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What is the advantage of using forwarding references in range-based for loops?
...This last case of mine should really be a template to make sense. If you know the loop is always handling a proxy reference, then auto would work as well as auto&&. But when the loop was sometimes handling non-proxy references and sometimes proxy-references, then I think auto&& wou...
Rename specific column(s) in pandas
...x
1 x x x
2 x x x
3 x x x
4 x x x
With 0.21+, you can now specify an axis parameter with rename:
df.rename({'gdp':'log(gdp)'}, axis=1)
# df.rename({'gdp':'log(gdp)'}, axis='columns')
y log(gdp) cap
0 x x x
1 x x x
2 x x x
3 x x x
4...
How to move all files including hidden files into parent directory via *
... "Just ignore the warning" may not always be a good idea. Right now I'm having a problem with a script in which I need to stop execution if any step fails - since this solution always causes an error, it kills my script. I need a way to determine if the mv command failed or not...
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URL matrix parameters vs. query parameters
...is a very useful feature of uri templates; just because most people don't know about or use it doesn't mean it's some evil conspiracy by angular devs to inject useless complexity into your life.
– Ajax
Mar 22 '17 at 20:36
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How to reverse a string in Go?
... Wow, wtf is up with the double assignment when reversing? Interesting. Now, think about a string with an uneven number of runes. The middle one gets special treatment, with the correct end-result after all though. :) An interesting little optimization I wouldn’t have thought of right away.
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How to save as a new file and keep working on the original one in Vim?
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Thanks for the answers. Now I know that there are two ways of "SAVE AS" in Vim.
Assumed that I'm editing hello.txt.
:w world.txt will write hello.txt's content to the file world.txt while keeping hello.txt as the opened buffer in vim.
:sav world...
When to use an object instance variable versus passing an argument to the method
...s.
Here's an example:
myCircle = myDrawing.drawCircle(center, radius);
Now lets imaging the myDrawing class uses 15 helper functions to create the myCircle object and each of those functions will need the center and the radius. They should still not be set as instance variables of the myDrawing...
Difference between app.use and app.get in express.js
... Mar 24 '13 at 17:44
Jonathan LonowskiJonathan Lonowski
108k3131 gold badges188188 silver badges191191 bronze badges
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What's the difference between an exclusive lock and a shared lock?
...hing while someone else is reading it, what then would they read? I don't know why you chose to pick out a "re-entrant" read-write lock specifically, but re-entrancy means that the owner of a re-entrant lock can 'lock()' it again and all subsequent lock() calls after the first one will return immedi...
Once upon a time, when > was faster than < … Wait, what?
...o your tutorial in my question has gone dead. Could you please let us all know where have the tutorials move and optionally edit the question, please?
– Armen Tsirunyan
Mar 24 '15 at 12:57
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