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Python hashable dicts
...are invalid, unless I also store the current version of the grammar along with the cached parse results. ( EDIT : a consequence of this use of key-value collections is that they should be immutable, but I don't intend to expose the interface to allow them to be changed, so either mutable or immutab...
How to find keys of a hash?
... : 3};
alert(Object.keys(obj)); // will output ["a", "b", "c"]
Compatibility details can be found here.
On the Mozilla site there is also a snippet for backward compatibility:
if(!Object.keys) Object.keys = function(o){
if (o !== Object(o))
throw new TypeError('Object.keys called on no...
Global variables in Java
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edited May 26 '14 at 15:49
golddove
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Why do Python's math.ceil() and math.floor() operations return floats instead of integers?
...what should floor(1.0e30) return?
Now, while Python's integers are now arbitrary precision, it wasn't always this way. The standard library functions are thin wrappers around the equivalent C library functions.
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How do I check that a number is float or integer?
... n && n % 1 !== 0;
}
Update 2019
5 years after this answer was written, a solution was standardized in ECMA Script 2015. That solution is covered in this answer.
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improve this answe...
What's the difference between backtracking and depth first search?
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Backtracking is a more general purpose algorithm.
Depth-First search is a specific form of backtracking related to searching tree structures. From Wikipedia:
One starts at the root (selecting some node as the root in the graph case) and explores as far as possibl...
Why do C++ libraries and frameworks never use smart pointers?
...used. Instead they should always be wrapped inside smart pointers, whether it's scoped or shared pointers.
8 Answers
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Is there a method that calculates a factorial in Java?
I didn't find it, yet. Did I miss something?
I know a factorial method is a common example program for beginners. But wouldn't it be useful to have a standard implementation for this one to reuse?
I could use such a method with standard types (Eg. int, long...) and with BigInteger / BigDecimal, too...
How to delete a module in Android Studio
Is there a way to delete a module within Android Studio?
When I right click on a module I can't find an option for deletion, is it elsewhere?
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Android: Remove all the previous activities from the back stack
When i am clicking on Logout button in my Profile Activity i want to take user to Login page, where he needs to use new credentials.
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