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什么是 Hex 编码方式？AppInventor 支持 Hex 编码传输吗？ - App Inventor ...
Hex 编码方式通常指：
将二进制数据按十六进制文本形式表示。
也就是：binary data → hex string
使用 ByteArray 拓展可以转换 Hex 编码。
https://www.fun123.cn/reference/ ... l#ByteArray-Methods
开发AppInventor2拓展时，依赖第三方jar库怎么写？ - App Inventor 2 拓展 ...
开发拓展的详细步骤见：https://www.fun123.cn/reference/extensions/aix_dev.html
如果拓展依赖了第三方库，则处理方法如下（已更新进了上面文档）：
如果拓展用到了第三方库，也可以进行申明：@UsesLibraries(libraries = "okhttp-3.12.13.jar...
Class 'DOMDocument' not found
...om in Configure Command, what should i do next?
– ws_123
Jan 18 '13 at 9:38
That depends on your system. Worst case yo...
Regular Expression: Any character that is NOT a letter or number
... is the simplest one: \D - matches all non digit characters.
var x = "123 235-25%";
x.replace(/\D/g, '');
Results in x: "12323525"
See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions
...
Skip rows during csv import pandas
...
5s 15s 20d 6s 14n 10s USGS 08041780 2018-05-06 00:00 CDT 1.98 A
It would be nice if there was a way to automatically skip the n'th row as well as the n'th line.
As a note, I was able to fix my issue with:
import pandas as pd
ds = pd.read_csv(fname, comment='#', sep='\t', heade...
How to get the current time in milliseconds from C in Linux?
...
98
This can be achieved using the POSIX clock_gettime function.
In the current version of POSIX, ...
How to detect page zoom level in all modern browsers?
...
Clokman
8988 bronze badges
answered Jun 14 '16 at 14:34
user1080381user1080381
1,18611 ...
How do I access command line arguments in Python?
...
123
import sys
sys.argv[1:]
will give you a list of arguments (not including the name of the py...
How to convert int to char with leading zeros?
...d as varchar(5)), 5)
It will get the result in 5 digits, ex: 00001,...., 01234
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Adding header for HttpURLConnection
...on.setConnectTimeout(60 * 1000);
String authorization="xyz:xyz$123";
String encodedAuth="Basic "+Base64.encode(authorization.getBytes());
connection.setRequestProperty("Authorization", encodedAuth);
int responseCode = connection.getResponseCode();
...