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Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
...ity in Java:
http://jeremymanson.blogspot.com/2008/04/immutability-in-java.html
Part 2 on Immutability in Java:
http://jeremymanson.blogspot.com/2008/07/immutability-in-java-part-2.html
Part 3 on Immutability in Java:
http://jeremymanson.blogspot.com/2008/07/immutability-in-java-part-3.html
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Cluster analysis in R: determine the optimal number of clusters
...ed error (SSE) scree plot. See http://www.statmethods.net/advstats/cluster.html & http://www.mattpeeples.net/kmeans.html for more. The location of the elbow in the resulting plot suggests a suitable number of clusters for the kmeans:
mydata <- d
wss <- (nrow(mydata)-1)*sum(apply(mydata,2,...
Deleting all pending tasks in celery / rabbitmq
...>> app.control.purge()
http://docs.celeryproject.org/en/latest/faq.html#how-do-i-purge-all-waiting-tasks
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...
Center a position:fixed element
...t the center towards the middle of the div.
Thus, provided a <!DOCTYPE html> (standards mode), this should do:
position: fixed;
width: 500px;
height: 200px;
top: 50%;
left: 50%;
margin-top: -100px; /* Negative half of height. */
margin-left: -250px; /* Negative half of width. */
Or, if you...
UnicodeEncodeError: 'charmap' codec can't encode - character maps to , print function [du
...etwriter('cp850')(sys.stderr.buffer, 'strict')
If used in CGI outputting HTML you can replace 'strict' by 'xmlcharrefreplace' to get HTML encoded tags for non-printable characters.
Feel free to modify the approaches, setting different encodings, .... Note that it still wont work to output non-spe...
How can I find the number of arguments of a Python function?
... This is deprecated in Python 3: docs.python.org/3/library/inspect.html#inspect.getargspec
– noisecapella
Feb 8 '16 at 19:15
...
CSS vertical alignment text inside li
...ever used it though. Take a look here: phrogz.net/css/vertical-align/index.html
– Logan Serman
Dec 17 '11 at 16:34
Gre...
Chrome ignores autocomplete=“off”
...ocomplete of a field (it's not the right way to do it, but it works):
1.
HTML:
<input type="password" id="some_id" autocomplete="new-password">
JS (onload):
(function() {
var some_id = document.getElementById('some_id');
some_id.type = 'text';
some_id.removeAttribute('autocom...
Twitter Bootstrap - add top space between rows
... This one is more usable as it embraces the "name your class style so your html reads easier" and you can read margin-top in the html instead of rowSpecificForName. This answer is more inline with twitter bootstrap patterns.
– Dean Hiller
May 14 '13 at 3:04
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Difference between BeautifulSoup and Scrapy crawler?
...s using the python subprocess module (docs.python.org/2/library/subprocess.html). As i said never try this, but perhaps it could work... just a note, use the log message from scrapy just for you to know where erros might happen on your crawler (from scrapy import log).
– rdena...