The definition of asarray is: def asarray(a, dtype=None, order=None): return array(a, dtype, copy=False, order=order) So it is like array, except it has fewer options, and copy=False. array has copy=True by default. The main difference is that array (by default) will make a copy of the object, while asarray will not unless necessary.
You can do it like this: using System.IO; static void Main(string[] args) { using(var reader = new StreamReader(@”C:\test.csv”)) { List<string> listA = new List<string>(); List<string> listB = new List<string>(); while (!reader.EndOfStream) { var line = reader.ReadLine(); var values = line.Split(‘;’); listA.Add(values[0]); listB.Add(values[1]); } } }
You can use Object.keys() and map() to do this var obj = {“1″:5,”2″:7,”3″:0,”4″:0,”5″:0,”6″:0,”7″:0,”8″:0,”9″:0,”10″:0,”11″:0,”12”:0} var result = Object.keys(obj).map((key) => [Number(key), obj[key]]); console.log(result);
The + operator is not defined for arrays. What happens is that Javascript converts arrays into strings and concatenates those. Update Since this question and consequently my answer is getting a lot of attention I felt it would be useful and relevant to have an overview about how the + operator behaves in general … Read more
That is the wrong mental model for using NumPy efficiently. NumPy arrays are stored in contiguous blocks of memory. To append rows or columns to an existing array, the entire array needs to be copied to a new block of memory, creating gaps for the new elements to be stored. This is very inefficient if … Read more
What you have should work. If, however, the spaces provided are defaulting to… something else? You can use the whitespace regex: str = “Hello I’m your String”; String[] splited = str.split(“\\s+”); This will cause any number of consecutive spaces to split your string into tokens.
Numpy matrices are strictly 2-dimensional, while numpy arrays (ndarrays) are N-dimensional. Matrix objects are a subclass of ndarray, so they inherit all the attributes and methods of ndarrays. The main advantage of numpy matrices is that they provide a convenient notation for matrix multiplication: if a and b are matrices, then a*b is their matrix … Read more
No, it is blocking. Have a look at the specification of the algorithm. However a maybe easier to understand implementation is given on MDN: if (!Array.prototype.forEach) { Array.prototype.forEach = function(fun /*, thisp */) { “use strict”; if (this === void 0 || this === null) throw new TypeError(); var t = Object(this); var len = … Read more
[*] (Background: I have some experience implementing C and C++ compilers.) Variable-length arrays in C99 were basically a misstep. In order to support VLAs, C99 had to make the following concessions to common sense: sizeof x is no longer always a compile-time constant; the compiler must sometimes generate code to evaluate a sizeof-expression at runtime. … Read more
If the array contains strings, you can use the String‘s join method: var array = [“1”, “2”, “3”] let stringRepresentation = “-“.join(array) // “1-2-3” In Swift 2: var array = [“1”, “2”, “3”] let stringRepresentation = array.joinWithSeparator(“-“) // “1-2-3” This can be useful if you want to use a specific separator (hypen, blank, comma, etc). … Read more