array-intersect

PHP array_intersect() - how does it handle different types?

If I've got an array of values that are basically zerofilled string representations of various numbers and another array of integers, will array_intersect() still match elements of different types? For example, would this work: $arrayOne = array('0003', '0004', '0005'); $arrayTwo = array(4, 5, 6); $intersect = array_intersect($arrayOn...

in Python find number of same elements in 2 lists

Hi, In Python if I have 2 lists say: l1 = ['a', 'b', 'c', 'd'] l2 = ['c', 'd', 'e'] is there a way to find out how many elements they have the same. In the case about it would be 2 (c and d) I know I could just do a nested loop but is there not a built in function like in php with the array_intersect function Thanks ...

rails - Finding intersections between multiple arrays

Hi, I am trying to find the intersection values between multiple arrays. for example code1 = [1,2,3] code2 = [2,3,4] code3 = [0,2,6] So the result would be 2 I know in PHP you can do this with array_intersect I wanted to be able to easily add additional array so I don't really want to use multiple loops Any ideas ? Thanks, Alex...

Array intersection function speed

I've written a short function for array intersection and wanted to know why one function is faster than the other. 1) Dim list2() As String 'Assume it has values' Dim list2length As Integer = list2.length Function newintersect(ByRef list1() As String) As String() Dim intersection As New ArrayList If (list1.Length < list2length...

compare two arrays of numbers and remove duplicates in php

Hi, OK i have two groups of mobile numbers (from mysql) which i need to process, the problem is i need to remove duplicate numbers from the results. Someone told me about "array_intersect" but I am not very good at these things and I don't see any good examples on the PHP website. Any help or suggestions is appreciated thanks :) ...

PHP intersect vs MySQL intersect

I have a column of data in a table (1) which I have to check against the column of data in several hundred (or thousand) other tables. Would it be faster to do this as a mysql query intersecting both tables, or to get the data from table (1) into an array, and then set the other columns of data as arrays and intersect? It's MySQL and P...