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How should I read a file line-by-line in Python?
In pre-historic times (Python 1.4) we did:
4 Answers
4
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Find XOR of all numbers in a given range
...e every 4. So, that's how to arrive at that little lookup table.
Now, consider for a general range of [a,b]. We can use f() to find the XOR for [0,a-1] and [0,b]. Since any value XOR'd with itself is zero, the f(a-1) just cancels out all the values in the XOR run less than a, leaving you with the X...
How to get the first column of a pandas DataFrame as a Series?
...PI change; I'm honestly surprised by the number of votes for this answer, didn't think it was that useful to people...
– herrfz
Apr 18 '16 at 16:06
...
How to exclude certain directories/files from git grep search
...s entirely within (modern versions of) git now.
– David
Nov 16 '15 at 15:12
Why the downvotes? This answer still appli...
Saving changes after table edit in SQL Server Management Studio
...ant databases. I have seen it make costly mistakes on many occasions. Besides, it promotes lazy development habits and allows people to modify database structure who may not be proficient enough to do so if they can't manage the SQL code route.
– Mark W Dickson
...
'uint32_t' identifier not found error
...ode on my page. But it shows this error "syntax error : missing ';' before identifier 'int32_t'" and "missing type specifier - int assumed. Note: C++ does not support default-int".
– kevin
Mar 2 '11 at 2:40
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Auto-center map with multiple markers in Google Maps API v3
...the map is done scaling
var listener = google.maps.event.addListener(map, "idle", function () {
map.setZoom(3);
google.maps.event.removeListener(listener);
});
This way, you can use an arbitrary number of points, and don't need to know the order beforehand.
Demo jsFiddle here: http://jsfi...
Why is it possible to recover from a StackOverflowError?
...nt of which exception is thrown and why. Since you catch the exception outside of the first call to foo(), the thousands of foo stack frames that filled the stack have all been unwound and most of the stack is free to be used again.
...
Get value from JToken that may not exist (best practices)
...ou want if you combine it with nullable value types and the ?? operator:
width = jToken.Value<double?>("width") ?? 100;
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What are the disadvantages to declaring Scala case classes?
...t the good bits:
Everything immutable by default
Yes, and can even be overridden (using var) if you need it
Getters automatically defined
Possible in any class by prefixing params with val
Decent toString() implementation
Yes, very useful, but doable by hand on any class if necessary
Compliant equal...