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When to use LinkedList over ArrayList in Java?
...th lists take up for N null references.
Since references are either 32 or 64 bits (even when null) on their relative systems, I have included 4 sets of data for 32 and 64 bit LinkedLists and ArrayLists.
Note: The sizes shown for the ArrayList lines are for trimmed lists - In practice, the capacity...
How do I list the symbols in a .so file
...l for demangling C++):
$ objdump -TC libz.so
libz.so: file format elf64-x86-64
DYNAMIC SYMBOL TABLE:
0000000000002010 l d .init 0000000000000000 .init
0000000000000000 DF *UND* 0000000000000000 GLIBC_2.2.5 free
0000000000000000 DF *UND* 0000000000000000 GLIBC_2...
SetUnhandledExceptionFilter and the C/C++ Runtime Library - C/C++ - 清...
...OC)RedirectedSetUnhandledExceptionFilter);
// Code that crashes
}
64 bit programs
The redirection procedure works for 32 bit code as well as for 64 bit code. The sample code provides 32 bit and 64 bit compiler targets.
Static vs. dynamic CRT linking
The code works only with dynamic CRT l...
我帮儿子用App Inventor 2给遥控车装了"蓝牙大脑"，手机一划车就...
...稳定性和操控体验远超预期。
需求分析
儿子想要的是：手机屏幕上显示方向键，手指滑动时遥控车前进、后退、左右转。听起来简单，但拆解一下核心难点：
1. 双向通信：手机要发送指令给车，车上的单片机要能接收并...
Compiling Java 7 code via Maven
...ollows:
ls -l /System/Library/Frameworks/JavaVM.framework/Versions/
total 64
lrwxr-xr-x 1 root wheel 10 30 Oct 16:18 1.4 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 30 Oct 16:18 1.4.2 -> CurrentJDK
lrwxr-xr-x 1 root wheel 10 30 Oct 16:18 1.5 -> CurrentJDK
lrwxr-xr-x 1 root wheel...
How to concatenate a std::string and an int?
...r();
// 7. with itoa
char numstr[21]; // enough to hold all numbers up to 64-bits
result = name + itoa(age, numstr, 10);
// 8. with sprintf
char numstr[21]; // enough to hold all numbers up to 64-bits
sprintf(numstr, "%d", age);
result = name + numstr;
// 9. with STLSoft's integer_to_string
char ...
When should I use the “strictfp” keyword in java?
...rDan Dyer
50.6k1616 gold badges124124 silver badges164164 bronze badges
29
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What is the difference between the kernel space and the user space?
...nerates an interrupt such as int 0x80 or syscall to signal the kernel. x86-64 Linux syscall hello world example:
.data
hello_world:
.ascii "hello world\n"
hello_world_len = . - hello_world
.text
.global _start
_start:
/* write */
mov $1, %rax
mov $1, %rdi
mov $hello_world, %...
How do I upload a file with metadata using a REST web service?
..."7a788f56fa49ae0ba5ebde780efe4d6a89b5db47"
}
Including the file data base64 encoded into the JSON request itself will increase the size of the data transferred by 33%. This may or may not be important depending on the overall size of the file.
Another approach might be to use a POST of the raw fi...
How to convert a string of bytes into an int?
...
Warning: "L" is actually 8 bytes (not 4) in 64 bit Python builds, so this might fail there.
– Rafał Dowgird
Jan 15 '09 at 11:47
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