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App Inventor 2 鸿蒙先行版：AppInventor 从此支持全平台，不再安卓专属 - ...
大家好，这里是 App Inventor 2 中文网（fun123.cn）。
今天想和大家聊一个很多人关心、但我们一直比较谨慎的话题——App Inventor 2 的鸿蒙（HarmonyOS NEXT）版本。
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先说结论
鸿蒙先行版已...
Getting and removing the first character of a string
I would like to do some 2-dimensional walks using strings of characters by assigning different values to each character. I was planning to 'pop' the first character of a string, use it, and repeat for the rest of the string.
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Convert a String In C++ To Upper Case
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29 Answers
29
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Why would a post-build step (xcopy) occasionally exit with code 2 in a TeamCity build?
...ying is a file or a directory. This error will appear as "exited with code 2". When you run the same xcopy at a command prompt, you'll see that xcopy is asking for a response of file or directory.
To resolve this issue with an automated build, you can echo in a pre-defined response with a pipe.
To...
Putting an if-elif-else statement on one line?
...t's less readable:
>>> i=100
>>> a = 1 if i<100 else 2 if i>100 else 0
>>> a
0
>>> i=101
>>> a = 1 if i<100 else 2 if i>100 else 0
>>> a
2
>>> i=99
>>> a = 1 if i<100 else 2 if i>100 else 0
>>> a
1
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Android Fragment lifecycle over orientation changes
Using the compatibility package to target 2.2 using Fragments.
7 Answers
7
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How to filter by IP address in Wireshark?
I tried dst==192.168.1.101 but only get :
8 Answers
8
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quick random row selection in Postgres
... myid FROM mytable OFFSET floor(random()*N) LIMIT 1;
Consider a table of 2 rows; random()*N generates 0 <= x < 2 and for example SELECT myid FROM mytable OFFSET 1.7 LIMIT 1; returns 0 rows because of implicit rounding to nearest int.
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What is the proper way to format a multi-line dict in Python?
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242
I use #3. Same for long lists, tuples, etc. It doesn't require adding any extra spaces beyond ...
What is the iBeacon Bluetooth Profile
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228
For an iBeacon with ProximityUUID E2C56DB5-DFFB-48D2-B060-D0F5A71096E0, major 0, minor 0, and ...