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Is there a NumPy function to return the first index of something in an array?
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You can also convert a NumPy array to list in the air and get its index. For example,
l = [1,2,3,4,5] # Python list
a = numpy.array(l) # NumPy array
i = a.tolist().index(2) # i will return index of 2
print i
It will print 1.
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Split List into Sublists with LINQ
... Dividing by three has the effect of grouping them into groups of 3. Then convert each group to a list and the IEnumerable of List to a List of Lists
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How do I URL encode a string
...dCharacters:NSCharacterSet.URLQueryAllowedCharacterSet];
To specifically convert '&', you'll need to remove it from the url query set or use a different set, as '&' is allowed in a URL query:
NSMutableCharacterSet *chars = NSCharacterSet.URLQueryAllowedCharacterSet.mutableCopy;
[chars rem...
What is a stack trace, and how can I use it to debug my application errors?
...t: [com.example.myproject.MyEntity]
at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:96)
at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:66)
at org.hibernate.id.insert.AbstractSelectingDelegate.performInsert(AbstractSelectingDele...
Passing a single item as IEnumerable
...nsion method to SingleItemAsEnumerable, everything started to work. Cannot convert IEnumerable<Dictionary<CheckBox,System.Tuple<int,int>>.KeyCollection>' to 'IEnumerable<CheckBox>'. An explicit conversion exists (are you missing a cast?) I can live with a hack for a while, b...
What is an IndexOutOfRangeException / ArgumentOutOfRangeException and how do I fix it?
...ay) { }
void test() {
// This will throw InvalidCastException, cannot convert Int32[] to Int32[*]
foo((int)Array.CreateInstance(typeof(int), new int[] { 1 }, new int[] { 1 }));
}
Validate Parameters
If index comes from a parameter you should always validate them (throwing appropriate Argu...
Finding the type of an object in C++
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Doesn't dynamic_cast throw if its not convertible? Is there a way to do it without generating a throw?
– jww
Aug 31 '16 at 11:38
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How to easily map c++ enums to strings
...s in some library header files that I'm using, and I want to have a way of converting enum values to user strings - and vice-versa.
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Max or Default?
...e "Select CType(y.MyCounter, Integer?)". I have to do an original check to convert Nothing to 0 for my purposes, but I like getting the results without an exception.
– gfrizzle
Dec 5 '08 at 13:51
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How to Iterate over a Set/HashSet without an Iterator?
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Converting your set into an array
may also help you for iterating over the elements:
Object[] array = set.toArray();
for(int i=0; i<array.length; i++)
Object o = array[i];
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