大约有 40,000 项符合查询结果(耗时:0.0480秒) [XML]
.NET HashTable Vs Dictionary - Can the Dictionary be as fast?
...d people talking about the generic advantages of the Dictionary which I totally agree with, which leads the boxing and unboxing advantage for a slight performance gain.
...
Why am I getting 'Assembly '*.dll' must be strong signed in order to be marked as a prerequisite.'?
...sue.
NuGet
With NuGet it's easy to get into this situation if:
You install a package to one project in your solution.
A new version of that package is deployed to the package source.
You install it to another project in the same solution.
This results in two projects in your solution referenci...
Insert an element at a specific index in a list and return the updated list
...
l.insert(index, obj) doesn't actually return anything. It just updates the list.
As ATO said, you can do b = a[:index] + [obj] + a[index:].
However, another way is:
a = [1, 2, 4]
b = a[:]
b.insert(2, 3)
...
Count, size, length…too many choices in Ruby?
...1
In the case where you don't provide a parameter to count it has basically the same effect as calling length. There can be a performance difference though.
We can see from the source code for Array that they do almost exactly the same thing. Here is the C code for the implementation of array.l...
Create numpy matrix filled with NaNs
...r operations in numpy.
You can create an uninitialized array and assign to all entries at once:
>>> a = numpy.empty((3,3,))
>>> a[:] = numpy.nan
>>> a
array([[ NaN, NaN, NaN],
[ NaN, NaN, NaN],
[ NaN, NaN, NaN]])
I have timed the alternatives a[:] ...
In MySQL queries, why use join instead of where?
...le about using strict typing whenever possible. Explicit is almost universally better.
Conclusion
Short of familiarity and/or comfort, I don't see any benefit to continuing to use the ANSI-89 WHERE clause instead of the ANSI-92 JOIN syntax. Some might complain that ANSI-92 syntax is more verb...
Accessing MVC's model property from Javascript
... IconHtml = '@Html.Raw(Model.UserIconHTML)';
The results are good with all types. But our HTML data is now broken and this will break the scripts. The issue is because we are using single quotes ' to wrap the the data and even the data has single quotes.
We can overcome this issue with 2 appro...
What's the difference between @JoinColumn and mappedBy when using a JPA @OneToMany association
...
@MykhayloAdamovych: No, that's actually not quite right. If Branch doesn't have a property which references Company, but the underlying table has a column which does, then you can use @JoinTable to map it. This is an unusual situation, because you would normal...
Download single files from GitHub
...does not support downloading parts of the repository. You have to download all of it. But you should be able to do this with GitHub.
When you view a file it has a link to the "raw" version. The URL is constructed like so
https://raw.githubusercontent.com/user/repository/branch/filename
By fillin...
How can I convert a string to boolean in JavaScript?
...
What about "TRUE" in all uppercase, for example?
– BMiner
Aug 10 '11 at 22:45
108
...
