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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...()
{ "_id" : ObjectId("5031143350f2481577ea81e5"), "classid" : 1, "age" : 20, "name" : "kobe" }
{ "_id" : ObjectId("5031144a50f2481577ea81e6"), "classid" : 1, "age" : 23, "name" : "nash" }
{ "_id" : ObjectId("5031145a50f2481577ea81e7"), "classid" : 2, "age" : 18, "name" : "james" }
{ "_id" : Obj...
“for loop” with two variables? [duplicate]
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201
If you want the effect of a nested for loop, use:
import itertools
for i, j in itertools.prod...
Get current time in milliseconds in Python?
...nt is 7, not 8.
– davr
Sep 9 '13 at 20:37
1
@ParallelUniverse: .utcnow() uses GetSystemTimeAsFile...
how to create a file name with the current date & time in python?
...ort time
timestr = time.strftime("%Y%m%d-%H%M%S")
print timestr
yields:
20120515-155045
so your filename could append or use this string.
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Upgrade Node.js to the latest version on Mac OS
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Here's how I successfully upgraded from v0.8.18 to v0.10.20 without any other requirements like brew etc, (type these commands in the terminal):
sudo npm cache clean -f (force) clear you npm cache
sudo npm install -g n install n (this might take a while)
sudo n stable upgrade to ...
What's the difference between “git reset” and “git checkout”?
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204
git reset is specifically about updating the index, moving the HEAD.
git checkout is about up...
Convert String to SecureString
... answered Jun 2 '14 at 14:44
M2012M2012
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PHP Constants Containing Arrays?
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answered Aug 17 '09 at 20:56
user156676user156676
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JavaScript - cannot set property of undefined
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data: c
};
};
If you're in an environment that supports ES2015 features, you can use computed property names:
d = {
[a]: {
greetings: b,
data: c
}
};
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