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Sort a Map by values
I am relatively new to Java, and often find that I need to sort a Map<Key, Value> on the values.
58 Answers
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How to merge dictionaries of dictionaries?
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this is actually quite tricky - particularly if you want a useful error message when things are inconsistent, while correctly accepting duplicate but consistent entries (something no other answer here does....)
assuming you don't have huge numbers of ...
Convert two lists into a dictionary
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Like this:
>>> keys = ['a', 'b', 'c']
>>> values = [1, 2, 3]
>>> dictionary = dict(zip(keys, values))
>>> print(dictionary)
{'a': 1, 'b': 2, 'c': 3}
Voila :-) The pairwise dict constructo...
filter items in a python dictionary where keys contain a specific string
I'm a C coder developing something in python. I know how to do the following in C (and hence in C-like logic applied to python), but I'm wondering what the 'Python' way of doing it is.
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Is there a format code shortcut for Visual Studio?
...rtcut, Ctrl + Shift + F , that re-indents code and fixes comments and blank lines. Is there an equivalent for Visual Studio 2010?
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Efficient way to remove keys with empty strings from a dict
I have a dict and would like to remove all the keys for which there are empty value strings.
17 Answers
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TreeMap sort by value
...Map specification:
A Map that further provides a total ordering on its keys.
However, using an external collection, you can always sort Map.entrySet() however you wish, either by keys, values, or even a combination(!!) of the two.
Here's a generic method that returns a SortedSet of Map.Entry...
How to “perfectly” override a dict?
How can I make as "perfect" a subclass of dict as possible? The end goal is to have a simple dict in which the keys are lowercase.
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Sort hash by key, return hash in Ruby
... answered Mar 11 '14 at 2:03
Mark ThomasMark Thomas
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map function for objects (instead of arrays)
... how about this:
var myObject = { 'a': 1, 'b': 2, 'c': 3 };
Object.keys(myObject).map(function(key, index) {
myObject[key] *= 2;
});
console.log(myObject);
// => { 'a': 2, 'b': 4, 'c': 6 }
But you could easily iterate over an object using for ... in:
var myObject = { '...