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MIT官方已升级至2.71版本，几乎就是仅增加一个全新主题 - App Inventor 2 ...
2.71 版本主要更新内容：Changes between nb196 and nb197 (July 7, 2024)
This is a component release which includes bugfixes and improvements. It includes a new Android MIT AI2 Companion versions 2.71 (from Google Play) and 2.71u (directly downloaded from MIT App Inventor).
Features:
Ne...
Ubuntu rails install fails on zlib
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If you come across this question trying to install Ruby using Ruby Version Manager (RVM) on Ub...
Calculate distance between two points in google maps V3
... two markers in Google maps V3? (Similar to the distanceFrom function inV2.)
15 Answers
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Updating Bootstrap to version 3 - what do I have to do?
I'm new to Bootstrap and have the older version 2.3.2.
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Why do people say there is modulo bias when using a random number generator?
...Now what happens if you want to generate a random number between say 0 and 2? For the sake of explanation, let's say RAND_MAX is 10 and I decide to generate a random number between 0 and 2 by calling rand()%3. However, rand()%3 does not produce the numbers between 0 and 2 with equal probability!
W...
Meaning of numbers in “col-md-4”,“ col-xs-1”, “col-lg-2” in Bootstrap
...sm, md, lg) for now, I'll start with just the numbers...
the numbers (1-12) represent a portion of the total width of any div
all divs are divided into 12 columns
so, col-*-6 spans 6 of 12 columns (half the width), col-*-12 spans 12 of 12 columns (the entire width), etc
So, if you want two equal...
Why are floating point numbers inaccurate?
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In most programming languages, floating point numbers are represented a lot like scientific no...
What is the most pythonic way to check if an object is a number?
...ber from the numbers module to test isinstance(n, Number) (available since 2.6).
>>> from numbers import Number
... from decimal import Decimal
... from fractions import Fraction
... for n in [2, 2.0, Decimal('2.0'), complex(2, 0), Fraction(2, 1), '2']:
... print(f'{n!r:>14} {isinst...
Bundler: Command not found
...h: bundle: command not found'. From gem list --local I see 'bundler (1.0.2, 1.0.0)' is installed.
15 Answers
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How to change the order of DataFrame columns?
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