大约有 47,000 项符合查询结果（耗时：0.0724秒） [XML]
What does “O(1) access time” mean?
...een this term "O(1) access time" used to mean "quickly" but I don't understand what it means. The other term that I see with it in the same context is "O(n) access time". Could someone please explain in a simple way what these terms mean?
...
Swift alert view with OK and Cancel: which button tapped?
I have an alert view in Xcode written in Swift and I'd like to determine which button the user selected (it is a confirmation dialog) to do nothing or to execute something.
...
How to determine a Python variable's type?
...d to double take when I saw this. Java SE8 now contains unsigned integers, and I've developed so much with it that it seems sinful that Java never had unsigned integers before SE8.
– dddJewelsbbb
Nov 26 '18 at 15:39
...
Swift native base class or NSObject
I tested out some isa swizzling with Swift, and found that it only works when NSObject is a super-class (directly or further up), or by using the '@objc' decoration. Otherwise it will follow a static- and vtable-dispatch style, like C++.
...
CATALINA_OPTS vs JAVA_OPTS - What is the difference?
... find out the difference between Apache Tomcat variables - CATALINA_OPTS and JAVA_OPTS in SO and surprised to see that there is no question/answer posted here yet. So I thought of sharing it here (with answer) after finding out the difference. Check the answer/difference below.
...
Google Maps v2 - set both my location and zoom in
...s, does anyone know how to set google maps up, to open up both my location and in a zoomed-in view?
11 Answers
...
Changing all files' extensions in a folder with one command on Windows
How can I use the Windows command line to change the extensions of thousands of files to *****.jpg ?
11 Answers
...
Detecting an “invalid date” Date instance in JavaScript
I'd like to tell the difference between valid and invalid date objects in JS, but couldn't figure out how:
46 Answers
...
Why isn't Python very good for functional programming? [closed]
...was surprised that Python didn't get much of a mention in this question, and when it was mentioned, it normally wasn't very positive. However, not many reasons were given for this (lack of pattern matching and algebraic data types were mentioned). So my question is: why isn't Python very good for ...
NoSQL - MongoDB vs CouchDB [closed]
...noob when it comes to the NoSQL movement. I have heard lots about MongoDB and CouchDB. I know there are differences between the two. Which do you recommend learning as a first step into the NoSQL world?
...