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Checking out Git tag leads to “detached HEAD state”

..., a commit, a date specifier, an ordinal specifier or many other things. Now a branch is just like a tag but is movable. When you are "on" a branch and make a commit, the branch is moved to the new commit you made indicating it's current position. Your HEAD is pointer to a branch which is consid...
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Convert Year/Month/Day to Day of Year in Python

...ery simple solution: from datetime import datetime day_of_year = datetime.now().timetuple().tm_yday share | improve this answer | follow | ...
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Checkout multiple git repos into same Jenkins workspace

.... Previously the Multiple SCM plugin could help with this issue but it is now deprecated. From the Multiple SCM plugin page: "Users should migrate to https://wiki.jenkins-ci.org/display/JENKINS/Pipeline+Plugin . Pipeline offers a better way of checking out of multiple SCMs, and is supported by the...
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Website screenshots

...7 years I'm still getting upvotes for this answer, but I guess this one is now much more accurate. Sure you can, but you'll need to render the page with something. If you really want to only use php, I suggest you HTMLTOPS, which renders the page and outputs it in a ps file (ghostscript), then, c...
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Why am I not getting a java.util.ConcurrentModificationException in this example?

... to return another element, it will see that it returned two elements, and now after one element was removed the list only contains two elements. So all is peachy and we are done with iterating. The check for concurrent modifications does not occur, as this is done in the next() method which is neve...
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Else clause on Python while statement

...struct: while condition: handle_true() else: # condition is false now, handle and go on with the rest of the program handle_false() An example might be along the lines of: while value < threshold: if not process_acceptable_value(value): # something went wrong, exit the...
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Peak detection in a 2D array

...measuring pressure under a dogs paw. I use Python for my data analysis and now I'm stuck trying to divide the paws into (anatomical) subregions. ...
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Array extension to remove object by value

...t 2 / Xcode 7 beta 2: As Airspeed Velocity noticed in the comments, it is now actually possible to write a method on a generic type that is more restrictive on the template, so the method could now actually be defined as an extension of Array: extension Array where Element : Equatable { // .....
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Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?

...t Lucene - because I've no idea about that. Sphinx, on the other hand, I know quite well, so let's see if I can be of some help. Result relevance ranking is the default. You can set up your own sorting should you wish, and give specific fields higher weightings. Indexing speed is super-fast, beca...
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Loop through a date range with JavaScript

...ng around with milliseconds. Daylight savings aren't an issue either. var now = new Date(); var daysOfYear = []; for (var d = new Date(2012, 0, 1); d <= now; d.setDate(d.getDate() + 1)) { daysOfYear.push(new Date(d)); } Note that if you want to store the date, you'll need to make a new one...