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Python's json module, converts int dictionary keys to strings
...one of those subtle differences among various mapping collections that can bite you. JSON treats keys as strings; Python supports distinct keys differing only in type.
In Python (and apparently in Lua) the keys to a mapping (dictionary or table, respectively) are object references. In Python they...
Repeat Character N Times
... character multiple times by simply appending using a for loop (although a bit less concise).
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How can I count the occurrences of a list item?
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@hugo24: A bit, but it won't be asymptotically faster in the worst case; it will take n * (number of different items) operations, not counting the time it takes to build the set. Using collections.Counter is really much better.
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Group by multiple columns in dplyr, using string vector input
...required in the group_by call, can you edit this answer? right now it's a bit inscrutable.
– Andrew
Jul 8 '15 at 19:33
13
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Do browsers send “\r\n” or “\n” or does it depend on the browser?
...ne (such as a "Bio" for a user's profile) I always end up writing the following paranoid code:
2 Answers
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Input widths on Bootstrap 3
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This wins by far on the answers. It's clean, reusable, and just works. In fact, it should be put in bootstrap by default as this is a very common annoyance. Very rarely do you want pure block forms.
– baweave...
Python: fastest way to create a list of n lists
...p to update an md5 hash an absurdly large amount of times, and I've been a bit obsessed with C loops since then.
– munchybunch
Apr 1 '11 at 20:45
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map vs. hash_map in C++
...terate linearly to wherever you need. Of course this would involve quite a bit of coding and I'm not sure it would pay off unless you need to iterate a lot from and to random access locations.
– sprite
Nov 23 '14 at 22:44
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Multiple returns from a function
...would echo: ONe
If you wanted them both, you could modify the function a bit
function wtf($blahblah = true) {
$var1 = "ONe";
$var2 = "tWo";
if($blahblah === true) {
return $var2;
}
if($blahblah == "both") {
return array($var1, $var2);
}
return $var1;
}
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How to think in data stores instead of databases?
...ties and limitations of the datastore. Restrictions that may have seemed arbitrary probably make more sense.
The key thing here is that although these are restrictions over what you can do in a relational database, these same restrictions are what make it practical to scale up to the sort of magnitu...