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How Does Modulus Divison Work
... means:
27 / 16 = 1, remainder 11
=> 27 mod 16 = 11
Other examples:
30 / 3 = 10, remainder 0
=> 30 mod 3 = 0
35 / 3 = 11, remainder 2
=> 35 mod 3 = 2
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Regular expression for matching HH:MM time format
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375
Your original regular expression has flaws: it wouldn't match 04:00 for example.
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What is the difference between '/' and '//' when used for division?
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Validating IPv4 addresses with regexp
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36 Answers
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How to sort two lists (which reference each other) in the exact same way
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13 Answers
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Python dictionary: Get list of values for list of keys
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213
A list comprehension seems to be a good way to do this:
>>> [mydict[x] for x in mykeys...
用矩阵管理成绩表 - App Inventor 2 矩阵块入门案例 · App Inventor 2 中文网
...：把成绩表装进矩阵
第 2 关：查任意一格的成绩
第 3 关：改成绩（原地修改）
第 4 关：算某一行（某名学生）的平均分
第 5 关：整表转置，横过来看
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a = t # => [1, 2, 3, 4]
a.first a.size - 1 # => [1, 2, 3]
or...