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Ternary operator is twice as slow as an if-else block?
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X64 has several additional registers available, and each register is 64-bits. This allows the X64 JIT to perform the inner loop entirely using registers aside from loading i from the array, while the X86 JIT places several stack operations (memory access) in the loop.
value is a 64-bit integer, w...
Why does this code segfault on 64-bit architecture but work fine on 32-bit?
... @user7: "we have a pointer p (of size 64) which is pointing to 32 bits of memory" - wrong. The address of the block allocated by malloc was returned according to the calling convention for a void*. But the calling code thinks the function returns int (since you opted not to tell it otherwis...
What is the difference between “int” and “uint” / “long” and “ulong”?
I know about int and long (32-bit and 64-bit numbers), but what are uint and ulong ?
5 Answers
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Android Facebook integration with invalid key hash
...try inputting it in Facebook.
I got all those results with: Windows 7 64-bit edition, Android Studio 1.2.2, JDK 7.
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Increasing (or decreasing) the memory available to R processes
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Note that on 32-bit Windows, R can only use up to 3Gb of RAM, regardless of how much you have installed. There is a 64-bit version of R for Windows available from REvolution Computing, which runs on 64-bit Windows and can use all the RAM ava...
Programmatically retrieve memory usage on iPhone
...h_task_basic_info. My guess is that this version is not compatible with 64-bit architecture, but not really sure.
– cprcrack
Oct 30 '13 at 18:16
14
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Converting a Java Keystore into PEM Format
...a -text -in foo.pem
read DSA key
Enter PEM pass phrase:
Private-Key: (1024 bit)
priv:
00:8f:b1:af:55:63:92:7c:d2:0f:e6:f3:a2:f5:ff:
1a:7a:fe:8c:39:dd
pub:
00:e2:66:5c:e0:2e:da:e0:6b:a6:aa:97:64:59:14:
7e:a6:2e:5a:45:f9:2f:b5:2d:f4:34:27:e6:53:c7:
You end up with:
foo.jks - ke...
What does .SD stand for in data.table in R
... .SDcols to batch-convert groups of such columns.
We notice that the following columns are stored as character in the Teams data set:
# see ?Teams for explanation; these are various IDs
# used to identify the multitude of teams from
# across the long history of baseball
fkt = c('teamIDBR', 'te...
为什么编译好的libcurl静态lib用不了？ - C/C++ - 清泛网 - 专注C/C++及内核技术
...分代码
#ifdef CURL_STATICLIB
# define CURL_EXTERN
#elif defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__)
# if defined(BUILDING_LIBCURL)
# define CURL_EXTERN __declspec(dllexport)
# else
# define CURL_EXTERN __declspec(dllimport)
# endif
#elif defined(BUILDING_LIB...
Long vs Integer, long vs int, what to use and when?
...ect form of long, and Integer is the object form of int.
The long uses 64 bits. The int uses 32 bits, and so can only hold numbers up to ±2 billion (-231 to +231-1).
You should use long and int, except where you need to make use of methods inherited from Object, such as hashcode. Java.util.collec...