大约有 47,000 项符合查询结果（耗时：0.0625秒） [XML]
Simple way to transpose columns and rows in SQL?
How do I simply switch columns with rows in SQL?
Is there any simple command to transpose?
9 Answers
...
Looking for a good world map generation algorithm [closed]
I'm working on a Civilization-like game and I'm looking for a good algorithm for generating Earth-like world maps. I've experimented with a few alternatives, but haven't hit on a real winner yet.
...
Comparing numbers in Bash
...hen
...
fi
For POSIX shells that don't support (()), you can use -lt and -gt.
if [ "$a" -gt "$b" ]; then
...
fi
You can get a full list of comparison operators with help test or man test.
share
|
...
HEAD and ORIG_HEAD in Git
What do these symbols refer to and what do they mean?
4 Answers
4
...
COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...
Bottom Line
Use either COUNT(field) or COUNT(*), and stick with it consistently, and if your database allows COUNT(tableHere) or COUNT(tableHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those ...
Normalize data in pandas
Suppose I have a pandas data frame df :
5 Answers
5
...
CSS Box Shadow - Top and Bottom Only [duplicate]
...examples of how to do this, but how can I add a box shadow only to the top and bottom of an element?
5 Answers
...
Should I use multiplication or division?
...
Thanks for the tip on using the time command for benchmarking!
– Edmundito
Oct 22 '08 at 17:11
2
...
What is the difference between a port and a socket?
...
Summary
A TCP socket is an endpoint instance defined by an IP address and a port in the context of either a particular TCP connection or the listening state.
A port is a virtualisation identifier defining a service endpoint (as distinct from a service instance endpoint aka session identifier)...
Maximum and Minimum values for ints
I am looking for minimum and maximum values for integers in python. For eg., in Java, we have Integer.MIN_VALUE and Integer.MAX_VALUE . Is there something like this in python?
...