string optimization in libc++?
...chine, 10 chars will fit in the short string. sizeof(string) is 12.
On a 64 bit machine, 22 chars will fit in the short string. sizeof(string) is 24.
A major design goal was to minimize sizeof(string), while making the internal buffer as large as possible. The rationale is to speed move constru...
Show current assembly instruction in GDB
...PC: 0x7ffff740d76d
#3 0x00007ffff7466eb5 in _IO_do_write () from /lib/x86_64-linux-gnu/libc.so.6
#4 0x00007ffff74671ff in _IO_file_overflow ()
from /lib/x86_64-linux-gnu/libc.so.6
#5 0x0000000000408756 in ?? ()
#6 0x0000000000403980 in ?? ()
#7 0x00007ffff740d76d in __libc_start_main ()
f...
Smarty中date_format日期格式化详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...marty中date_format日期格式化详解在php的smarty模板中date_format是对由php提供过来的时间秒进行转换成日期了，那么date_format函数到底怎么用有什么格式，我们一起来看看。...在php的smarty模板中date_format是对由php提供过来的时间秒进行...
Can you change what a symlink points to after it is created?
...t.txt ln -s -f .bash_aliases test
$ grep -C3 ^unlink /tmp/output.txt
lstat64("test", {st_mode=S_IFLNK|0777, st_size=7, ...}) = 0
stat64(".bash_aliases", {st_mode=S_IFREG|0644, st_size=2043, ...}) = 0
symlink(".bash_aliases", "test") = -1 EEXIST (File exists)
unlink("test") ...