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Structs versus classes
... a meaningful, user-focused, relevant performance metric, and then you'll know whether the change has a meaningful effect on real users in relevant scenarios.
Structs consume less heap memory (because they are smaller and more easily compacted, not because they are "on the stack"). But they take lo...
Android Reading from an Input stream efficiently
....readLine()) != null; ) {
total.append(line).append('\n');
}
You can now use total without converting it to String, but if you need the result as a String, simply add:
String result = total.toString();
I'll try to explain it better...
a += b (or a = a + b), where a and b are Strings, copie...
Quickly reading very large tables as dataframes
... implementation that would slow things down. In my case, I am assuming I know the types of the columns ahead of time, the table does not contain any column headers or row names, and does not have any pathological characters that I have to worry about.
...
How can I exclude directories from grep -R?
...gt;/dev/null \;
SOLUTION 2 (using the --exclude-dir option of grep):
You know this solution already, but I add it since it's the most recent and efficient solution. Note this is a less portable solution but more human-readable.
grep -R --exclude-dir=node_modules 'some pattern' /path/to/search
To e...
How to read a .xlsx file using the pandas Library in iPython?
...
In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecated in favor of the above):
dfs = pd.read_excel(file_name, sheetname=None)
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Using Node.js only vs. using Node.js with Apache/Nginx
...ng Node to serve static files is fine in all circumstances as long as you know what you're doing. It is certainly a new paradigm to use the application server to serve static files as so many (every?) competing technologies (PHP, Ruby, Python, etc) require a web server like HTTPD or Nginx in front o...
Good way of getting the user's location in Android
...rk(newer)");
return networkLocation;
}
}
/**
* get the last known location from a specific provider (network/gps)
*/
private Location getLocationByProvider(String provider) {
Location location = null;
if (!isProviderSupported(provider)) {
return null;
}
Locatio...
Share Large, Read-Only Numpy Array Between Multiprocessing Processes
...ing a multiprocessing.RawArray() and mapping NumPy dtype s to ctype s. Now, numpy-sharedmem seems to be the way to go, but I've yet to see a good reference example. I don't need any kind of locks, since the array (actually a matrix) will be read-only. Now, due to its size, I'd like to avoid a ...
What exactly does git's “rebase --preserve-merges” do (and why?)
...we'll take its (their) descendants and replay them on top of new parents
Now we can define C, the set of commits to replay. In particular, it's those commits:
1) reachable from B but not A (as in a normal rebase), and ALSO
2) descendants of the merge base(s)
If we ignore cherry-picks and...
What does principal end of an association means in 1:1 relationship in Entity framework
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@NathanAldenSr the link is bad now, how do you make that change?
– CamHart
Apr 25 '18 at 22:19
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