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Why were pandas merges in python faster than data.table merges in R in 2012?
...s are still supported. Implements FR#1493, FR#1224
and (partially) FR#951.
New functions chmatch() and %chin%, faster versions of match()
and %in% for character vectors. R's internal string cache is
utilised (no hash table is built). They are about 4 times faster
than match() on the example in ?chma...
How to indicate param is optional using inline JSDoc?
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f5873927%2fhow-to-indicate-param-is-optional-using-inline-jsdoc%23new-answer', 'question_page');
}
);
...
Execute AsyncTask several times
...ask instances can only be used one time.
Instead, just call your task like new MyAsyncTask().execute("");
From the AsyncTask API docs:
Threading rules
There are a few threading rules that must be followed for this class to work properly:
The task instance must be created on the UI thread.
execute(P...
InputStream from a URL
...m() with a proper URL (including the protocol!). E.g.
InputStream input = new URL("http://www.somewebsite.com/a.txt").openStream();
// ...
See also:
Using java.net.URLConnection to fire and handle HTTP requests
share
...
The Guava library: What are its most useful and/or hidden features? [closed]
I have had a quick scan of the Guava API and the new collection types it provides( Multimap and BiMap for example appear useful) and I am thinking of including the library in the project(s) I work on.
...
Check if an image is loaded (no errors) with jQuery
...7 or less. Besides adding a $_GET parameter to the image load, will load a new image everytime, like Gromix suggested.
– SSH This
Jan 14 '13 at 23:51
10
...
Responsive website zoomed out to full width on mobile
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}
);
...
stash@{1} is ambiguous?
...unction () {
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}
);
Po...
How to export table as CSV with headings on Postgresql?
...an also write a query for getting only selected column data.
COPY (select id,name from tablename) TO 'filepath/aa.csv' DELIMITER ',' CSV HEADER;
with admin privilege
\COPY (select id,name from tablename) TO 'filepath/aa.csv' DELIMITER ',' CSV HEADER;
...
Redis strings vs Redis hashes to represent JSON: efficiency?
...is).configure( hash_max_ziplist_value: 64, hash_max_ziplist_entries: 512 ).new
=> #<Redis client v4.0.1 for redis://127.0.0.1:6379/0>
> redis.flushdb
=> "OK"
> ap redis.info(:memory)
{
"used_memory" => "529512",
**"used_memory_human" => ...