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Why do we use Base64?
...hat are random binary (ie sending an image in an email):
MIME-Version: 1.0
Content-Description: "Base64 encode of a.gif"
Content-Type: image/gif; name="a.gif"
Content-Transfer-Encoding: Base64
Content-Disposition: attachment; filename="a.gif"
Here we see that a GIF image is encoded i...
Extract subset of key-value pairs from Python dictionary object?
...works in 2.7 too):
{k: bigdict[k] for k in ('l', 'm', 'n')}
Update: As Håvard S points out, I'm assuming that you know the keys are going to be in the dictionary - see his answer if you aren't able to make that assumption. Alternatively, as timbo points out in the comments, if you want a key tha...
Easy interview question got harder: given numbers 1..100, find the missing number(s) given exactly k
... every polynomial factors uniquely (ring of polynomials is an Euclidean domain), this means ai are uniquely determined, up to permutation.
This ends a proof that remembering powers is enough to recover the numbers. For constant k, this is a good approach.
However, when k is varying, the direct app...
How to get the build/version number of your Android application?
...he AndroidManifest.xml.
defaultConfig {
versionCode 1
versionName "1.0"
}
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Compression/Decompression string with C#
... only for UTF8-based things. If you add in, say, Swedish characters like åäö to the string value you're serialize/deserializing it will fail a round-trip test :/
– bc3tech
Aug 21 '19 at 12:32
...
MediaHelper 媒体助手扩展：从媒体文件提取元数据和专辑封面 · App Inventor 2 中文网
...
版本
日期
修改内容
1.0
2021-07-06
初始版本
1.1
2024-09-04
Android 14 适配
截图
应用截图
文件列表示例
...
How do I read CSV data into a record array in NumPy?
...eds to be added to the genfromtxt call:
Given an input file, myfile.csv:
1.0, 2, 3
4, 5.5, 6
import numpy as np
np.genfromtxt('myfile.csv',delimiter=',')
gives an array:
array([[ 1. , 2. , 3. ],
[ 4. , 5.5, 6. ]])
and
np.genfromtxt('myfile.csv',delimiter=',',dtype=None)
gives ...
TCPServer TCP服务器扩展：在Android设备上创建TCP服务器 · App Inventor 2 中文网
...
版本
日期
修改内容
1.0
2021-04-15
初始版本
1.1
2024-01-14
添加 StopClient() 方法
截图
应用界面
详细截图
...
What is the best Battleship AI?
... {
this.view = view; this.X = x; this.Y = y; this.Bias = 1.0;
}
public Point Location
{
get { return new Point(X, Y); }
}
public IEnumerable<U> FoldAll<U>(U acc, Func<Cell<T>, U, U> trip)
{
...
How to set breakpoints on future shared libraries with a command flag
...ymbols
objdump -T /lib/libacl.so
...
00002bd0 g DF .text 000000d0 ACL_1.0 acl_delete_entry
...
(gdb) break 0x0002bd0
(gdb) x/20i acl_delete_entry
0x2bd0 <acl_delete_entry>: stwu r1,-32(r1)
0x2bd4 <acl_delete_entry+4>: mflr r0
0x2bd8 <acl_delete_entry+8>: ...