大约有 44,000 项符合查询结果（耗时：0.0363秒） [XML]
How can I distribute python programs?
...arget machine himself and needs to provide instructions to the client. At least on Windows, I think that style of distribution makes sense.
– Daniel Naab
Oct 13 '09 at 9:48
1
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Regex to check whether a string contains only numbers [duplicate]
... Change + into *: ^-?\d*\.?\d*$. + mean that you looking for at least one number on front, * looking for zero or many numbers.
– codename-
Aug 26 '13 at 1:11
2
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Purge or recreate a Ruby on Rails database
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It seems rake db:reset also runs all migrations (at least on Rails 3), so that should be all that is needed, right?
– plindberg
Mar 22 '11 at 13:37
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How do I add comments to package.json for npm install?
... comments in JSON config files. The situation with NPM is silly to say the least.
– Muhammad Rehan Saeed
Jul 24 '16 at 14:06
5
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Determine if map contains a value for a key?
...ms far more straightforward to me to say that a certain element appears at least once in this map. Which is what count does.
– PiersyP
May 7 '17 at 20:07
1
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Is an empty href valid?
... it says that it can be a relative-URL-with-fragment string, which must at least be a relative-URL string, which can be a path-relative-scheme-less-URL string, which is a path-relative-URL string that doesn’t start with a scheme string followed by :, and its definition says (bold emphasis mine):
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What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
...ConcurrentHashMap is preferred when you can use it - though it requires at least Java 5.
It is designed to scale well when used by multiple threads. Performance may be marginally poorer when only a single thread accesses the Map at a time, but significantly better when multiple threads access the m...
Show history of a file? [duplicate]
... config --global color.ui true (without the double dash before config). At least that is what worked for me using git version 1.9.1
– Norman Breau
Aug 16 '17 at 14:37
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Reducing MongoDB database file size
...mp; repaired" and "the switch" would never happen. With compact, he can at least keep the existing files in place. I agree, it's not a full solution, but it's an incremental improvement.
– Gates VP
Jul 12 '12 at 20:46
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Can't find the 'libpq-fe.h header when trying to install pg gem
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It looks like in Ubuntu that header is part of the libpq-dev package (at least in the following Ubuntu versions:
11.04 (Natty Narwhal), 10.04 (Lucid Lynx), 11.10 (Oneiric Ocelot), 12.04 (Precise Pangolin), 14.04 (Trusty Tahr) and 18.04 (Bionic Beaver)):
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/usr/include/postgresql/libpq-fe.h
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