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Call a python function from jinja2
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@mutant_city, yep. Read that Python function decorator link. Great stuff!
– Bruno Bronosky
Feb 10 '19 at 19:10
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micro:bit 实验05 - 用 P0 引脚读一个自己接的按钮 · App Inventor 2 中文网
... 前置
实验01、实验02
改编自 MIT 官方教程 read button status with Micro:bit I/O pins，扩展改用本站本地文件。
一、器材清单
器材
数量
说明
BBC micro:bit
1
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When creating HTML emails, should we use html, head, body tags?
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Many of the posts on this thread are rather old, and as a result they are no longer accurate.
These days HTML emails should include a doctype, html and body declaration if you intend to do anything fancy at all.
There are a multitude of guides on this...
How does the paste image from clipboard functionality work in Gmail and Google Chrome 12+?
... getAsFile() on them to get a Blob. Once you have a Blob, you can use FileReader on it to see what's in it. This is how you can get a data url for the stuff you just pasted in Chrome:
// window.addEventListener('paste', ... or
document.onpaste = function(event){
var items = (event.clipboardData...
Double vs. BigDecimal?
... use BigDecimal. Otherwise Doubles tend to be good enough.
I do recommend reading the javadoc of BigDecimal as they do explain things better than I do here :)
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What is the difference between quiet NaN and signaling NaN?
I have read about floating-point and I understand that NaN could result from operations. But I can't understand what these are concepts exactly. What is the difference between them?
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Rails :include vs. :joins
...for each user it fetches, whereas if you used :include this information is ready for use.
Great example:
http://railscasts.com/episodes/181-include-vs-joins
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Where did the name `atoi` come from?
...when linkers supported only six significant characters per identifier. Go read your history and be not so snarky.
– Heath Hunnicutt
Aug 11 '10 at 17:27
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Can you attach a UIGestureRecognizer to multiple views?
...erty gives it away:
view
The view the gesture recognizer is attached to. (read-only)
@property(nonatomic, readonly) UIView *view
Discussion You attach (or add) a gesture recognizer to a UIView object
using the addGestureRecognizer:
method.
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What does the “__block” keyword mean?
...variable with this specifier, its reference will be passed to blocks not a read-only copy for more details see Blocks Programming in iOS
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