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Add up a column of numbers at the Unix shell
Given a list of files in files.txt , I can get a list of their sizes like this:
20 Answers
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Swift Beta performance: sorting arrays
I was implementing an algorithm in Swift Beta and noticed that the performance was very poor. After digging deeper I realized that one of the bottlenecks was something as simple as sorting arrays. The relevant part is here:
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Python - List of unique dictionaries
Let's say I got a list of dictionaries:
18 Answers
18
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Vim: Move window left/right?
In Vim, is it possible to “move” a window to the left or right? Eg, similar to <c-w> r or <c-w> x , but left/right instead of up/down?
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Sorting a vector of custom objects
...ut sorting a vector containing custom (i.e. user defined) objects.
Probably, standard STL algorithm sort along with a predicate (a function or a function object) which would operate on one of the fields (as a key for sorting) in the custom object should be used.
Am I on the right track?
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Append an object to a list in R in amortized constant time, O(1)?
If I have some R list mylist , you can append an item obj to it like so:
17 Answers
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Python loop that also accesses previous and next values
How can I iterate over a list of objects, accessing the previous, current, and next items? Like this C/C++ code, in Python?
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In Java, how do I convert a byte array to a string of hex digits while keeping leading zeros? [dupli
...s[j + 1])); } return result; }
– cn1h
Nov 3 '12 at 20:16
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