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Caveats of select/poll vs. epoll reactors in Twisted
...huge number of file descriptors in a few dozen kilobytes (roughly 20k per 1000 file descriptors, I think). And you can also throw in the fact that you have to spend all 384 of those bytes with select if you only want to monitor one file descriptor but its value happens to be 1024, wheras with epoll...
Copy array items into another array
...a new array.
However, it seems that for large arrays (of the order of 100,000 members or more), this trick can fail. For such arrays, using a loop is a better approach. See https://stackoverflow.com/a/17368101/96100 for details.
var newArray = [];
newArray.push.apply(newArray, dataArray1);
newArra...
Pretty graphs and charts in Python [closed]
... allows you to create are rather limited in size (width * height <= 300,000 pixels). Also, Google Charts (not the Python API) will choke with even modestly sized data sets. Otherwise, they're great.
– Pat Notz
Sep 17 '08 at 4:18
...
CSS Box Shadow - Top and Bottom Only [duplicate]
...lue to <= the negative of the spread value (ex. inset 0px 5px -?px 5px #000; the blur value should be -5 and lower) and to also keep the blur value > 0 when subtracted from the primary positioning value (ex. using the example from above, the blur value should be -9 and up, thus giving us an op...
How do I format a number in Java?
...56.789);
customFormat("###.##", 123456.789);
customFormat("000000.000", 123.78);
customFormat("$###,###.###", 12345.67);
customFormat("\u00a5###,###.###", 12345.67);
Locale currentLocale = new Locale("en", "US");
DecimalFormatSymbols unusualSymbols =...
How to get a Color from hexadecimal Color String
I'd like to use a color from an hexa string such as "#FFFF0000" to (say) change the background color of a Layout.
Color.HSVToColor looks like a winner but it takes a float[] as a parameter.
...
How do I make an HTML text box show a hint when empty?
...h"
onclick="if(this.value=='Search'){this.value=''; this.style.color='#000'}"
onblur="if(this.value==''){this.value='Search'; this.style.color='#555'}" />
Updated: Added the requested coloring-stuff.
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Convert a Unicode string to a string in Python (containing extra symbols)
...de('utf8')
'\xc2\x9c10'
>>> s.encode('utf16')
'\xff\xfe\x9c\x001\x000\x00'
This raw string of bytes can be written to a file. However, note that when reading it back, you must know what encoding it is in and decode it using that same encoding.
When writing to files, you can get rid of th...
socket.error: [Errno 48] Address already in use
...
You already have a process bound to the default port (8000). If you already ran the same module before, it is most likely that process still bound to the port. Try and locate the other process first:
$ ps -fA | grep python
501 81651 12648 0 9:53PM ttys000 0:00.16 python ...
Get program execution time in the shell
... output format.
Example:
$ time sleep 2
real 0m2.009s
user 0m0.000s
sys 0m0.004s
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