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How to change column datatype from character to numeric in PostgreSQL 8.4
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You can try using USING:
The optional USING clause specifies how to compute the new column value from the old; if omitted, the default conversion is the same as an assignment cast from old data type to new. A USING clause must be provided if there is no implicit or assignment cas...
Why do I need 'b' to encode a string with Base64?
... string of 8-bit bytes. You create those in Python 3 with the b'' syntax.
If you remove the b, it becomes a string. A string is a sequence of Unicode characters. base64 has no idea what to do with Unicode data, it's not 8-bit. It's not really any bits, in fact. :-)
In your second example:
>>...
Using ping in c#
.../ Discard PingExceptions and return false;
}
finally
{
if (pinger != null)
{
pinger.Dispose();
}
}
return pingable;
}
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How can I combine two commits into one commit? [duplicate]
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You want to git rebase -i to perform an interactive rebase.
If you're currently on your "commit 1", and the commit you want to merge, "commit 2", is the previous commit, you can run git rebase -i HEAD~2, which will spawn an editor listing all the commits the rebase will traverse. You ...
Tracing XML request/responses with JAX-WS
...Handler<SOAPMessageContext> {
// change this to redirect output if desired
private static PrintStream out = System.out;
public Set<QName> getHeaders() {
return null;
}
public boolean handleMessage(SOAPMessageContext smc) {
logToSystemOut(smc);
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Why am I seeing an “origin is not allowed by Access-Control-Allow-Origin” error here? [duplicate]
...cript cannot contact a remote server and send sensitive data.
jsonp is a different way to use javascript. You make a request and results are encapsulated into a callback function which is run in the client. It's the same as linking a new script tag into the head part of your html (you know that you...
Purpose of Trigraph sequences in C++?
...ou'll spend the rest of the day cursing their existance). It would be nice if compilers could be configured to warn (or error) when it comes across a trigraph or digraph, so I could know I've got something I should knowingly deal with.
And just for completeness, digraphs are much less dangerous sin...
Convert decimal to hexadecimal in UNIX shell script
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echo "obase=16; 34" | bc
If you want to filter a whole file of integers, one per line:
( echo "obase=16" ; cat file_of_integers ) | bc
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What Every Programmer Should Know About Memory?
... makes the paper essential for anyone involved in: game development, scientific computing, finance, databases, compilers, processing of large datasets, visualization, anything that has to handle lots of requests... So yes, if you are working in an application that is idle most of the time, like a te...
Where in a virtualenv does the custom code go?
...rectory structure should one follow when using virtualenv ? For instance, if I were building a WSGI application and created a virtualenv called foobar I would start with a directory structure like:
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