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ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
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2020-03-01
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Coding in Other (Spoken) Languages
...nnish names, there's a similar dilemma about whether to use special chars (äöå) or replace them with a & o (and if you do use them, you're likely running into charset problems). But yeah, fortunately I haven't had to use Finnish in code for at least 7 years. :)
– Jonik
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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...
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...
How to get the build/version number of your Android application?
...he AndroidManifest.xml.
defaultConfig {
versionCode 1
versionName "1.0"
}
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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...
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
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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 ...
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>: ...
Hidden Features of Visual Studio (2005-2010)?
... make a local variable asignment in the when hit button. { localVariable = 1.0f } or increase values by { staticVariable += 0.1f }
– Charles Beattie
May 10 '10 at 14:28
add a ...