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What is the difference between NULL, '\0' and 0?
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edited Oct 24 '16 at 8:27
community wiki
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Why isn't my Pandas 'apply' function referencing multiple columns working? [closed]
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Seems you forgot the '' of your string.
In [43]: df['Value'] = df.apply(lambda row: my_test(row['a'], row['c']), axis=1)
In [44]: df
Out[44]:
a b c Value
0 -1.674308 foo 0.343801 0.044698
1 -2.163236 bar -2.04...
Delete files or folder recursively on Windows CMD
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answered Oct 9 '14 at 14:09
DGuntojuDGuntoju
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private[this] vs private
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answered Mar 14 '12 at 9:14
Alexey RomanovAlexey Romanov
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Creating an R dataframe row-by-row
...de in R.
If you can, allocate your entire data.frame up front:
N <- 1e4 # total number of rows to preallocate--possibly an overestimate
DF <- data.frame(num=rep(NA, N), txt=rep("", N), # as many cols as you need
stringsAsFactors=FALSE) # you don't know levels yet...
How can I check if a single character appears in a string?
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edited Mar 22 at 12:40
Ömer Erden
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C++ Convert string (or char*) to wstring (or wchar_t*)
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244
Assuming that the input string in your example (おはよう) is a UTF-8 encoded (which it isn'...
static function in C
... (basically same .c file) as f1 */
}
int f2(int foo) {
return 42 + foo;
}
main.c:
int f1(int); /* prototype */
int f2(int); /* prototype */
int main(void) {
f1(10); /* ok, f1 is visible to the linker */
f2(12); /* nope, f2 is not visible to the linker */
return 0;
}
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AngularJS - $anchorScroll smooth/duration
...breton/angular-smoothscroll
https://gist.github.com/justinmc/d72f38339e0c654437a2
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Determine the data types of a data frame's columns
...st few values of each variable):
str(my.data)
'data.frame': 5 obs. of 4 variables:
$ y : num 1.03 1.599 -0.818 0.872 -2.682
$ x1: int 1 2 3 4 5
$ x2: logi TRUE TRUE FALSE FALSE FALSE
$ X3: Factor w/ 5 levels "a","b","c","d",..: 1 2 3 4 5
@Gavin Simpson's approach is also streamlined, but p...