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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
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5 Answers
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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...oat, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
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Add column with constant value to pandas dataframe [duplicate]
..., size=10)})
In [10]:
In [10]: df
Out[10]:
a
0 0
1 2
2 0
3 1
4 0
5 0
6 0
7 0
8 0
9 0
In [11]: s = df.a[:5]
In [12]: dfa, sa = df.align(s, axis=0)
In [13]: dfa
Out[13]:
a
0 0
1 2
2 0
3 1
4 0
5 0
6 0
7 0
8 0
9 0
In [14]: sa
Out[14]:
0 0
1 2
2 0
3 1
4 ...
How can I convert comma separated string into a List
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answered Feb 15 '12 at 20:59
dasblinkenlightdasblinkenlight
659k6969 gold badges945945 silver badges13551355 bronze badges
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Is there a recommended format for multi-line imports?
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answered Jan 17 '13 at 10:45
Brendan MaguireBrendan Maguire
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How do I add 1 day to an NSDate?
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Swift 5.0 :
var dayComponent = DateComponents()
dayComponent.day = 1 // For removing one day (yesterday): -1
let theCalendar = Calendar.current
let nextDate = theCalendar.date(byAdding: dayComponent, to: Date...
What is a git topic branch?
...t/blog/…
– Nicolas
Jun 27 '09 at 15:12
1
W.r.t. the seperate tree, I believe they are sometimes...
How can I prevent the textarea from stretching beyond his parent DIV element? (google-chrome issue o
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answered Oct 10 '10 at 7:52
Māris KiseļovsMāris Kiseļovs
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What should I do if the current ASP.NET session is null?
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What to add for the update portion in ConcurrentDictionary AddOrUpdate
... M4NM4N
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