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What is the difference between LR, SLR, and LALR parsers?
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SLR, LALR and LR parsers can all be implemented using exactly the same table-driven machinery.
Fundamentally, the parsing algorithm collects the next input token T, and consults the current state S (and associated lookahead, GOTO, and reduction tables...
jquery input select all on focus
I'm using this code to try and select all of the text in the field when a user focuses on the field. What happens is, it selects all for a second, then its unselected and the typing cursor is left where I clicked...
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Rails server says port already used, how to kill that process?
...you're looking to kill whatever is on port 3000 (which is what webrick normally uses), type this in your terminal to find out the PID of the process:
$ lsof -wni tcp:3000
Then, use the number in the PID column to kill the process:
$ kill -9 PID
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How to get names of classes inside a jar file?
I have a JAR file and I need to get the name of all classes inside this JAR file. How can I do that?
12 Answers
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Visual Studio TFS shows unchanged files in the list of pending changes
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This is normal if a file becomes automatically checked out due to a change, and if ultimately the contents of the file are changed back to it's original state. At that point you would see the message about identical contents upon comparison.
This blog entry descr...
Can't resize UIView in IB
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uuuugh I really dislike this IDE
– Saik Caskey
May 26 '17 at 15:46
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deleting rows in numpy array
... Thanks! I had the same problem, and I could not figure out why simply calling numpy.delete(x, index) didn't work.
– Antimony
Nov 20 '15 at 22:59
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Suppress warning CS1998: This async method lacks 'await'
...ave anything to await, and some might just throw. It's a bit annoying with all the warnings.
14 Answers
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How to select rows with no matching entry in another table?
... t2.ID IS NULL
The key points are:
LEFT JOIN is used; this will return ALL rows from Table1, regardless of whether or not there is a matching row in Table2.
The WHERE t2.ID IS NULL clause; this will restrict the results returned to only those rows where the ID returned from Table2 is null - in o...
Exclude all transitive dependencies of a single dependency
...stom pom instead of the typical artifact. While that does not necessarily allow you exclude all transitive dependencies with a single <exclusion>, it does allow you only have to write your dependency once and all of your projects don't need to maintain unnecessary and long exclusion lists.
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