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Rails migrations: Undo default setting for a column
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edited Nov 7 '18 at 23:48
Joshua Pinter
34k1717 gold badges188188 silver badges208208 bronze badges
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How to sort a list in Scala by two fields?
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217
rows.sortBy(r => (r.lastName, r.firstName))
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Git: How to return from 'detached HEAD' state
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edited Jan 25 '16 at 18:32
answered Aug 3 '12 at 18:20
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Most common way of writing a HTML table with vertical headers?
...in a table should contain an equal number of columns (TD). Your header has 1 while the body has 3. You should use the colspan attribute to fix that.
Reference: "The THEAD, TFOOT, and TBODY sections must contain the same number of columns." - Last paragraph of section 11.2.3.
With that being said, ...
How to use JavaScript variables in jQuery selectors?
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edited Jun 25 '15 at 5:31
answered May 5 '11 at 2:10
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Append a NumPy array to a NumPy array
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In [1]: import numpy as np
In [2]: a = np.array([[1, 2, 3], [4, 5, 6]])
In [3]: b = np.array([[9, 8, 7], [6, 5, 4]])
In [4]: np.concatenate((a, b))
Out[4]:
array([[1, 2, 3],
[4, 5, 6],
[9, 8, 7],
[6, 5, 4...
“Too many values to unpack” Exception
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191
That exception means that you are trying to unpack a tuple, but the tuple has too many values ...
How to apply `git diff` patch without Git installed?
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git diff > patchfile
and
patch -p1 < patchfile
work but as many people noticed in comments and other answers patch does not understand adds, deletes and renames. There is no option but git apply patchfile if you need handle file adds, deletes and rename...
Expanding tuples into arguments
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edited May 27 at 13:31
Nicolas Gervais
13.3k77 gold badges3434 silver badges5656 bronze badges
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Compute a confidence interval from sample data
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168
import numpy as np
import scipy.stats
def mean_confidence_interval(data, confidence=0.95):
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