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Why were pandas merges in python faster than data.table merges in R in 2012?
...re-computed indexes for various columns to accelerate operations like data selection and merges. In this case (database joins) pandas' DataFrame contains no pre-computed information that is being used for the merge, so to speak it's a "cold" merge. If I had stored the factorized versions of the join...
Easiest way to toggle 2 classes in jQuery
... match the elements that expose either class, you can use a multiple class selector and write:
$(".A, .B").toggleClass("A B");
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What's the best way to break from nested loops in JavaScript?
... Overflow have a feature to let the community override the obviously wrong selected answer? :/
– Matt Huggins
Aug 26 '14 at 23:40
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Updating MySQL primary key
...e, user_interactions u write, user_interactions write;
insert into fixit
select user_2, user_1, type, max(timestamp), count(*) n from user_interactions u
group by user_2, user_1, type
having n > 1;
delete u from user_interactions u, fixit
where fixit.user_2 = u.user_2
and fixit.user_1 = u...
What is in your .vimrc? [closed]
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is there any way to select from more colors?
– Fzs2
Aug 13 '10 at 10:13
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How do you use vim's quickfix feature?
... <Enter> :.cc | wincmd p<CR> (again untested) and use Enter to select an error without switching out of the quickfix window.
– DrAl
Nov 17 '09 at 9:45
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MVC4 style bundle giving 403
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Also in the select2 nuget package.
– Tetsujin no Oni
Jan 21 '15 at 14:01
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SQL Server Escape an Underscore
...expected. Instead of trying to hassle with it, I went with a work around:
select * from information_schema.columns
where replace(table_name,'_','!') not like '%!%'
order by table_name
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How to add default value for html ? [closed]
...ontrol" rows="3" name="msg" placeholder="Your message here." onfocus='this.select()'>
<?php if (isset($_POST['encode'])) { echo htmlspecialchars($_POST['msg']);} ?>
</textarea>
In this case, $_POST['encode'] came from this:
<input class="input_bottom btn btn-default" type="submi...
Intellij IDEA show javadoc automatically
...s)
It's only available when you press CTRL+SPACE It's more usable if you select the pin icon when it popups. The documentation window will be added to the tabs on the right. Later on I recommend to resize the window and to uncheck the Pinned property.
On mouse hover:
File -> Settings -> E...