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In Perl, how can I read an entire file into a string?
I'm trying to open an .html file as one big long string. This is what I've got:
16 Answers
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How to create unit tests easily in eclipse [closed]
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@TheresaForster Which one you like? This answer or the one given by fastcodejava?
– javaguy
Dec 18 '11 at 22:44
2
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git add, commit and push commands in one?
Is there any way to use these three commands in one?
32 Answers
32
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Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
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When you do len(df['column name']) you are just getting one number, namely the number of rows in the DataFrame (i.e., the length of the column itself). If you want to apply len to each element in the column, use df['column name'].map(len). So try
df[df['column name'].map(len) &...
Reading a huge .csv file
... row
count += 1
elif count:
# done when having read a consecutive series of rows
return
I also simplified your filter test; the logic is the same but more concise.
Because you are only matching a single sequence of rows matching the cri...
Is there hard evidence of the ROI of unit testing?
...is good evidence that this is not the case. Fixing post-release bugs is exponentially more expensive than bugs found early in development (which is what TDD does). In that context, a cost of 0.01% of total development for all post-release bugs seems unlikely. (For details see Code Complete, in parti...
Replace non-ASCII characters with a single space
...n([i if ord(i) < 128 else ' ' for i in text])
This handles characters one by one and would still use one space per character replaced.
Your regular expression should just replace consecutive non-ASCII characters with a space:
re.sub(r'[^\x00-\x7F]+',' ', text)
Note the + there.
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Is mathematics necessary for programming? [closed]
... is what got us there. Even more amazing is the beauty of these formulas. One small PDE expression can translate to a few pages of code. Without the initial formula it's difficult to see how you'd ever end up with it.
– Joe
Dec 18 '11 at 16:10
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What is the most efficient/elegant way to parse a flat table into a tree?
...tore all paths in the Closure Table, where there is a direct ancestry from one node to another. Include a row for each node to reference itself. For example, using the data set you showed in your question:
INSERT INTO ClosureTable (ancestor_id, descendant_id) VALUES
(1,1), (1,2), (1,4), (1,6),
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Thread context switch Vs. process context switch
Could any one tell me what is exactly done in both situations? What is the main cost each of them?
10 Answers
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