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getting date format m-d-Y H:i:s.u from milliseconds
...date("Y-m-d H:i:s",$date_array[1]);
echo "Date: $date:" . $date_array[0]."<br>";
Recommended and use dateTime() class from referenced:
$t = microtime(true);
$micro = sprintf("%06d",($t - floor($t)) * 1000000);
$d = new DateTime( date('Y-m-d H:i:s.'.$micro, $t) );
print $d->format("Y-m-...
Combine two or more columns in a dataframe into a new column with a new name
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Use paste.
df$x <- paste(df$n,df$s)
df
# n s b x
# 1 2 aa TRUE 2 aa
# 2 3 bb FALSE 3 bb
# 3 5 cc TRUE 5 cc
share
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improve ...
How do I use DateTime.TryParse with a Nullable?
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You can't because Nullable<DateTime> is a different type to DateTime.
You need to write your own function to do it,
public bool TryParse(string text, out Nullable<DateTime> nDate)
{
DateTime date;
bool isParsed = DateTime.TryParse...
Vibrate and Sound defaults on notification
I'm trying to get a default vibrate and sound alert when my notification comes in, but so far no luck. I imagine it's something to do with the way I set the defaults, but I'm unsure of how to fix it. Any thoughts?
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Selecting with complex criteria from pandas.DataFrame
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is it possible to filter a pandas dataframe and use the OR operator. For example if there was a column month, could you say df = data['month'==JAN OR 'month' == FEB]? And maybe include a second columns making the query more complex, newdf where ...
How can I decompress a gzip stream with zlib?
...f you don't do this, zlib will complain about a bad stream format. By default, zlib creates streams with a zlib header, and on inflate does not recognise the different gzip header unless you tell it so. Although this is documented starting in version 1.2.1 of the zlib.h header file, it is not in the...
How can I get the concatenation of two lists in Python without modifying either one? [duplicate]
...s the first list. Is there any concatenation function that returns its result without modifying its arguments?
7 Answers
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Is there a git-merge --dry-run option?
...ranches. git merge-tree will execute the merge in memory and print the result to the standard output. Grep for the pattern << or >>. Or you can print the output to a file and check that. If you find a line starting with 'changed in both' then most probably there will be a conflict.
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C++: How to round a double to an int? [duplicate]
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add 0.5 before casting (if x > 0) or subtract 0.5 (if x < 0), because the compiler will always truncate.
float x = 55; // stored as 54.999999...
x = x + 0.5 - (x<0); // x is now 55.499999...
int y = (int)x; // truncated to 55
C++11 also introduces std::round, which likely ...
What is the use of having destructor as private?
...custom memory-manager -- such scenarios may use a private dtor.
#include <iostream>
class a {
~a() {}
friend void delete_a(a* p);
};
void delete_a(a* p) {
delete p;
}
int main()
{
a *p = new a;
delete_a(p);
return 0;
}
...