大约有 47,000 项符合查询结果（耗时：0.0971秒） [XML]
Should I implement __ne__ in terms of __eq__ in Python?
...ks to not properly delegating; instead of treating a NotImplemented return from one side as a cue to delegate to __ne__ on the other side, not self == other is (assuming the operand's __eq__ doesn't know how to compare the other operand) implicitly delegating to __eq__ from the other side, then inve...
Converting JSON String to Dictionary Not List
...nts, and then adding [0] on the end of it will take just the first element from that resulting list slice. What you need to use to get the result you want is a list comprehension:
[p[0] for p in datapoints[0:5]]
Here's a simple way to calculate the mean:
sum(p[0] for p in datapoints[0:5])/5. # R...
No Entity Framework provider found for the ADO.NET provider with invariant name 'System.Data.SqlClie
...into the same problem and it looks like EntityFramework although installed from NuGet Package Manager was not correctly installed in the project.
I managed to fix it by running the following command on Package Manager Console:
PM> Install-Package EntityFramework
...
How to check if AlarmManager already has an alarm set?
...ar alarm (registered via AlarmManager) is already set and running. Results from google seem to indicate that there is no way to do this. Is this still correct? I need to do this check in order to advise the user before any action is taken to create a new alarm.
...
How can I download a specific Maven artifact in one command line?
...test version (2.8) of the Maven Dependency Plugin, downloading an artifact from the Maven Central Repository is as simple as:
mvn org.apache.maven.plugins:maven-dependency-plugin:2.8:get -Dartifact=groupId:artifactId:version[:packaging[:classifier]]
where groupId:artifactId:version, etc. are the ...
How do I execute a program from Python? os.system fails due to spaces in path
I have a Python script that needs to execute an external program, but for some reason fails.
10 Answers
...
How can I get stock quotes using Google Finance API?
I'm looking for access to financial data from Google services.
13 Answers
13
...
What's the fastest way to read a text file line-by-line?
...ify FileOptions. For example, if you are reading a large file sequentially from beginning to end, you may benefit from FileOptions.SequentialScan. Again, benchmarking is the best thing you can do.
Using File.ReadLines
This is very much like your own solution except that it is implemented using a S...
Allowed characters in filename [closed]
...at only because I was bitten by that once when I shortened an include file from const.h to con.h and spent half an hour figuring out why the compiler hung.
Turns out DOS ignored extensions for devices so that con.h was exactly the same as con, the input console (meaning, of course, the compiler was...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...xample on different processors, you will find that on some of them benefit from -O2 while other are more favorable to -Os optimizations.
Here are the results for time ./test 0 0 on several processors (user time reported):
Processor (System-on-Chip) Compiler Time (-O2) Time (-Os) Fa...