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Insert, on duplicate update in PostgreSQL?
...mple 38-2. Exceptions with UPDATE/INSERT
This example uses exception handling to perform either UPDATE or INSERT, as appropriate:
CREATE TABLE db (a INT PRIMARY KEY, b TEXT);
CREATE FUNCTION merge_db(key INT, data TEXT) RETURNS VOID AS
$$
BEGIN
LOOP
-- first try to update the key...
Output array to CSV in Ruby
.... If you don't specify this, it'll default to "rb" (read-only binary mode) and you would get an error when trying to add to your csv file. See ruby-doc.org/core-1.9.3/IO.html for a list of valid file modes in Ruby.
– Dylan Markow
Jul 16 '12 at 14:08
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A html space is showing as %2520 instead of %20
... as %25.
The way you get %2520 is when your url already has a %20 in it, and gets urlencoded again, which transforms the %20 to %2520.
Are you (or any framework you might be using) double encoding characters?
Edit:
Expanding a bit on this, especially for LOCAL links. Assuming you want to link t...
Why does z-index not work?
So if I understand z-index correctly, it would be perfect in this situation:
4 Answers
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How do I print the elements of a C++ vector in GDB?
..., 30}
To achieve above, you need to have gdb 7 (I tested it on gdb 7.01) and some python pretty-printer. Installation process of these is described on gdb wiki.
What is more, after installing above, this works well with Eclipse C++ debugger GUI (and any other IDE using GDB, as I think).
...
How to check whether a file or directory exists?
...(err) { return false, nil }
return false, err
}
Edited to add error handling.
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AngularJS ng-if with multiple conditions
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If I have 20 input fields and I have to enable submit button only if all fields are filled. In this case, I have to include so many conditions. This is little bit confusing. Is there any other feasible solution?
– Mr_Perfect
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How to return a file using Web API?
...t, because as soon as the variable goes out of scope, .NET will dispose it and you'll get error messages about the underlying connection being closed.
– Brandon Montgomery
Sep 26 '12 at 21:44
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What is difference between functional and imperative programming languages?
...object-oriented programming (OOP) languages such as C#, Visual Basic, C++, and Java were designed to primarily support imperative (procedural) programming, whereas Haskell/gofer like languages are purely functional. Can anybody elaborate on what is the difference between these two ways of programmin...
What does SynchronizationContext do?
...alling the static SynchronizationContext.SetSynchronizationContext method, and the current context of the running thread can be queried via the SynchronizationContext.Current property.
Despite what I just wrote (each thread having an associated synchronization context), a SynchronizationContext does...