How do I break out a loop? var largest=0 for(i<-999 to 1 by -1) { for (j<-i to 1 by -1) { val product=i*j if (largest>product) // I want to break out here else if(product.toString.equals(product.toString.reverse)) largest=largest max product } } How do I turn nested for loops into tail recursion? From Scala Talk at FOSDEM … Read more
Like many people these days I have been trying the different features that C++11 brings. One of my favorites is the “range-based for loops”. I understand that: for(Type& v : a) { … } Is equivalent to: for(auto iv = begin(a); iv != end(a); ++iv) { Type& v = *iv; … } And that begin() … Read more
Is there a way in Java’s for-each loop for(String s : stringArray) { doSomethingWith(s); } to find out how often the loop has already been processed? Aside from using the old and well-known for(int i=0; i < boundary; i++) – loop, is the construct int i = 0; for(String s : stringArray) { doSomethingWith(s); i++; … Read more
This for loop iterates over all elements in a list: for item in my_list: print item Is there a way to know within the loop how many times I’ve been looping so far? For instance, I want to take a list and after I’ve processed ten elements I want to do something with them. The … Read more
Is there a difference in ++i and i++ in a for loop? Is it simply a syntax thing? 23 Answers 23
I’m having some strange problem with my JS program. I had this working properly but for some reason it’s no longer working. I just want to find the value of the radio button (which one is selected) and return it to a variable. For some reason it keeps returning undefined. Here is my code: function … Read more
I have the following for loop in my django template displaying days. I wonder, whether it’s possible to iterate a number (in the below case i) in a loop. Or do I have to store it in the database and then query it in form of days.day_number? {% for days in days_list %} <h2># Day … Read more
I know how to use both for loops and if statements on separate lines, such as: >>> a = [2,3,4,5,6,7,8,9,0] … xyz = [0,12,4,6,242,7,9] … for x in xyz: … if x in a: … print(x) 0,4,6,7,9 And I know I can use a list comprehension to combine these when the statements are simple, such … Read more
Is it possible to use the break function to exit several nested for loops? If so, how would you go about doing this? Can you also control how many loops the break exits? 21 Answers 21
I want to perform my own complex operations on financial data in dataframes in a sequential manner. For example I am using the following MSFT CSV file taken from Yahoo Finance: Date,Open,High,Low,Close,Volume,Adj Close 2011-10-19,27.37,27.47,27.01,27.13,42880000,27.13 2011-10-18,26.94,27.40,26.80,27.31,52487900,27.31 2011-10-17,27.11,27.42,26.85,26.98,39433400,26.98 2011-10-14,27.31,27.50,27.02,27.27,50947700,27.27 …. I then do the following: #!/usr/bin/env python from pandas import * df = read_csv(‘table.csv’) for i, row … Read more
