大约有 43,000 项符合查询结果（耗时：0.0365秒） [XML]
Checking for a null int value from a Java ResultSet
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Hm, at least in my case, the problem with this is that calling getObject doesn't necessarily return an Integer, due to the nature of the column type in the oracle db I'm using ("Number").
– Matt Mc
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Unknown Column In Where Clause
...e trying to perform a query like the following (find all the nodes with at least one attachment) where you've used a SELECT statement to create a new field which doesn't actually exist in the database, and try to use the alias for that result you'll run into the same problem:
SELECT nodes.*, (SELEC...
How do I associate a Vagrant project directory with an existing VirtualBox VM?
... I was looking for .vagrant in my profile (Mac). Note that (at least for me) it was in the same folder as the cookbooks folder and VagrantFile. (Vagrant version 1.4.3)
– allicarn
Mar 10 '14 at 14:58
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Difference between java.util.Random and java.security.SecureRandom
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Replace your current code. Use SecureRandom exclusively. Then at least you will have a little guarantee that the result will be hard to predict. If you want the properties of a cryptographically secure PRNG (in your case, that's what you want), then you have to go with SecureRandom only. B...
sql query to return differences between two tables
...oblem might be that you cannot compare a value with null using '='. (Or at least when SET ANSI_NULLS is ON.) You must say: value IS NULL or value IS NOT NULL.
– treaschf
Jan 16 '10 at 17:17
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Generating a unique machine id
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Note that these functions require at least Windows Vista, Windows XP Professional x64 Edition, Windows Server 2008 or Windows Server 2003 with SP1.
– jcoffland
Mar 21 '11 at 20:43
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Authoritative position of duplicate HTTP GET query keys
... order when I tested that), PHP will give you always the last and Java (at least the system I worked with based on Java) always the first value. stackoverflow.com/questions/1809494/…
– SimonSimCity
Mar 8 '12 at 7:33
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Split string based on regex
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@JamesEggers You mean that you want to require at least two upper-case letters, so that you do not split at words like I? re.split(r'[ ](?=[A-Z]{2,}\b)', input) should do it.
– Martin Ender
Nov 3 '12 at 12:55
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Does order of where clauses matter in SQL?
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No, that order doesn't matter (or at least: shouldn't matter).
Any decent query optimizer will look at all the parts of the WHERE clause and figure out the most efficient way to satisfy that query.
I know the SQL Server query optimizer will pick a suitable ind...
Array vs. Object efficiency in JavaScript
...ll, since arrays and objects work very differently (or are supposed to, at least). Arrays have a continuous index 0..n, while objects map arbitrary keys to arbitrary values. If you want to supply specific keys, the only choice is an object. If you don't care about the keys, an array it is.
If you t...