大约有 3,516 项符合查询结果（耗时：0.0249秒） [XML]
Create a GUID in Java
...lly-strong random number generator. Given that, and given the astronomical range given by so many bits in a UUID, you can generate many millions of such values in your app and still sleep well. Using one of the other variants further reduces the possibility of collisions even closer to zero because ...
Creating an R dataframe row-by-row
...ficiently.
With some cleverness behind the scenes, you can sometimes arrange to have one foot in each world. Snapshot based file systems are a good example (which evolved from concepts such as union mounts, which also ply both sides).
If R Core wanted to do this, underlying vector storage co...
Else clause on Python while statement
...rather than just one.
for k in [2, 3, 5, 7, 11, 13, 17, 25]:
for m in range(2, 10):
if k == m:
continue
print 'trying %s %% %s' % (k, m)
if k % m == 0:
print 'found a divisor: %d %% %d; breaking out of loop' % (k, m)
break
else:
...
Everyauth vs Passport.js?
...lopment history, mature.
no longer maintained
great docs
works with a wide range of services
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How do I represent a time only value in .NET?
...time I'm talking about is not an interval, but a single fixed point over a range of dates.
– sduplooy
Jan 10 '10 at 14:40
3
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Functional programming vs Object Oriented programming [closed]
...the problem domain. For example, see list comprehensions in Python or std.range in the D programming language. These are inspired by functional programming.
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Boolean vs boolean in Java
...rst).
Bytes are not types or bits
Note that in memory your variable from range of {0,1} will still occupy at least a byte or a word (xbits depending on the size of the register) unless specially taken care of (e.g. packed nicely in memory - 8 "boolean" bits into 1 byte - back and forth).
By prefe...
Magic number in boost::hash_combine
...s of the old seed makes sure that, even if hash_value() has a fairly small range of values, differences will soon be spread across all the bits.
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How to remove certain characters from a string in C++?
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Here is a different solution for anyone interested. It uses the new For range in c++11
string str("(555) 555-5555");
string str2="";
for (const auto c: str){
if(!ispunct(c)){
str2.push_back(c);
}
}
str = str2;
//output: 555 5555555
cout<<str<<endl;
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.NET List Concat vs AddRange
What is the difference between the AddRange and Concat functions on a generic List? Is one recommended over the other?
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