大约有 30,000 项符合查询结果（耗时：0.0234秒） [XML]
Is it possible to install APK file if more than one emulators/devices are connected [duplicate]
...
@djaqeel: i was new to android at that time. Now i know all that very well.
– Shreyash Mahajan
Aug 16 '13 at 6:12
2
...
How do I print the type of a variable in Rust?
...ish to find out the type of a variable and are willing to do it at compile time, you can cause an error and get the compiler to pick it up.
For example, set the variable to a type which doesn't work:
let mut my_number: () = 32.90;
// let () = x; would work too
error[E0308]: mismatched types
--&...
Displaying the build date
... hard way.
The most reliable method turns out to be retrieving the linker timestamp from the PE header embedded in the executable file -- some C# code (by Joe Spivey) for that from the comments to Jeff's article:
public static DateTime GetLinkerTime(this Assembly assembly, TimeZoneInfo target = nu...
Can not connect to local PostgreSQL
...
its taken some time to trawl through my directories and find the right files, but this was indeed the issue. Thanks for the very detailed answer. Once I'd found the correct directory, I needed to set the socket directory, data directory, hb...
DateTime2 vs DateTime in SQL Server
...
The MSDN documentation for datetime recommends using datetime2. Here is their recommendation:
Use the time, date, datetime2 and
datetimeoffset data types for new
work. These types align with the SQL
Standard. They are more portable.
time, datet...
How could the UNIX sort command sort a very large file?
...ry files while relatively small part of the problem is held in memory at a time). See Donald Knuth's The Art of Computer Programming, Vol. 3 Sorting and Searching, Section 5.4 for very in-depth discussion of the subject.
sha...
Calling a Method From a String With the Method's Name in Ruby
...t.method(:length)
n = 100000
Benchmark.bmbm {|x|
x.report("call") { n.times { m.call } }
x.report("send") { n.times { test.send(:length) } }
x.report("eval") { n.times { eval "test.length" } }
}
...as you can see, instantiating a method object is the fastest dynamic way in calling a m...
How to iterate through two lists in parallel?
...rinting and creating a new list, respectively, were investigated using the timeit() function where the number of repetitions used was 1000 times. One of the Python scripts that I had created to perform these investigations is given below. The sizes of the foo and bar lists had ranged from 10 to 1,00...
What really is a deque in STL?
... list, which would allow insertion and deletion from both ends in constant time, but I am troubled by the promise made by the operator [] to be done in constant time. In a linked list, arbitrary access should be O(n), right?
...
Add spaces before Capital Letters
...t[i]);
}
return newText.ToString();
}
Will do it 100,000 times in 2,968,750 ticks, the regex will take 25,000,000 ticks (and thats with the regex compiled).
It's better, for a given value of better (i.e. faster) however it's more code to maintain. "Better" is often compromise of c...