大约有 40,000 项符合查询结果（耗时：0.0556秒） [XML]
find() with nil when there are no records
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Yes, just do:
Challenge.find_by_id(10)
For Rails 4 and 5:
Challenge.find_by(id: 10)
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Using Pairs or 2-tuples in Java [duplicate]
...to design this class further regarding equality, immutability, etc., especially if you plan to use instances as keys for hashing.
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Base64 Java encode and decode a string [duplicate]
I want to encode a string into base64 and transfer it through a socket and decode it back.
6 Answers
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What do < and > stand for?
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Others have noted the correct answer, but have not clearly explained the all-important reason:
why do we need this?
What do < and > stand for?
&lt; stands for the < sign. Just remember: lt == less than
&gt; stands for the > Just remember: gt == greater than
Why can’t we...
Java equivalent to #region in C#
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Actually this can be achieved. If you scroll down on this post "Yaqub Ahmad" explains how to get this functionality. Also here is a link (kosiara87.blogspot.com/2011/12/…) that shows you how to add it to your existing eclipse e...
WAMP shows error 'MSVCR100.dll' is missing when install
When I tried to install WAMP , that popped up the following alert,
23 Answers
23
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How to elegantly deal with timezones
...t is that inside the DB, date/times are stored in UTC. When on the server, all date/times should be dealt with in UTC. However, I see three problems that I'm trying to overcome:
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JavaScript is in array
...if the result > -1 and false if result === -1
– bm_i
Nov 5 '12 at 19:01
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@bm_i Which faster?...
How to recursively download a folder via FTP on Linux [closed]
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You could rely on wget which usually handles ftp get properly (at least in my own experience). For example:
wget -r ftp://user:pass@server.com/
You can also use -m which is suitable for mirroring. It is currently equivalent to -r -N -l inf.
If you've so...
How to represent empty char in Java Character class
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Three years after the fact, someone finally gave a correct and complete answer.
– Malnormalulo
Feb 16 '15 at 15:57
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