大约有 5,400 项符合查询结果（耗时：0.0421秒） [XML]
MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
...'@'%' through a socket.
root@myhost:/home/mysql-5.5.16-linux2.6-x86_64# ./mysql -ubill -ppass --socket=/tmp/mysql-5.5.sock
Welcome to the MySQL monitor (...)
mysql> SELECT user, host FROM mysql.user;
+------+-----------+
| user | host |
+------+-----------+
| ...
Is gcc std::unordered_map implementation slow? If so - why?
...ode will rehash.
#define SIZE 10000000
#define DEPTH 3
std::vector<uint64_t> vec(SIZE);
boost::mt19937 rng;
boost::uniform_int<uint64_t> dist(std::numeric_limits<uint64_t>::min(),
std::numeric_limits<uint64_t>::max());
std::unordered_map<...
Store JSON object in data attribute in HTML jQuery
...se, i just found the answer to that question here: stackoverflow.com/a/42864472 "You don't need to stringify objects to store them using jQuery.data()"
– user1063287
Aug 7 '19 at 8:04
...
No ConcurrentList in .Net 4.0?
...atively slight added overhead. When the list expands from e.g. size 32 to 64, keep the size-32 array and create a new size-64 array. When adding each of the next 32 items, put it in slot a 32-63 of the new array and copy an old item from the size-32 array to the new one. Until the 64th item is ad...
How can I get `find` to ignore .svn directories?
...
64
John, I'm the author of ack, and if you can give me details of the speed problems of ack vs. grep, I'd appreciate it. They've been complet...
How to set Java environment path in Ubuntu
...
Already solved here stackoverflow.com/questions/24641536/…
– user1420482
Apr 16 '18 at 2:02
1
...
How to debug Lock wait timeout exceeded on MySQL?
...4, 8 row lock(s), undo log entries 1
MySQL thread id 3686635, query id 124164167 10.64.89.145 viget updating
DELETE FROM file WHERE file_id in ('6dbafa39-7f00-0001-51f2-412a450be5cc' )
Foreign key constraint fails for table `backoffice`.`attachment`:
,
CONSTRAINT `attachment_ibfk_2` FOREIGN KEY (`...
Types in Objective-C on iOS
...
SHRT_MAX: 32767
INT_MIN: -2147483648
INT_MAX: 2147483647
LONG_MIN: -2147483648
LONG_MAX: 2147483647
ULONG_MAX: 4294967295
LLONG_MIN: -9223372036854775808 ...
size_t vs. uintptr_t
...vermind segmented architectures, what about a modern architecture like x86-64? Early implementations of this architecture only give you a 48-bit addressable space, but the pointers themselves are a 64-bit data type. The largest contiguous block of memory you could reasonably address would be 48-bit,...
Smallest data URI image possible for a transparent image
...in some browsers).
Shorter (but unstable - 74 bytes)
data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
I would advise using the slightly longer and more stable version as follows:
⇊ Stable ⇊ (but slightly longer - 78 bytes)
data:image/gif;base64,R0lGODlhAQABAIAAAA...