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- Dictionaryinitiate
verb
- 1. cause (a process or action) to begin: "he proposes to initiate discussions on planning procedures" Similar Opposite
- 2. admit (someone) into a secret or obscure society or group, typically with a ritual: "she had been formally initiated into the movement" Similar Opposite
noun
- 1. a person who has been initiated into an organization or activity: "an initiate of the cult"
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If you simply want to create an empty data frame and fill it with some incoming data frames later, try this: newDF = pd.DataFrame() #creates a new dataframe that's empty. newDF = newDF.append(oldDF, ignore_index = True) # ignoring index is optional. # try printing some data from newDF.
Jul 29, 2009 · Declare and define an array. int intArray[] = new int[3]; This will create an array of length 3. As it holds a primitive type, int, all values are set to 0 by default. For example, intArray[2]; // Will return 0 Using box brackets [] before the variable name. int[] intArray = new int[3]; intArray[0] = 1; // Array content is now {1, 0, 0}
Feb 19, 2015 · It would work identical to. original = getattr(c1, 'the_list') new_value = original + [ 42 ] setattr(c1, 'the_list', new_value) And do a completely different thing: first of all the original + [ 42 ] would create a new list object. Then the attribute the_list would be created in c1, and set to point to this new list.
One thing to note: all elements in the list will have initially the same id (or memory address). When you change any element later on in the code, this will impact only the specified value, - HOWEVER - if you create a list of custom objects in this way (using the int multiplier) and later on you change any property of the custom object, this will change ALL the objects in the list.
The normal way would be this (for a local variable): Map<String,String> test = new HashMap<String, String>(); test.put("test","test"); test.put("test1","test2"); If your test map is an instance variable, put the initialization in a constructor or instance initializer:
I'm beginning python and I'm trying to use a two-dimensional list, that I initially fill up with the same variable in every place. I came up with this: def initialize_twodlist(foo): twod_list ...
Jun 17, 2009 · Actually, probably the "best" way to initialize the ArrayList is the method you wrote, as it does not need to create a new List in any way:
Oct 3, 2009 · @AndersonGreen As I said there's no such thing as a variable declaration in Python. You would create a multidimensional list by taking an empty list and putting other lists inside it or, if the dimensions of the list are known at write-time, you could just write it as a literal like this: my_2x2_list = [[a, b], [c, d]].
In certain other languages (AS3 for example), it has been noted that initializing a new array is faster if done like this var foo = [] rather than var foo = new Array() for reasons of object creati...
For your first array example use, a = numpy.arange(5) To initialize big_array, use. big_array = numpy.zeros((10,4)) This assumes you want to initialize with zeros, which is pretty typical, but there are many other ways to initialize an array in numpy.
