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Writing a compiler in its own language
...sky. As of version 2.0, the compiler was completely re-written in Scala. From that point on, the old Pizza compiler could be completely discarded, due to the fact that the new Scala compiler could be used to compile itself for future iterations.
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What does FETCH_HEAD in Git mean?
...TCH_HEAD is a short-lived ref, to keep track of what has just been fetched from the remote repository. git pull first invokes git fetch, in normal cases fetching a branch from the remote; FETCH_HEAD points to the tip of this branch (it stores the SHA1 of the commit, just as branches do). git pull th...
Prevent jQuery UI dialog from setting focus to first textbox
...olute positioning. I know you have that class because you are using dialog from jquery-ui and it's in jquery-ui.
<span class="ui-helper-hidden-accessible"><input type="text"/></span>
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Read an Excel file directly from a R script
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Yes. See the relevant page on the R wiki. Short answer: read.xls from the gdata package works most of the time (although you need to have Perl installed on your system -- usually already true on MacOS and Linux, but takes an extra step on Windows, i.e. see http://strawberryperl.com/). Ther...
android start activity from service
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From inside the Service class:
Intent dialogIntent = new Intent(this, MyActivity.class);
dialogIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
startActivity(dialogIntent);
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Cosine Similarity between 2 Number Lists
...utes the distance, and not the similarity. So, you must subtract the value from 1 to get the similarity.
from scipy import spatial
dataSetI = [3, 45, 7, 2]
dataSetII = [2, 54, 13, 15]
result = 1 - spatial.distance.cosine(dataSetI, dataSetII)
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How to make a flat list out of list of lists?
...L-2 times, and so on; total number of copies is I times the sum of x for x from 1 to L excluded, i.e., I * (L**2)/2.
The list comprehension just generates one list, once, and copies each item over (from its original place of residence to the result list) also exactly once.
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How to get a time zone from a location using latitude and longitude coordinates?
There are too many questions on StackOverflow about resolving a time zone from a location. This community wiki is an attempt at consolidating all of the valid responses.
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Delete all documents from index/type without deleting type
I know one can delete all documents from a certain type via deleteByQuery.
15 Answers
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How to open multiple pull requests on GitHub
...mits is:
Isolate them into their own branch.
Open the pull requests from there.
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