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Integrating the ZXing library directly into my Android application
...l. But can u also provide the code, where the reverse can be done. I mean, convert the QR code back to the String?
– Shaon Hasan
May 15 '14 at 15:31
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Hashset vs Treeset
...of elements
It is generally faster to add elements to the HashSet and then convert the collection to a TreeSet for a duplicate-free sorted traversal.
None of these implementations are synchronized. That is if multiple threads access a set concurrently, and at least one of the threads modifies the se...
How to round a number to significant figures in Python
...of significant figures. It will sometimes use 'e' scientific notation, so convert the rounded string back to a float then through %s string formatting.
>>> '%s' % float('%.1g' % 1234)
'1000'
>>> '%s' % float('%.1g' % 0.12)
'0.1'
>>> '%s' % float('%.1g' % 0.012)
'0.01'
&g...
How to model type-safe enum types?
...nother class that is basically a wrapper around a string and can be freely converted in both directions (as is the case for Symbol). I guess that's what you meant when saying "It won't give you any type safety", it just wasn't very clear given that OP explicitly asked for type safe solutions. I wasn...
What is the best way to get the count/length/size of an iterator?
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Using Guava library, another option is to convert the Iterable to a List.
List list = Lists.newArrayList(some_iterator);
int count = list.size();
Use this if you need also to access the elements of the iterator after getting its size. By using Iterators.size() you...
Calculating distance between two points, using latitude longitude?
...n2(Math.sqrt(a), Math.sqrt(1 - a));
double distance = R * c * 1000; // convert to meters
double height = el1 - el2;
distance = Math.pow(distance, 2) + Math.pow(height, 2);
return Math.sqrt(distance);
}
sh...
ToList()— does it create a new list?
...ion operations. Extension methods like ToList() and ToArray() allow you to convert the computed sequence into a standard collection.
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How to get the name of enumeration value in Swift?
...you can now print type names and enum cases by default using print(_:), or convert to String using String's init(_:) initializer or string interpolation syntax. So for your example:
enum City: Int {
case Melbourne = 1, Chelyabinsk, Bursa
}
let city = City.Melbourne
print(city)
// prints "Melbo...
How to concatenate items in a list to a single string?
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A more generic way to convert python lists to strings would be:
>>> my_lst = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> my_lst_str = ''.join(map(str, my_lst))
>>> print(my_lst_str)
'12345678910'
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Can someone give an example of cosine similarity, in a very simple, graphical way?
... are 8-dimensional. A virtue of using cosine similarity is clearly
that it converts a question that is beyond human ability to visualise to one
that can be. In this case you can think of this as the angle of about 35
degrees which is some 'distance' from zero or perfect agreement.
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