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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...个students集合，集合中数据如下：
> db.students.find()
{ "_id" : ObjectId("5031143350f2481577ea81e5"), "classid" : 1, "age" : 20, "name" : "kobe" }
{ "_id" : ObjectId("5031144a50f2481577ea81e6"), "classid" : 1, "age" : 23, "name" : "nash" }
{ "_id" : ObjectId("5031145a50f2481577ea81...
Insert auto increment primary key to existing table
... column automatically (I already have 500 rows in DB and want to give them id but I don't want to do it manually). Any thoughts? Thanks a lot.
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What do parentheses surrounding an object/function/class declaration mean? [duplicate]
...ode within the function is contained in the private scope of the function, meaning it can't be accessed at all from outside the function, making it truly private.
See:
http://en.wikipedia.org/wiki/Closure_%28computer_science%29
http://peter.michaux.ca/articles/javascript-namespacing
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Can I bind an array to an IN() condition?
... soulmerge is right. you'll have to construct the query-string.
<?php
$ids = array(1, 2, 3, 7, 8, 9);
$inQuery = implode(',', array_fill(0, count($ids), '?'));
$db = new PDO(...);
$stmt = $db->prepare(
'SELECT *
FROM table
WHERE id IN(' . $inQuery . ')'
);
// bindvalue is ...
MySQL Insert into multiple tables? (Database normalization?)
...s (username, password)
VALUES('test', 'test');
INSERT INTO profiles (userid, bio, homepage)
VALUES(LAST_INSERT_ID(),'Hello world!', 'http://www.stackoverflow.com');
COMMIT;
Have a look at LAST_INSERT_ID() to reuse autoincrement values.
Edit: you said "After all this time trying to figure it ...
private[this] vs private
...
private[this] (equivalent to protected[this]) means that that "y" is
only visible to methods in the same instance. For example, you could
not reference y on a second instance in an equals method, i.e.,
"this.y == that.y" would generate a compilation error on "that....
How to branch with TortoiseHG
...lowing a remote repository, since you can't push your local changes. This means you can't share your branch with other developers you're working with. The correct way to branch is to create a named branch within your repository.
– Peter Graham
Jun 22 '11 at 2...
What does “&” at the end of a linux command mean?
I am a system administrator and I have been asked to run a linux script to clean the system.
4 Answers
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Scatter plot and Color mapping in Python
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@cmarti1138 I'm not sure what you mean, cm.colormap_name and cm.cmapname not actual variables in matplotlib.cm; it's just pseudocode for cm.jet or cm.veridis_r, etc.
– wflynny
Nov 16 '15 at 4:35
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Does setWidth(int pixels) use dip or px?
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@Joffrey yes I see what you mean so I've updated the wording slightly
– SDJMcHattie
Jul 10 '14 at 14:37
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