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记一次数据库表自增长（Auto Increment）故障 - 数据库(内核) - 清泛网 - ...
...不妨创建一个测试表说明问题：
CREATE TABLE IF NOT EXISTS `test` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(100) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
然后插入一行问题数据：
INSERT INTO test (id, name) VALUES (2147483647, 'x');
结果导...
PHP操作MongoDB时的整数问题及对策 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...);
$instance = new Mongo();
$instance = $instance->selectCollection('test', 'test');
for ($i = 0; $i < 10; $i++) {
$instance->insert(array(
'group_id' => rand(1, 5),
'count' => rand(1, 5),
));
}
?>
下面让我们使用group操作，根据group_id分组...
.reg文件删除注册表项和值 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... 前放置一个连字符 (-)。例如，要从以下注册表项中删除 Test 子...要使用 .reg 文件删除注册表项，请在 .reg 文件中的 RegistryPath 前放置一个连字符 (-)。例如，要从以下注册表项中删除 Test 子项：
HKEY_LOCAL_MACHINE\Software
请在 .reg 文...
Linux scp 远程文件上传下载，指定端口 - 操作系统(内核) - 清泛网 - 专注C...
...载，指定端口linux-scp1、默认22端口上传、下载文件：scp test tgz root@xxx xxx xxx xxx: tmpscp root@xxx xxx xxx xxx: tmp test tgz 2、指定端口：scp -P8888 root@xxx xxx xxx xxx: tmp test tgz 1、默认22端口上传、下载文件：
scp test.tgz root@xxx.xxx.xxx.xxx:/tmp
s...
how to convert from int to char*?
...ger64ToCharArray(int64_t value);
https://github.com/JeremyDX/All-Language-Testing-Code/blob/master/C%2B%2B%20Examples/IntegerToCharArrayTesting.cpp
Feel free to try cleaning that code up without hindering performance.
Input: Any signed 64 bit value from min to max range.
Example:
std::cout <...
Best way to require all files from a directory in ruby?
...s require is not confused by the presence or absence of the .rb extension. Tested on MRI 1.8.7-p374, 2.1.5 and 2.2.0 tested. This urban legend comes from Rails, where "clever" autoloading exhibited the behaviour he describes in older versions (and may still exhibit it).
– sheld...
Do you continue development in a branch or in the trunk? [closed]
...ild setups. That's what continuous integration is all about! You have QA test your branches not your mainline trunk.
– PositiveGuy
May 21 '10 at 14:05
|...
@RequestParam vs @PathVariable
...aram is used to extract query parameters
http://localhost:3000/api/group/test?id=4
@GetMapping("/group/test")
public ResponseEntity<?> test(@RequestParam Long id) {
System.out.println("This is test");
return ResponseEntity.ok().body(id);
}
while @PathVariable is used to extract da...
Putting a simple if-then-else statement on one line [duplicate]
...
or
field_plural = None
if field_plural is not None: print("insert into testtable(plural) '{0}'".format(field_plural))
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How to configure Ruby on Rails with no database?
... yes, this works with Rails 4 :) - just validated. If you want to ditch test unit use: rails new myApp-O --skip-bundle -T
– Chris Hough
Oct 8 '13 at 7:01
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