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What's the magic of “-” (a dash) in command-line parameters?
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edited Nov 8 '11 at 3:15
answered Nov 8 '11 at 3:09
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UTF-8: General? Bin? Unicode?
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In general, utf8_general_ci is faster than utf8_unicode_ci, but less correct.
Here is the difference:
For any Unicode character set, operations performed using the _general_ci collation are faster than those for the _unicode_ci collati...
Force point (“.”) as decimal separator in java
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edited Jun 17 '16 at 8:16
answered Mar 8 '11 at 17:32
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How does Duff's device work?
...int count; // Set to 20
{
int n = (count + 7) / 8; // n is now 3. (The "while" is going
// to be run three times.)
switch (count % 8) { // The remainder is 4 (20 modulo 8) so
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Apache Spark: map vs mapPartitions?
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Alberto Bonsanto
14.1k88 gold badges5151 silver badges8383 bronze badges
answered Jan 17 '14 at 19:46
Alexey RomanovAlexey ...
How can I delete one element from an array by value
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I think I've figured it out:
a = [3, 2, 4, 6, 3, 8]
a.delete(3)
#=> 3
a
#=> [2, 4, 6, 8]
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in_array multiple values
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Mark ElliotMark Elliot
65.9k1818 gold badges132132 silver badges155155 bronze badges
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Is there an equivalent for the Zip function in Clojure Core or Contrib?
...res a good understanding of the language, though, and the vanilla Haskell 98 probably doesn't support them at all, thus fixed arity functions are preferrable for the standard library.)
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How to select rows from a DataFrame based on column values?
...ne two three two two one three'.split(),
'C': np.arange(8), 'D': np.arange(8) * 2})
print(df)
# A B C D
# 0 foo one 0 0
# 1 bar one 1 2
# 2 foo two 2 4
# 3 bar three 3 6
# 4 foo two 4 8
# 5 bar two 5 10
# 6 foo one 6 12
# 7...
Split delimited strings in a column and insert as new rows [duplicate]
... 1 a
## 2 1 b
## 3 1 c
## 4 2 a
## 5 2 c
## 6 3 b
## 7 3 d
## 8 4 e
## 9 4 f
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