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How to output only captured groups with sed?
...echo "$str" | sed -rn "s/$D*($d+)$D+($d+)$D*/\1 \2/p"
But, as has been already explained, using a s/…/…/gp command is better:
$ str='This is 75577 a sam33ple 123 text and some 987 numbers'
$ d=[[:digit:]] D=[^[:digit:]]
$ echo "$str" | sed -rn "s/$D*($d+)$D*/\1 /gp"
75577 33 123 987
Tha...
WebException how to get whole response with a body?
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var resp = new StreamReader(ex.Response.GetResponseStream()).ReadToEnd();
dynamic obj = JsonConvert.DeserializeObject(resp);
var messageFromServer = obj.error.message;
...
What is PAGEIOLATCH_SH wait type in SQL Server?
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@GregB: if you already have a basic knowledge of SQL, you could read Joe Celko's books (all of them but especially SQL for Smarties and Thinking in Sets) and my blog of course :)
– Quassnoi
Feb 3 '11 at ...
What's the difference between lists and tuples?
... there is the namedtuple in Python, which makes sense because a tuple is already supposed to have structure. This underlines the idea that tuples are a light-weight alternative to classes and instances.
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When to use PNG or JPG in iPhone development?
...ittle extra CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding ...
How to show math equations in general github's markdown(not github's blog)
...e embed code. Svg renders well on resize. HTML allows LaTeX to be easily read when you are looking at the source. Copy the embed code from the bottom of the page and paste it into your markdown.
<img src="https://latex.codecogs.com/svg.latex?\Large&space;x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}...
Why doesn't Ruby support i++ or i-- (increment/decrement operators)?
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Here is how Matz(Yukihiro Matsumoto) explains it in an old thread:
Hi,
In message "[ruby-talk:02706] X++?"
on 00/05/10, Aleksi Niemelä <aleksi.niemela@cinnober.com> writes:
|I got an idea from http://www.pragprog.com:8080/rubyfaq/rubyfaq-5.html#ss5.3
|and thought to try. ...
git replace local version with remote version
... extensive subtrees and instead wish to affect the index directly use
git read-tree remote/branch:subdir/
You can then (optionally) update your working copy by doing
git checkout-index -u --force
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Objective-C: Where to remove observer for NSNotification?
...ed? When do they get send?)
The implementation of the observer (When is it ready to receive notifications? When is it no longer ready?)
The intended life-time of the observer (Is it tied to some other object, say, a view or view controller?)
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So, the best general advice I can come up with: to p...
Reset keys of array elements in php?
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Please do read the manual you're linking to; reset does something else.
– deceze♦
Mar 29 '15 at 13:40
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