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How do I read the first line of a file using cat?
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There are many different ways:
sed -n 1p file
head -n 1 file
awk 'NR==1' file
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Utility classes are evil? [closed]
... should represent a single thing and all of its attributes and operations. If you are operating on a thing, that method should probably be a member of that thing.
However, there are times when you can use utility classes to group a number of methods together — an example being the java.util.Colle...
Index all *except* one item in python
... # [9, 8, 7, 6, 5, 4, 3, 2, 1, 0]
b = [x for i,x in enumerate(a) if i!=3] # [9, 8, 7, 5, 4, 3, 2, 1, 0]
This is very general, and can be used with all iterables, including numpy arrays. If you replace [] with (), b will be an iterator instead of a list.
Or you could do this in-place ...
How do I redirect in expressjs while passing some context?
I am using express to make a web app in node.js. This is a simplification of what I have:
8 Answers
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Exception handling in R [closed]
...wordpress/?p=15.
for(i in 1:16){
result <- try(nonlinear_modeling(i));
if(class(result) == "try-error") next;
}
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echo that outputs to stderr
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FYI: if you want to format or do anything besides simply echo the string then you'll have to move the redirect back to the end. For example errcho(){ >&2 echo $@|pr -To5;} won't work. To do something like that you'll have...
Why does only the first line of this Windows batch file execute but all three lines execute in a com
...new window to spawn, and each of the three commands will run in parallel. If you need them to run synchronously, use call.
– akf
Oct 27 '10 at 19:33
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Does the order of LINQ functions matter?
...NQ provider in use. For LINQ to Objects, that could certainly make a huge difference. Assume we've actually got:
var query = myCollection.OrderBy(item => item.CreatedDate)
.Where(item => item.Code > 3);
var result = query.Last();
That requires the whole collectio...
Getting Git to work with a proxy server - fails with “Request timed out”
...n your proxy server
Note that this works for both http and https repos.
If you decide at any time to reset this proxy and work without proxy:
Command to use:
git config --global --unset http.proxy
Finally, to check the currently set proxy:
git config --global --get http.proxy
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PHP, get file name without file extension
... is absolutely correct. pathinfo operates on strings, so it doesn't matter if the file is actually on the server or not.
– Gordon
Feb 2 '10 at 11:22
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