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How is pattern matching in Scala implemented at the bytecode level?
How is pattern matching in Scala implemented at the bytecode level?
3 Answers
3
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How can I select rows with most recent timestamp for each key value?
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This can de done in a relatively elegant way using SELECT DISTINCT, as follows:
SELECT DISTINCT ON (sensorID)
sensorID, timestamp, sensorField1, sensorField2
FROM sensorTable
ORDER BY sensorID, timestamp DESC;
The above works ...
How do I use a file grep comparison inside a bash if/else statement?
...ing in comments, names that merely start with "master", etc.
This works because the if takes a command and runs it, and uses the return value of that command to decide how to proceed, with zero meaning true and non-zero meaning false—the same as how other return codes are interpreted by the shell...
Where is nodejs log file?
I can't find a place where nodejs log file is stored.
Because in my node server I have "Segmentation fault", I want to look at log file for additional info...
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Pull to refresh UITableView without UITableViewController
...nt a pull to refresh feature in a UITableView within a UIViewController. I can't use a UITableViewController because I want the UITableView to be a smaller subview in the view controller, with some other stuff above it. I assume this is possible, but has anyone seen an implementation of it?
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Take the content of a list and append it to another list
...1, 0, 1, 2, 3, 4]
Since list.extend() accepts an arbitrary iterable, you can also replace
for line in mylog:
list1.append(line)
by
list1.extend(mylog)
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C++ Dynamic Shared Library on Linux
...he virtuals and implement create_object and destroy_object. Your main application would not need to be changed in any way.
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Simplest way to detect a mobile device in PHP
...|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica...
Redirect stdout pipe of child process in Go
...s prints the stdout only after the process has exited. (That's a problem because this server-like program runs for a long time and I want to read the log output)
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How to see full symlink path
...rick.
Alternatively, if you don't have either of the above installed, you can do the following if you have python 2.6 (or later) installed
python -c 'import os.path; print(os.path.realpath("symlinkName"))'
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