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Reimport a module in python while interactive
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answered Aug 10 '09 at 11:29
Benjamin WohlwendBenjamin Wohlwend
27.5k99 gold badges8282 silver badges9393 bronze badges
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What is the difference between join and merge in Pandas?
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answered Jun 12 '16 at 10:34
Romain JouinRomain Jouin
2,9923131 silver badges5959 bronze badges
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What's the difference between dynamic (C# 4) and var?
...untime know the type - they just save you some typing... the following are 100% identical:
var s = "abc";
Console.WriteLine(s.Length);
and
string s = "abc";
Console.WriteLine(s.Length);
All that happened was that the compiler figured out that s must be a string (from the initializer). In both ...
Cannot resolve the collation conflict between “SQL_Latin1_General_CP1_CI_AS” and “Latin1_General_CI_
...and:
ALTER TABLE YourTableName
ALTER COLUMN OffendingColumn
VARCHAR(100) COLLATE Latin1_General_CI_AS NOT NULL
Marc
UPDATE: to find the fulltext indices in your database, use this query here:
SELECT
fti.object_Id,
OBJECT_NAME(fti.object_id) 'Fulltext index',
fti.is_enabled,
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Extract date (yyyy/mm/dd) from a timestamp in PostgreSQL
... by suffixing it with ::date. Here, in psql, is a timestamp:
# select '2010-01-01 12:00:00'::timestamp;
timestamp
---------------------
2010-01-01 12:00:00
Now we'll cast it to a date:
wconrad=# select '2010-01-01 12:00:00'::timestamp::date;
date
------------
2010-01-01
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Referring to the null object in Python
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answered Jul 20 '10 at 11:54
Ben JamesBen James
102k2323 gold badges181181 silver badges154154 bronze badges
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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...sv --headerline --file students_csv.dat
connected to: 127.0.0.1
imported 10 objects
参数说明：
-type:指明要导入的文件格式
-headerline:指明第一行是列名，不需要导入
-file：指明要导入的文件
查询students集合，验证导入是否成功：
> db.students....
What does enumerate() mean?
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answered Mar 4 '14 at 12:10
Martijn Pieters♦Martijn Pieters
839k212212 gold badges32183218 silver badges28092809 bronze badges
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Which method performs better: .Any() vs .Count() > 0?
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10
Marc: ICollection<T> does not actually derive from ICollection. I was surprised too, but Reflector doesn't lie.
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What is the best method to merge two PHP objects?
...le : $arr1 = array('a' => 9, 'b' => 'asd'); $arr2 = array('a' => 10, 'd' => 'qwert', 0 => 100, 1 => 200, 4 => 400); $arr3 = array_merge($arr1, $arr2); echo(print_r($arr3, 1)); Actual Output : Array ( [a] => 10 [b] => asd [d] => qwert [0] => 100 [1] => 200 [2] =&...