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2024年4月4日签到记录贴 - 签到区 - 清泛IT社区，为创新赋能！
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What do numbers using 0x notation mean?
...rals that start with 0x are hexadecimal integers. (base 16)
The number 0x6400 is 25600.
6 * 16^3 + 4 * 16^2 = 25600
For an example including letters (also used in hexadecimal notation where A = 10, B = 11 ... F = 15)
The number 0x6BF0 is 27632.
6 * 16^3 + 11 * 16^2 + 15 * 16^1 = 27632
24576 ...
How to generate all permutations of a list?
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Mateen Ulhaq
16.6k1111 gold badges6464 silver badges105105 bronze badges
answered Sep 19 '08 at 18:43
Eli BenderskyEli Bendersky
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Disable ActiveRecord for Rails 4
I want to disable ActiveRecord in Rails 4. I did the following in config/application.rb
8 Answers
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difference between Product Backlog Item and Feature in Team Foundation work item types
... which I am basing this answer on... http://www.nsilverbullet.net/2013/06/04/features-help-us-plan-work-better-in-team-foundation-service-scrum-process/
Should you create a Feature or a Product Backlog Item?
If you think/hope that the new work item that you are going to create will fit into a sin...
Iterator invalidation rules
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C++17 (All references are from the final working draft of CPP17 - n4659)
Insertion
Sequence Containers
vector: The functions insert, emplace_back, emplace, push_back cause reallocation if the new size is greater than the old capacity. Reallocation invalidates all the references, pointers,...
How to prevent moment.js from loading locales with webpack?
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Zeeshan Hassan Memon
6,65433 gold badges3434 silver badges5050 bronze badges
answered Aug 21 '14 at 12:09
Tobias K.Tobias K.
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Find element's index in pandas Series
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>>> myseries[myseries == 7]
3 7
dtype: int64
>>> myseries[myseries == 7].index[0]
3
Though I admit that there should be a better way to do that, but this at least avoids iterating and looping through the object and moves it to the C level.
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