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Replacing NAs with latest non-NA value
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na.locf(bz, fromLast = TRUE)
1 2 3 4 5 6
2 1 1 4 5 2
cz <- zoo(c(NA,9,3,2,3,2))
na.locf(cz)
2 3 4 5 6
9 3 2 3 2
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What's the result of += in C and C++?
...emantics of the compound assignment operators is different in C and C++:
C99 standard, 6.5.16, part 3:
An assignment operator stores a value in the object designated by the left operand. An
assignment expression has the value of the left operand after the assignment, but is not an
lvalue.
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Best way to disable button in Twitter's Bootstrap [duplicate]
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answered Jun 26 '13 at 18:29
Samuel RobertSamuel Robert
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Is it considered bad practice to perform HTTP POST without entity body?
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edited Jul 1 '19 at 11:03
Gerard Bosch
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ans...
Is “ ” a replacement of “ ”?
...bramsIgnacio Vazquez-Abrams
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Create PostgreSQL ROLE (user) if it doesn't exist
How do I write an SQL script to create a ROLE in PostgreSQL 9.1, but without raising an error if it already exists?
10 Answ...
How is “int main(){(([](){})());}” valid C++?
... XeoXeo
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Inconsistent accessibility: property type is less accessible
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answered Dec 1 '12 at 14:29
Ravindra BagaleRavindra Bagale
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Way to read first few lines for pandas dataframe
... files
which seems to work. Using one of the standard large test files (988504479 bytes, 5344499 lines):
In [1]: import pandas as pd
In [2]: time z = pd.read_csv("P00000001-ALL.csv", nrows=20)
CPU times: user 0.00 s, sys: 0.00 s, total: 0.00 s
Wall time: 0.00 s
In [3]: len(z)
Out[3]: 20
In [4...
How to forward declare a C++ template class?
.... See my answer.
– Elliott
Dec 13 '19 at 6:43
I disagree. The standard says: "A template-parameter shall not be given ...