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MongoDB数据导出导入工具：mongoexport,mongoimport - 大数据 & AI - 清泛...
...e,age
--fieldFile arg file with fields names - 1 per line
-q [ --query ] arg query filter, as a JSON string
--csv export to csv instead of json
-o [ --out ] arg output file; if not specified, stdout is used
--jsonArray output...
Which characters make a URL invalid?
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@techiferous, Yeah, I forgot to allow "%" escaped characters. It should've looked more like: /^([!#$&-;=?-[]_a-z~]|%[0-9a-fA-F]{2})+$/ Was there anything else that you found it should've been accepting? (Just to be clear, that regex only checks ...
Is there a literal notation for an array of symbols?
...nately the list of available %-delimiters is limited
Modifier Meaning
%q[ ] Non-interpolated String (except for \\ \[ and \])
%Q[ ] Interpolated String (default)
%r[ ] Interpolated Regexp (flags can appear after the closing delimiter)
%s[ ] Non-interpolated Symbol
%w[ ] ...
Install dependencies globally and locally using package.json
Using npm we can install the modules globally using -g option. How can we do this in the package.json file?
6 Answers
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Find a commit on GitHub given the commit hash
...ve the repository checked out, from the command line, you can achieve basically the same thing with either of these commands (unique prefixes work here too):
git show 35e32b6a00dec02ae7d7c45c6b7106779a124685
git log -p -1 35e32b6a00dec02ae7d7c45c6b7106779a124685
Note: If you shorten the commit ha...
Simple argparse example wanted: 1 argument, 3 results
...or meddle with formatting lines on the screen or change option characters. All I want to do is "If arg is A, do this, if B do that, if none of the above show help and quit" .
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How to print the values of slices
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I prefer fmt.Printf("%+q", arr) which will print
["some" "values" "list"]
https://play.golang.org/p/XHfkENNQAKb
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Inheriting from a template class in c++
... way you speak about them determines the way to think about them.
Specifically, Area is not a template class, but a class template. That is, it is a template from which classes can be generated. Area<int> is such a class (it's not an object, but of course you can create an object from that cl...
Verifying a specific parameter with Moq
...essy to write a large lambda method (as your example shows). You could put all the test statements in a separate method, but I don't like to do this because it disrupts the flow of reading the test code.
Another option is to use a callback on the Setup call to store the value that was passed into ...
Why covariance and contravariance do not support value type
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Basically, variance applies when the CLR can ensure that it doesn't need to make any representational change to the values. References all look the same - so you can use an IEnumerable<string> as an IEnumerable<object>...