大约有 41,400 项符合查询结果（耗时：0.0574秒） [XML]
Pythonic way to combine FOR loop and IF statement
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340
You can use generator expressions like this:
gen = (x for x in xyz if x not in a)
for x in g...
How to create a hex dump of file containing only the hex characters without spaces in bash?
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Giacomo1968
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answered Apr 10 '10 at 20:27
mark4omark4o
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Facebook API - How do I get a Facebook user's profile image through the Facebook API (without requir
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edited Jun 9 '16 at 18:37
Community♦
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answered May 12 '10 at 17:13
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Right query to get the current number of connections in a PostgreSQL DB
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233
Those two requires aren't equivalent. The equivalent version of the first one would be:
SELECT...
Why is lazy evaluation useful?
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Vinko Vrsalovic
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answered Nov 5 '08 at 15:07
mipadimipadi
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How do I clear only a few specific objects from the workspace?
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You'll find the answer by typing ?rm
rm(data_1, data_2, data_3)
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ViewParam vs @ManagedProperty(value = “#{param.id}”)
...erConverter"). Invoking page by http://example.com/context/user.xhtml?id=123 will pass the id parameter through the converter and set the User object as a bean property.
@ManagedProperty:
Sets the value immediately after bean's construction.
Set value is available during @PostConstruct which allo...
How does Rails keep track of which migrations have run for a database?
... schema_migrations.
For example, running a migration file named 20120620193144_create_users.rb will insert a new row with a version of 20120620193144 into the schema_migrations table.
You are free at any point to introduce migrations with earlier versions. Rails will always run any new migrations ...
System.Net.Http: missing from namespace? (using .net 4.5)
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edited Dec 18 '15 at 14:34
answered Mar 8 '12 at 0:38
M.B...