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Parsing HTML into NSAttributedText - how to set font?
...ttribute with value in hex string format color: #000000. See this link for converting UIColor to hex string: gist.github.com/yannickl/16f0ed38f0698d9a8ae7
– Miroslav Hrivik
Aug 16 '17 at 14:19
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What is the correct way to check for string equality in JavaScript?
..."a") == new String("a")
will return false.
Call the valueOf() method to convert it to a primitive for String objects,
new String("a").valueOf() == new String("a").valueOf()
will return true
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How to execute raw SQL in Flask-SQLAlchemy app
...lumn']) # Access by column name as a string
r_dict = dict(r.items()) # convert to dict keyed by column names
Personally, I prefer to convert the results into namedtuples:
from collections import namedtuple
Record = namedtuple('Record', result.keys())
records = [Record(*r) for r in result.fet...
Drop shadow for PNG image in CSS
... 100 images just by typing one command! For example:
for i in "*.png"; do convert $i '(' +clone -background black -shadow 80x3+3+3 ')' +swap -background none -layers merge +repage "shadow/$i"; done
The above (shell) command takes each .png file in the current directory, applies a drop shadow, and...
do..end vs curly braces for blocks in Ruby
...he precedence issue. I sometimes get unexpected exceptions when I try and convert do; end to {}
– idrinkpabst
Jul 22 '13 at 1:54
2
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Calculate the center point of multiple latitude/longitude coordinate pairs
...on of the approach recommended there for spherical coordinates would be:
Convert each lat/long pair into a unit-length 3D vector.
Sum each of those vectors
Normalise the resulting vector
Convert back to spherical coordinates
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BLE（一）概述&工作流程&常见问题 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble.html
0x1 BLE概述“蓝牙”，即Bluetooth，是斯堪的纳维亚语中 Blåtand / Blåtann 的英化版本。该词是十世纪的一位国王Harald Bluetooth的绰号，相传他将纷争不断的丹麦部落统一为一个王国，并引...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
文章源自：https://www.gandalf.site/2018/11/ble_23.html
参考低功耗蓝牙（BLE）安全初探
0x1 信道BLE的物理通道即“频道，分别是‘f=2402+k*2 MHz, k=0, … ,39’，带宽为2MHz”的40个RF Channel。
其中，有3个信道是advertising channel（广播通道）...
FFMPEG (libx264) “height not divisible by 2”
...as the pixel format; it didn't care about the video size. Then I needed to convert it to yuv420p, and then it cared about the video size. I looked up yuv420p on wikipedia, I think it's a multi-pixel color format, that needs the image to be a specific size. Not sure why it matters compressed, though....
Python import csv to list
...e as opposed to text mode. On some systems text mode means that \n will be convertes to platform-specific new line when reading or writing. See docs.
– Maciej Gol
May 24 '15 at 8:12
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