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Git: “Not currently on any branch.” Is there an easy way to get back on a branch, while keeping the
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@ErikB Definitely true. :) babay's answer is the valid form of what Alex seems to have been trying to do.
– Benjamin Oakes
Mar 29 '12 at 12:35
add a commen...
Shell command to sum integers, one per line?
...1} END {print s}' mydatafile # DO NOT USE THIS!!
that is because in this form awk uses a 32 bit signed integer representation: it will overflow for sums that exceed 2147483647 (i.e., 2^31).
A more general answer (for summing integers) would be:
awk '{s+=$1} END {printf "%.0f\n", s}' mydatafile #...
How to tag an older commit in Git?
... date of the HEAD commit, and add the tag
GIT_COMMITTER_DATE="$(git show --format=%aD | head -1)" \
git tag -a v1.2 -m"v1.2"
# set HEAD back to whatever you want it to be
git checkout master
Details
The answer by @dkinzer creates tags whose date is the current date (when you ran the git tag comman...
How to sort a list of objects based on an attribute of the objects?
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On large lists you will get better performance using operator.attrgetter('count') as your key. This is just an optimized (lower level) form of the lambda function in this answer.
– David Eyk
Dec 31 '08 at 19:35
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Examples of Algorithms which has O(1), O(n log n) and O(log n) complexities
...en mean the length of input on a Turing machine tape--which makes vertical form of division take exponential time to implement. :-) Each domain has its own requirements and its own precinct of abstracting.
– P Shved
Oct 20 '09 at 5:54
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Best way to extract a subvector from a vector?
...o get a span of 1000 elements of the same type as myvec's. Or a more terse form:
auto my_subspan = gsl::make_span(myvec).subspan(1000000, 1000);
(but I don't like this as much, since the meaning of each numeric argument is not entirely clear; and it gets worse if the length and start_pos are of the...
Xcode 6 Storyboard the wrong size?
...d be the correct answer (at least for those only work on non-Universal platform)
– Raptor
Sep 23 '14 at 3:21
36
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Docker how to change repository name or rename image?
...ry all at once (and remove the old images).
If you have old images of the form:
$ docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
old_name/image_name_1 latest abcdefghijk1 5 minutes ago 1.00GB
old_name/image_name_2...
How can I debug my JavaScript code? [closed]
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All modern browsers come with some form of a built-in JavaScript debugging application. The details of these will be covered on the relevant technologies web pages. My personal preference for debugging JavaScript is Firebug in Firefox. I'm not saying Firebug i...
How to check if a process id (PID) exists
...process exists"
fi
or
if [ -n "$(ps -p $PID -o pid=)" ]
In the latter form, -o pid= is an output format to display only the process ID column with no header. The quotes are necessary for non-empty string operator -n to give valid result.
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