大约有 42,000 项符合查询结果（耗时：0.0713秒） [XML]
Update a column value, replacing part of a string
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answered Apr 16 '12 at 15:39
Dmytro ShevchenkoDmytro Shevchenko
27.6k66 gold badges4747 silver badges6363 bronze badges
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ASP.NET Identity's default Password Hasher - How does it work and is it secure?
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234
Here is how the default implementation (ASP.NET Framework or ASP.NET Core) works. It uses a Key...
Hidden features of Ruby
...product| product.modulo(factor).zero?}
end
case number
when multiple_of(3)
puts "Multiple of 3"
when multiple_of(7)
puts "Multiple of 7"
end
share
edited Dec 8 '...
How do you delete a column by name in data.table?
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Any of the following will remove column foo from the data.table df3:
# Method 1 (and preferred as it takes 0.00s even on a 20GB data.table)
df3[,foo:=NULL]
df3[, c("foo","bar"):=NULL] # remove two columns
myVar = "foo"
df3[, (myVar):=NULL] # lookup myVar contents
# Method 2a -- A saf...
Is it better to use C void arguments “void foo(void)” or not “void foo()”? [duplicate]
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answered Mar 28 '09 at 23:48
Daniel EarwickerDaniel Earwicker
106k3434 gold badges190190 silver badges271271 bronze badges
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How to use QueryPerformanceCounter?
... my safest bet. (The warning on Boost::Posix that it may not works on Win32 API put me off a bit). However, I'm not really sure how to implement it.
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Oracle Differences between NVL and Coalesce
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316
COALESCE is more modern function that is a part of ANSI-92 standard.
NVL is Oracle specific, ...
How to get the insert ID in JDBC?
... statement.setString(2, user.getPassword());
statement.setString(3, user.getEmail());
// ...
int affectedRows = statement.executeUpdate();
if (affectedRows == 0) {
throw new SQLException("Creating user failed, no rows affected.");
}
tr...
How to use 'find' to search for files created on a specific date? [closed]
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328
As pointed out by Max, you can't, but checking files modified or accessed is not all that hard...
Hash Map in Python
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253
Python dictionary is a built-in type that supports key-value pairs.
streetno = {"1": "Sachin Te...