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What would cause an algorithm to have O(log n) complexity?
My knowledge of big-O is limited, and when log terms show up in the equation it throws me off even more.
6 Answers
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Hashing a dictionary?
For caching purposes I need to generate a cache key from GET arguments which are present in a dict.
11 Answers
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How can I sort a dictionary by key?
...way to go from {2:3, 1:89, 4:5, 3:0} to {1:89, 2:3, 3:0, 4:5} ?
I checked some posts but they all use the "sorted" operator that returns tuples.
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Add single element to array in numpy
...s a new array which can be the old array with the appended element.
I think it's more normal to use the proper method for adding an element:
a = numpy.append(a, a[0])
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Map over object preserving keys
...erscore provides a function _.mapObject to map the values and preserve the keys.
_.mapObject({ one: 1, two: 2, three: 3 }, function (v) { return v * 3; });
// => { one: 3, two: 6, three: 9 }
DEMO
With Lodash
Lodash provides a function _.mapValues to map the values and preserve the keys.
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Iterating over dictionaries using 'for' loops
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key is just a variable name.
for key in d:
will simply loop over the keys in the dictionary, rather than the keys and values. To loop over both key and value you can use the following:
For Python 3.x:
for key, value i...
Move an array element from one array position to another
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If you'd like a version on npm, array-move is the closest to this answer, although it's not the same implementation. See its usage section for more details. The previous version of this answer (that modified Array.prototype.move) can be...
Visual Studio keyboard shortcut to display IntelliSense
What's the keyboard shortcut for Visual Studio 2005 and Visual Studio 2008 to display the IntelliSense box if one accidentally hits ESC and wants the box come back again?
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What is the difference between DSA and RSA?
...ppears they are both encryption algorithms that require public and private keys. Why would I pick one versus the other to provide encryption in my client server application?
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Python's json module, converts int dictionary keys to strings
... is run, python's json module (included since 2.6) converts int dictionary keys to strings.
9 Answers
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