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Combine two columns of text in pandas dataframe
...f["period"] = df["Year"].astype(str) + df["quarter"]
Beware of NaNs when doing this!
If you need to join multiple string columns, you can use agg:
df['period'] = df[['Year', 'quarter', ...]].agg('-'.join, axis=1)
Where "-" is the separator.
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What are the security risks of setting Access-Control-Allow-Origin?
... Access-Control-Allow-Origin to * in order to be able to make cross-subdomain ajax calls.
Now I can't help but feel that I'm putting my environment to security risks.
Please help me if I'm doing it wrong.
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How to delete/create databases in Neo4j?
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Perhaps it's a good idea to stop your neo4j server before doing this command.
– John Bachir
Mar 13 '15 at 16:57
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show 6 mo...
What does static_assert do, and what would you use it for?
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This answer doesn't provide any details on what's the difference between assert from <cassert> and static_assert
– bitek
Jan 16 '13 at 15:23
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Using “like” wildcard in prepared statement
... value itself, not in the prepared statement SQL string.
So, this should do for a prefix-match:
notes = notes
.replace("!", "!!")
.replace("%", "!%")
.replace("_", "!_")
.replace("[", "![");
PreparedStatement pstmt = con.prepareStatement(
"SELECT * FROM analysis WHERE note...
What are the differences between concepts and template constraints?
...cally evaluable properties of a type. Purely syntactic requirements. Not a domain abstraction.
Axioms - Semantic requirements of types that are assumed to be true. Not statically checked.
Concepts - General, abstract requirements of algorithms on their arguments. Defined in terms of constraints and ...
Conversion of System.Array to List
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This doesn't work for Array. You need to cast it or call .Cast<> first.
– BlueRaja - Danny Pflughoeft
Jun 21 at 21:49
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What are the downsides to using Dependency Injection? [closed]
...nd one of our lead developers would like to know: What - if any - are the downsides to using the Dependency Injection pattern?
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What exactly does git's “rebase --preserve-merges” do (and why?)
Git's documentation for the rebase command is quite brief:
2 Answers
2
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Modify request parameter with servlet filter
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As you've noted HttpServletRequest does not have a setParameter method. This is deliberate, since the class represents the request as it came from the client, and modifying the parameter would not represent that.
One solution is to use the HttpServletRequestW...