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Maximum single-sell profit
... O(n) memory!), but it's helpful to see the algorithm evolve:
5 10 4 6 7
min 5 5 4 4 4
best (5,5) (5,10) (5,10) (5,10) (5,10)
Answer: (5, 10)
5 10 4 6 ...
Sorting arrays in NumPy by column
...turn a copy:
In [1]: import numpy as np
In [2]: a = np.array([[1,2,3],[4,5,6],[0,0,1]])
In [3]: np.sort(a.view('i8,i8,i8'), order=['f1'], axis=0).view(np.int)
Out[3]:
array([[0, 0, 1],
[1, 2, 3],
[4, 5, 6]])
To sort it in-place:
In [6]: a.view('i8,i8,i8').sort(order=['f1'], axis...
Getting indices of True values in a boolean list
...e, False, False, False]
>>> [i for i, x in enumerate(t) if x]
[4, 5, 7]
For huge lists, it'd be better to use itertools.compress:
>>> from itertools import compress
>>> list(compress(xrange(len(t)), t))
[4, 5, 7]
>>> t = t*1000
>>> %timeit [i for i, x ...
What are deferred objects?
jQuery 1.5 adds "Deferred Objects". What are they, and what exactly do they do?
4 Answers
...
Add one row to pandas DataFrame
... pd.DataFrame(columns=['lib', 'qty1', 'qty2'])
>>> for i in range(5):
>>> df.loc[i] = ['name' + str(i)] + list(randint(10, size=2))
>>> df
lib qty1 qty2
0 name0 3 3
1 name1 2 4
2 name2 2 8
3 name3 2 1
4 name4 9 6
...
How to embed small icon in UILabel
... |
edited Oct 17 '18 at 5:37
kelin
8,74866 gold badges5656 silver badges8585 bronze badges
answered Oc...
Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
...aul Murrell's package compare:
library(compare)
a1 <- data.frame(a = 1:5, b = letters[1:5])
a2 <- data.frame(a = 1:3, b = letters[1:3])
comparison <- compare(a1,a2,allowAll=TRUE)
comparison$tM
# a b
#1 1 a
#2 2 b
#3 3 c
The function compare gives you a lot of flexibility in terms of wha...
PHP 5: const vs static
In PHP 5, what is the difference between using const and static ?
7 Answers
7
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git-svn not a git command?
... that git svn has ever worked with recent Git Windows distribution (post 1.5.6).
Many problems have been reported before, so git svn may very much be not included in current msysGit releases.
Another current active "Git on Windows" development mingw.git does state in its README that svn does not w...
ggplot with 2 y axes on each side and different scales
...
15 Answers
15
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