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App Inventor 2 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录...
...位于该路径中，则只需输入文件名称即可。目标路径可以是: /mnt/sdcard/my_file.txt。操作完成后会触发 DownloadFileFinished 事件。
UploadFile(srcFilePath,desFileName)
上传文件。例如：/public_html/my_directory/my_file.txt。如果位于该路径中，则只...
Map Tiling Algorithm
...olor.
– robert king
Oct 20 '13 at 2:32
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Specifically, what's dangerous about casting the result of malloc?
... when compiling in 64-bit mode, your returned pointer will be truncated to 32-bits.
EDIT:
Sorry for being too brief. Here's an example code fragment for discussion purposes.
main()
{
char * c = (char *)malloc(2) ;
printf("%p", c) ;
}
Suppose that the returned heap pointer is something bi...
How do I ignore files in Subversion?
...ave the following ignore list for a Visual Studio .NET project:
bin obj
*.exe
*.dll
_ReSharper
*.pdb
*.suo
You can find this list in the context menu at TortoiseSVN / Properties.
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Why does the 260 character path length limit exist in Windows?
...ealize that the system tracked the current path per drive, and we have 26 (32 with symbols) maximum drives (and current directories).
The INT 0x21 AH=0x47 says “This function returns the path description without the drive letter and the initial backslash.” So we see that the system stores the C...
Checking whether a variable is an integer or not [duplicate]
...nt even if the real part is integral and imaginary part is 0.
(np.int8|16|32|64(5) means that np.int8(5), np.int32(5), etc. all behave identically)
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How do I convert dates in a Pandas data frame to a 'date' data type?
...
a time
0 1 2013-01-01
1 2 2013-01-02
2 3 2013-01-03
In [32]: df['time'] = df['time'].astype('datetime64[ns]')
In [33]: df
Out[33]:
a time
0 1 2013-01-01 00:00:00
1 2 2013-01-02 00:00:00
2 3 2013-01-03 00:00:00
...
Add st, nd, rd and th (ordinal) suffix to a number
...4th
25 25th
26 26th
27 27th
28 28th
29 29th
30 30th
31 31st
32 32nd
33 33rd
34 34th
35 35th
36 36th
37 37th
38 38th
39 39th
40 40th
41 41st
42 42nd
43 43rd
44 44th
45 45th
46 46th
47 47th
48 48th
49 49th
50 50th
51 51st
52 52nd
53 53rd
54 5...
How do you diff a directory for only files of a specific type?
...
You can also use find with -exec to call diff:
cd /destination/dir/1
find . -name *.xml -exec diff {} /destination/dir/2/{} \;
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How to generate unique ID with node.js
...
The fastest possible way to create random 32-char string in Node is by using native crypto module:
const crypto = require("crypto");
const id = crypto.randomBytes(16).toString("hex");
console.log(id); // => f9b327e70bbcf42494ccb28b2d98e00e
...