Introduction This question is a duplicate of a previously asked question. The question is about a NullPointerException that is thrown when a string is passed. This type of exception is thrown when a program attempts to use an object reference that has not been initialized. In this case, the string that is being passed is … Read more
Use return here, Change this if (substr($randomString, 0, 1) != 2) { // if doesn’t start with 2 generateRandomString($length, $alpha, $numeric); // try again } to if (substr($randomString, 0, 1) != 2) { // if doesn’t start with 2 return generateRandomString($length, $alpha, $numeric); // try again } 1 solved Recursive function doesn’t return [duplicate]
Introduction When working with HTML forms, radio buttons are a great way to allow users to select one option from a list of choices. However, when it comes to retrieving the data from the radio buttons using PHP, it can be a bit tricky. In this article, we will discuss how to get the radio … Read more
From help(Trig): Angles are in radians, not degrees, for the standard versions (i.e., a right angle is π/2), and in ‘half-rotations’ for cospi etc. > cos(pi) [1] -1 > cos(2*pi) [1] 1 Mind that: > pi [1] 3.141593 solved cos/sin/tan function gives different result than my calculator [closed]
In your object initialisation code, you have the following: self.Grade = self.GetGrade() self.LenGrade = self.GetLenGrade() This means “set the value of the data member Grade to the value obtained by calling the method GetGrade” and the same for LenGrade. It should not be surprising that they’re called, it would be more surprising if they were … Read more
Alternative approach to achieve this by using reduce() function as: >>> operation_str=”3^2^4^1^0″ >>> reduce(lambda x, y: int(y)**int(x), operation_str.split(‘^’)[::-1]) 43046721 Explanation based on step by step operation: >>> operation_str.split(‘^’) [‘3’, ‘2’, ‘4’, ‘1’, ‘0’] # Converted str into list >>> operation_str.split(‘^’)[::-1] [‘0’, ‘1’, ‘4’, ‘2’, ‘3’] # Reversed list >>> reduce(lambda x, y: int(y)**int(x), operation_str.split(‘^’)[::-1]) 43046721 … Read more
Imagine you wrote such function: public static int square(int x) { pow(x, 2); return x; } It will compute the square of x. But then computed square will not affect anything and the function will return just x. Now look carefully at your code if (i == 5){ return i; } else { something(i + … Read more
From your tags, I’m guessing you’re using printf(). Simply leave out the “\n” character, which means “newline.”. In other words. printf(“> “); printf(“text\n”); This will print: > text 1 solved How do you type something on the same line of text in C [closed]
Here’s a pseudo-code for you count = 1 begin for : if(condition) increment count by 1 // do something… if (increment > 5) // do something… break //or return else // do something… break //or return end of for EDIT: Use break in your else block. The break statement breaks out of the closest loop. … Read more
Well: Hope the following helps you. Unlike for and while loops, which test the loop condition at the top of the loop, the do…while loop in C programming language checks its condition at the bottom of the loop A do…while loop is similar to a while loop, except that a do…while loop is guaranteed to … Read more
Introduction This question is about understanding the output of a particular code snippet. The code in question is a simple one-liner that outputs the number 1. It is important to understand why this code outputs 1 in order to understand the fundamentals of programming. In this article, we will discuss the reasons why this code … Read more
Right above this exercise in The C Programming Language it says: The standard headers <limits.h> and <float.h> contain symbolic constants for all of these sizes, along with other properties of the machine and compiler. These are discussed in Appendix B. So, see Appendix B (page 257 in the second edition I have). =) 6 solved … Read more
This isn’t directly supported unfortunately, but there is still a better way than modifying the FC source (that get’s messy with patches and stuff). There are several render hooks available that we can use to fix the formatting after the fact. viewRender doesn’t work because it’s called before the title changes. So we can use … Read more
Introduction Python 3 is a powerful programming language that allows developers to create complex applications. One of the most important concepts in Python 3 is the concept of a value, which is a floating point number. A floating point number is a number that has a decimal point and can represent a wide range of … Read more
Don’t use Regex to parse html. A correct way would be using an html parser like HmlAgilityPack var doc = new HtmlAgilityPack.HtmlDocument(); doc.LoadHtml(htmlstring); var links = doc.DocumentNode.SelectNodes(“//a”) .Select(a => a.Attributes[“href”].Value) .ToList(); solved Regular Expression to find out tag and get the value of HREF using C# [duplicate]