I hope I’ve understood your question right. If you want to subtract each value from x[<indexes_for_x>] then you can do: x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] indexes_for_x = [0, 1, 2, 3] for v in indexes_for_x: print(f”y_at_index_{v} = {[w – x[v] for w in x]}”) Prints: y_at_index_0 = [0, … Read more
In R, a vector (a in your question) can be subset with a logical index vector (b in your question). If the corresponding members are TRUE in the logical vector, the elements (of a) are retained. a = c (3, 4, 7, 8) b = c(TRUE, TRUE, FALSE, FALSE) a[b] #[1] 3 4 a[b] will … Read more
Create two sections One for HomeArr and one for AutoArr. I believe for each section you wanna show a additional cell with some title. So below code should help you. extension ViewController : UITableViewDataSource { func numberOfSections(in tableView: UITableView) -> Int { return 2 } func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { … Read more
Perhaps the closest thing in Python to this Javascript array behavior is a dictionary. It’s a hashed mapping. defaultdict is a dictionary that implements a default value. In [1]: from collections import defaultdict In [2]: arr = defaultdict(bool) Insert a couple of True elements: In [3]: arr[10] = True In [4]: arr Out[4]: defaultdict(bool, {10: … Read more
Here is a simple function to do what you want: def get_length_or_value(l, *i): item = l for index in i: item = item[index] return len(item) if isinstance(item, list) else item This function first finds the element at the given indices (if any), and then returns the appropriate value based off wether the element is a … Read more
use list comprehension in python l = [3, 11, 4, 9, 1, 23, 5, 11] indexes = [index for index in range(len(l)) if l[index] == 11] output: [1, 7] use numpy for finding the matching indices. import numpy as np l = [3, 11, 4, 9, 1, 23, 5, 11] np_array = np.array(l) item_index = … Read more
I you are a beginner, then start with simple an basic concepts… Use this template that is the structure of a HTML page: <html> <head> <title>Page Title</title> <!–Link to an external resource–> <link rel=”stylesheet” type=”text/css” href=”https://stackoverflow.com/questions/28797082/css-folder/css-file.css”> </head> <body> <header class=”top-section” role=”banner”></header> </body> </html> Put your style sheets into another file. For example: css-folder/css-file.css: html { … Read more
Based on what you’re saying, I think you’re trying to get some data like this: input = [“hello world”, “foo bar”, “red cat”] data_wanted = { “foo” : 1, “hello” : 0, “cat” : 2, “world” : 0, “red” : 2 “bar” : 1 } So what you should be doing is adding the words … Read more
Take a look at htaccess and mod_rewrite. You asked for no links, so I’ll let you Google them yourself. Once you have a chosen path, try it out and if you can’t get it working come back with examples of what you’ve tried and in what way they didn’t work. 3 solved How to make … Read more
Sorry but that day I didn’t know about slicing, sorry to bother, here it is: l=[1,2,3,4,5,6,7,8,9];l=[[l[i],l[i+1],l[i+2]] for i in range(0,9,3)];print(L) solved How to print a list as list of list in particular order in Python?
In pseudo-code : int n; // Length of subsampled array for i: new_array[i] = array[(int)(log(i)/log(n)*length(array))] Is that what you are trying to do ? 1 solved C programming: logarithmic index array [closed]
For DataFrames, the value to be passed for axis is columns. frame.sort_index(axis=”columns”) 1 solved No axis named 1 for object type
you can find a typical solution here ` #include<stdio.h> void swap(int *a, int *b); void segregateEvenOdd(int arr[], int size) { /* Initialize left and right indexes */ int left = 0, right = size-1; while (left < right) { /* Increment left index while we see 0 at left */ while (arr[left]%2 == 0 && … Read more
This line: i = word.find(letter) always finds the first occurrence of letter in word, and this line: start = indeces.index(i) always finds the first occurrence of i in indeces. Then, this line: index=word.find(letter,start) includes start, so just finds the same letter straight away! The only way to make your current code work would be to … Read more