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Changing column names of a data frame
... Thank you. I think this is somehow annoying with R: Why is it so difficult to change the column name if you do not want to use the index number but the old name :(
– Arne
Mar 18 '14 at 14:41
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“Prevent saving changes that require the table to be re-created” negative effects
...lar Are there any negative effects / possible drawbacks of doing this? and If so, is the table copy a 100% exact replica of the source table?. Do you have any information regarding those questions?
– tfrascaroli
Jun 14 '17 at 9:33
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Is there StartsWith or Contains in t sql with variables?
I am trying to detect if the server is running Express Edition.
3 Answers
3
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How to compute the similarity between two text documents?
... will return normalized tf-idf
pairwise_similarity = tfidf * tfidf.T
or, if the documents are plain strings,
>>> corpus = ["I'd like an apple",
... "An apple a day keeps the doctor away",
... "Never compare an apple to an orange",
... "I prefer scikit-lea...
Calculate number of hours between 2 dates in PHP
How do I calculate the difference between two dates in hours?
16 Answers
16
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What is aspect-oriented programming?
...oss-cutting concerns, which would be any kind of code that is repeated in different methods and can't normally be completely refactored into its own module, like with logging or verification. So, with AOP you can leave that stuff out of the main code and define it vertically like so:
function mainP...
How to get the current directory in a C program?
...io.h>
#include <limits.h>
int main() {
char cwd[PATH_MAX];
if (getcwd(cwd, sizeof(cwd)) != NULL) {
printf("Current working dir: %s\n", cwd);
} else {
perror("getcwd() error");
return 1;
}
return 0;
}
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Adding minutes to date time in PHP
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With date: 2011-11-18 00:00 if I add 5 mins, I get 2012-04-18 00:00 as a result. ` $time = new DateTime($_REQUEST['start']); $time->add(new DateInterval('P' . $duration . 'M')); $endTime = $time->format('Y-m-d H:i'); echo $endTime; ` Applogies f...
Comparing two dataframes and getting the differences
...rames axes are compared with _indexed_same method, and exception is raised if differences found, even in columns/indices order.
If I got you right, you want not to find changes, but symmetric difference. For that, one approach might be concatenate dataframes:
>>> df = pd.concat([df1, df2]...
Hand Coded GUI Versus Qt Designer GUI [closed]
...oing everything by hand henceforth.
Qt4
Qt4 has improved on Designer significantly. No longer does it only generate code, but you can dynamically load in your Designer files (in xml) and dynamically connect them to the running objects in your program -- no generated code however, you do have to na...