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搭建高可用mongodb集群（一）——配置mongodb - 大数据 & AI - 清泛网 - 专...
...ongodb测试文件夹
#存放整个mongodb文件
mkdir -p /data/mongodbtest/single
#存放mongodb数据文件
mkdir -p /data/mongodbtest/single/data
#进入mongodb文件夹
cd /data/mongodbtest/single
2、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-...
How to check if an object is a generator object in python?
...
Note: if you only need this test, you can avoid a small overhead by using @utdemir solution because inspect.isgenerator is only a shorthand to: isinstance(object, types.GeneratorType).
– bufh
Apr 5 '16 at 7:21
...
In Python, if I return inside a “with” block, will the file still close?
... experiment to show the guarantee you get from the finally keywrod is: def test(): try: return True; finally: return False.
– Ehsan Kia
Jul 11 '14 at 19:57
...
What are best practices for validating email addresses on iOS 2.0
...7f]|\\\\[\\x01-\\x09\\x0b\\x0c\\x0e-\\x7f])+)\\])";
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES[c] %@", emailRegex];
return [emailTest evaluateWithObject:candidate];
}
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...
How do Python's any and all functions work?
...n True when at least one of the elements is Truthy. Read about Truth Value Testing.
all
all will return True only when all the elements are Truthy.
Truth table
+-----------------------------------------+---------+---------+
| | any | all |
+------...
How do I use a Boolean in Python?
...s snippet is a bit misleading... you still need to define "checker" before testing it. While OP defines it earlier, in your example checker = None is absolutely necessary or you will get a UnboundLocalError
– dprogramz
Jan 13 '14 at 18:04
...
$_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'
... POST data.
I check the request method — I actually never thought about testing the $_POST array. I check the required post fields, though. So an empty post request would give the user a lot of error messages - which makes sense to me.
...
How to access session variables from any class in ASP.NET?
... _httpContextAccessor = httpContextAccessor;
}
public void TestSet()
{
_session.SetString("Test", "Ben Rules!");
}
public void TestGet()
{
var message = _session.GetString("Test");
}
}
Source: https://benjii.me/2016/07/using-sessions-and-httpcon...
Splitting string into multiple rows in Oracle
...y (also with regexp and connect by):
with temp as
(
select 108 Name, 'test' Project, 'Err1, Err2, Err3' Error from dual
union all
select 109, 'test2', 'Err1' from dual
)
select distinct
t.name, t.project,
trim(regexp_substr(t.error, '[^,]+', 1, levels.column_value)) as error
from ...
How to do Base64 encoding in node.js?
...se64 = require('nodejs-base64-converter');
console.log(nodeBase64.encode("test text")); //dGVzdCB0ZXh0
console.log(nodeBase64.decode("dGVzdCB0ZXh0")); //test text
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