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Different types of thread-safe Sets in Java
...want to be sure all changes are immediately visible to the other threads.
3) ConcurrentSkipListSet is the concurrent SortedSet implementation, with most basic operations in O(log n). It allows concurrent adding/removing and reading/iteration, where iteration may or may not tell about changes since ...
Order discrete x scale by frequency/value
...swer, reorder is the idiomatic way of reordering factor levels.
mtcars$cyl3 <- with(mtcars, reorder(cyl, cyl, function(x) -length(x)))
ggplot(mtcars, aes(cyl3)) + geom_bar()
share
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improve t...
Creating a JavaScript cookie on a domain and reading it across sub domains
... cannot change path
– Enve
Jan 15 '13 at 10:01
7
@Enve - Browsers treat localhost cookies a bit d...
Occurrences of substring in a string
...oking for.
– Stanislav Kniazev
Apr 23 '09 at 12:52
@olivier didnt see that... :( @stan thats absolutely correct... i ...
Symfony 2: How do I check if a user is not logged in inside a template?
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edited Mar 1 '13 at 17:49
Pedro Cordeiro
1,8171818 silver badges3838 bronze badges
answered M...
Python != operation vs “is not”
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310
== is an equality test. It checks whether the right hand side and the left hand side are equal...
Testing if jQueryUI has loaded
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edited Oct 18 '10 at 0:03
Peter Ajtai
52.9k1111 gold badges117117 silver badges138138 bronze badges
an...
How to get the top 10 values in postgresql?
...
392
For this you can use limit
select *
from scores
order by score desc
limit 10
If performance...
Javascript communication between browser tabs/windows [duplicate]
...gt;
<form name="sender">
<input type="text" name="message" size="30" value="">
<input type="reset" value="Clean">
</form>
<script type="text/javascript"><!--
function setCookie(value) {
document.cookie = "cookie-msg-test=" + value + "; path=/";
return true;...
How to create function that returns nothing
... write a function with pl/pgsql .
I'm using PostgresEnterprise Manager v3 and using shell to make a function, but in the shell I must define return type. If I don't define the return type, I'm not able to create a function.
...