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Why does += behave unexpectedly on lists?

... 141 The general answer is that += tries to call the __iadd__ special method, and if that isn't ava...
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In a Django form, how do I make a field readonly (or disabled) so that it cannot be edited?

... As pointed out in this answer, Django 1.9 added the Field.disabled attribute: The disabled boolean argument, when set to True, disables a form field using the disabled HTML attribute so that it won’t be editable by users. Even if a user tampers with the fie...
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JavaScript equivalent to printf/String.Format

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ipython notebook clear cell output in code

...utput of a cell. from IPython.display import clear_output for i in range(10): clear_output(wait=True) print("Hello World!") At the end of this loop you will only see one Hello World!. Without a code example it's not easy to give you working code. Probably buffering the latest n events i...
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How to move one word left in the vi editor

... | edited Dec 15 '19 at 1:05 Peter Mortensen 26.5k2121 gold badges9292 silver badges122122 bronze badges ...
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贝因美创始人谈连续创业 谢宏:蓝海策略下的未来赢家 - 资讯 - 清泛网 - 专...

...27日,贝因美创始人、首席科学家身份的谢宏出席了“2015年创新中国总决赛暨秋季峰会”,并发表主旨演讲,讲述贝因美的从0到1,从1到N的发展历程,阐释成功创业创新的关键点。 “现在主要精力在于如何帮助贝因美转型升级...
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getViewTypeCount and getItemViewType methods of ArrayAdapter

...nt position) { return 0; } public int getViewTypeCount() { return 1; } This indeed provides you with the same view type for every row. Edit - to outline the general flow: You bind data to your AdapterView using an adapter. The AdapterView tries to display items that are visible to the ...
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How can I round up the time to the nearest X minutes?

Is there a simple function for rounding UP a DateTime to the nearest 15 minutes? 13 Answers ...
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When to use cla(), clf() or close() for clearing a plot in matplotlib?

... | edited Jul 6 '18 at 2:08 spinkus 4,29411 gold badge2222 silver badges4646 bronze badges answ...
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How to convert a java.util.List to a Scala list

... 71 import scala.collection.JavaConversions._ will do implicit conversion for you; e.g.: var list...