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Does pandas iterrows have performance issues?
I have noticed very poor performance when using iterrows from pandas.
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How many levels of pointers can we have?
How many pointers ( * ) are allowed in a single variable?
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Is there a MySQL option/feature to track history of changes to records?
I've been asked if I can keep track of the changes to the records in a MySQL database. So when a field has been changed, the old vs new is available and the date this took place. Is there a feature or common technique to do this?
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Practical non-image based CAPTCHA approaches?
It looks like we'll be adding CAPTCHA support to Stack Overflow. This is necessary to prevent bots, spammers, and other malicious scripted activity. We only want human beings to post or edit things here!
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Where can I find documentation on formatting a date in JavaScript?
I noticed that JavaScript's new Date() function is very smart in accepting dates in several formats.
35 Answers
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Passing a std::array of unknown size to a function
In C++11, how would I go about writing a function (or method) that takes a std::array of known type but unknown size?
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How do I prompt for Yes/No/Cancel input in a Linux shell script?
I want to pause input in a shell script, and prompt the user for choices.
The standard Yes , No , or Cancel type question.
How do I accomplish this in a typical bash prompt?
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Is there a way to recover from an accidental “svn revert”?
I managed to shoot myself in the foot this morning by doing the following:
10 Answers
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Trimming a huge (3.5 GB) csv file to read into R
So I've got a data file (semicolon separated) that has a lot of detail and incomplete rows (leading Access and SQL to choke). It's county level data set broken into segments, sub-segments, and sub-sub-segments (for a total of ~200 factors) for 40 years. In short, it's huge, and it's not going to fit...