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How to output only captured groups with sed?
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The key to getting this to work is to tell sed to exclude what you don't want to be output as well as specifying what you do want.
string='This is a sample 123 text and some 987 numbers'
echo "$string" | sed -rn 's/[^[:digit:]]*([[:digit:]]+)[^[:digit:]]+([[:digit:]]+)[^[:digit:]]*...
How to limit setAccessible to only “legitimate” uses?
....lang.reflect.AccessibleObject.setAccessible , the more astonished I am at what it can do. This is adapted from my answer to the question ( Using reflection to change static final File.separatorChar for unit testing ).
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How to get the filename without the extension in Java?
...ibrary code where they probably have thought of all special cases, such as what happens if you pass in null or dots in the path but not in the filename, you can use the following:
import org.apache.commons.io.FilenameUtils;
String fileNameWithOutExt = FilenameUtils.removeExtension(fileNameWithExt);...
Why is C so fast, and why aren't other languages as fast or faster? [closed]
...t's "close to the machine." Leaving the former assertion for another post, what is special about C that allows it to be faster than other languages? Or put another way: what's to stop other languages from being able to compile down to binary that runs every bit as fast as C?
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JavaScript naming conventions [closed]
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Crockford doesn't go into this level of detail, but what about variables that happen to start with a capital letter, because they refer to an acronym - should the first letter, or the entire acronym be lowercased? Example: ECBhandle vs. ecbHandle (it does not matter what ECB m...
Does have to be in the of an HTML document?
...author portion of the spec, I consider body styles to be valid. github.com/whatwg/html/issues/1605#issuecomment-235961103
– WraithKenny
Nov 29 '17 at 22:19
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What is the best way to force yourself to master vi? [closed]
...ck with it.
I've been using Vim for so long that I don't even think about what keys to press to search or navigate or save. And my hands never leave the keyboard. To use Vim is one of the best choices I've made in my programming career.
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What is the easiest/best/most correct way to iterate through the characters of a string in Java?
...h(); i++){
char c = s.charAt(i);
//Process char
}
That's what I would do. It seems the easiest to me.
As far as correctness goes, I don't believe that exists here. It is all based on your personal style.
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Fastest way to count exact number of rows in a very large table?
..., but it's slow. You can either have exact & slow, or rough and quick. What you do will depend on what's more important for the purpose you need the count for. NO LOCK might include or indeed exclude rows that are mid-transaction or moving pages for whatever reason.
– Davos...
What components are MVC in JSF MVC framework?
... bean scope to choose
Passing a JSF2 managed pojo bean into EJB or putting what is required into a transfer object
Filter do not initialize EntityManager
javax.persistence.TransactionRequiredException in small facelet application
In the book The Definitive Guide to JSF in Java EE 8, in chapter 8 "...