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How do you push a Git tag to a branch using a refspec?
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edited Jul 15 '13 at 19:45
answered Oct 31 '10 at 2:08
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Pandas dataframe get first row of each group
...;> df.groupby('id').first()
value
id
1 first
2 first
3 first
4 second
5 first
6 first
7 fourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 second
4 5 first
5 6...
How do you sort an array on multiple columns?
...cation name for tiebreaker.
function mysortfunction(a, b) {
var o1 = a[3].toLowerCase();
var o2 = b[3].toLowerCase();
var p1 = a[1].toLowerCase();
var p2 = b[1].toLowerCase();
if (o1 < o2) return -1;
if (o1 > o2) return 1;
if (p1 < p2) return -1;
if (p1 > p2) return 1...
Preferred way to create a Scala list
...end is O(1).
– Daniel C. Sobral
Aug 31 '15 at 19:33
@pgoggijr That is not true. First, there's no "change" anywhere, b...
Rails I18n validation deprecation warning
...precation warning is now displayed both in Rails 4 (>= 4.0.2) and Rails 3.2 (>= 3.2.14). The reason is explained in this commit.
Enforce available locales
When I18n.config.enforce_available_locales is true we'll raise an
I18n::InvalidLocale exception if the passed locale is unavaila...
Best way to make Java's modulus behave like it should with negative numbers?
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edited Sep 13 '14 at 10:44
Maarten Bodewes
76.4k1212 gold badges114114 silver badges213213 bronze badges
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All falsey values in JavaScript
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373
Falsey values in JavaScript
false
Zero of Number type: 0 and also -0, 0.0, and hex form 0x0 ...
How can I convert a zero-terminated byte array to string?
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13 Answers
13
Active
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Standardize data columns in R
I have a dataset called spam which contains 58 columns and approximately 3500 rows of data related to spam messages.
15 ...