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Extract a regular expression match
..."aaa12456xxx",test,test+attr(test,"match.length")-1)
I'm sure there is a more elegant way to do this, but this was the fastest way I could find. Alternatively, you can use sub/gsub to strip out what you don't want to leave what you do want.
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Regular expression for a hexadecimal number?
...g with a 0, following by either a lower or uppercase x, followed by one or more characters in the ranges 0-9, or a-f, or A-F
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Is there a CSS selector by class prefix?
...elector for the sake of simplicity. However, the combination above is much more robust.
If you have control over the HTML source or the application generating the markup, it may be simpler to just make the status- prefix its own status class instead as Gumbo suggests.
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How to get error message when ifstream open fails
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Every system call that fails update the errno value.
Thus, you can have more information about what happens when a ifstream open fails by using something like :
cerr << "Error: " << strerror(errno);
However, since every system call updates the global errno value, you may have iss...
psql: FATAL: Ident authentication failed for user “postgres”
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Optional Methods in Java Interface
...synchronization.
Adding this support to the type hierarchy requires four more
interfaces.
Now we're up to twenty or so interfaces and five iterators, and it's
almost certain that there are still collections arising in practice
that don't fit cleanly into any of the interfaces. For examp...
How to insert an element after another element in JavaScript without using a library?
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How to add Web API to an existing ASP.NET MVC 4 Web Application project?
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How do I commit case-sensitive only filename changes in Git?
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In C++, what is a “namespace alias”?
...t agree that this is an entry level question - in fact there have been far more obvious questions asked in the past now with many votes. Having said that, people might feel you're simply trying to gain reputation for yourself. A way round this is to mark one or both of the question/answer as "comm...