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ValueError: invalid literal for int() with base 10: ''
...ame)
for line in h:
if line.strip():
[int(next(h).strip()) for _ in range(4)] # list of integers
This way it processes 5 lines at the time. Use h.next() instead of next(h) prior to Python 2.6.
The reason you had ValueError is because int cannot convert an empty string to the integ...
Interface or an Abstract Class: which one to use?
...
I was trying all day to understand the usages of abstract and interface classes, your post made it all clear. Thanks a lot Alan
– afarazit
May 21 '11 at 12:51
...
How do I use shell variables in an awk script?
...o it becomes a part of it.
If you want to make an awk that changes dynamically with use of variables, you can do it this way, but DO NOT use it for normal variables.
variable="line one\nline two"
awk 'BEGIN {print "'"$variable"'"}'
line one
line two
Here is an example of code injection:
variabl...
Why would I make() or new()?
...
Go has multiple ways of memory allocation and value initialization:
&T{...}, &someLocalVar, new, make
Allocation can also happen when creating composite literals.
new can be used to allocate values such as integers, &int is illegal:
new(P...
How do I debug error ECONNRESET in Node.js?
...ity wiki
2 revs, 2 users 67%Suzana_K
4
...
right click context menu for datagridview
...text Menu key).
Cell selection on right mouse click has to be handled manually. Showing the context menu does not need to be handled as this is handled by the UI.
This completely mimics the approach used by Microsoft Excel. If a cell is part of a selected range, the cell selection doesn't change a...
Modifying a subset of rows in a pandas dataframe
...on criteria, columns I want] = value
So Bren's answer is saying 'find me all the places where df.A == 0, select column B and set it to np.nan'
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Why avoid increment (“++”) and decrement (“--”) operators in JavaScript?
...ly creating a temporary object. I find the postfix operator more aesthetically pleasing though.
– mc0e
Jan 11 '14 at 8:22
...
pyplot scatter plot marker size
...This can be a somewhat confusing way of defining the size but you are basically specifying the area of the marker. This means, to double the width (or height) of the marker you need to increase s by a factor of 4. [because A = WH => (2W)(2H)=4A]
There is a reason, however, that the size of mark...
Asynchronously load images with jQuery
...er.com/base64-encoder.html for image encoding.
$.ajax({
url : 'BASE64_IMAGE_REST_URL',
processData : false,
}).always(function(b64data){
$("#IMAGE_ID").attr("src", "data:image/png;base64,"+b64data);
});
Solution2:
Trick the browser to use its cache. This gives you a nice fadeIn() ...