this looks like a implementation to test the https://en.wikipedia.org/wiki/Collatz_conjecture if a number is even, its divided by 2, if its odd, its multiplied by 3 and 1 is added. the conjecture aussumes it will lead to 1 for each positive integer, but there is no proof yet solved I need help understanding what the following … Read more
The error is self-explanatory. You are not passing in the correct parameters that decode() is expecting. Look at the actual declaration of the decode() overload that you are trying to call (there are 3 overloads available): unsigned decode(std::vector<unsigned char>& out, unsigned& w, unsigned& h, const std::string& filename, LodePNGColorType colortype = LCT_RGBA, unsigned bitdepth = 8); … Read more
About the first part of the question: You return Task or Task if your method does a I/O call, or a long running CPU intensive calculation and you don’t want the caller thread to be blocked while this operation is being performed. You return void or a direct value in your method doesn’t fit the … Read more
You can create a function to do this task as below: String GetAddress(String searchName) { var strLines=File.ReadLines(“filepath.csv”); foreach(var line in strLines) { if(line.Split(‘,’)[1].Equals(searchName)) return line.Split(‘,’)[2]; } return “”; } you can call the above function as below: String peterAddress=GetAddress(“Peter”); EDIT: String address=””; Dictionary<String, String> dict_Name_Address = new Dictionary<string, string>(); var lines=File.ReadLines(“FileName.csv”); foreach (var line in … Read more
static int a; This declares the static variable. That tells the compiler that this field exists and would be of type int. This is useful information for compiling the code. But the variable still needs to be defined. That is some translation unit(and exactly one translation unit) needs to allocate the memory for this variable. … Read more
A simple solution is by trying all possible substrings from left to right (i.e. starting from indices i=0 to n-k), and comparing each to the next substrings (i.e. starting from indices j=i+1 to n-k). For every i-substring, you count the number of occurrences, and keep a trace of the most frequentso far. As a string … Read more
You are facing problem on this line (result => result.SiteUrl.Contains(last.ToString()); Can you please check that SiteUrl is type of string otherwise it not going to work for you. because last is type of string and Contains is method supported by string type … or otherwise last need to be enumebrable collection and siteurl also enumerable … Read more
Keep references to your objects with a list: var myobjects = new List<System.Security.Cryptography.MD5>(); for (var i = 0; i < 100; i++) { myobjects.Add(System.Security.Cryptography.MD5.Create()); } and iterate through the list: for (var i = 0; i < 100; i++) { myobjects[i].ComputeHash(new byte[] { (byte)i }); Console.WriteLine(BitConverter.ToString( myobjects[i].Hash)); } Otherwise Reusing the same variable will make … Read more
The problem is that you are mixing up options of the library with HTTP headers. Try with this instead: public static void Main (string[] args) { string url = “https://dashboard.reviewpush.com/api/company/locations”; using (var client = new WebClient()) { client.Headers[HttpRequestHeader.ContentType] = “application/json”; client.Headers[“X-Api-Key”] = “key”; client.Headers[“X-Api-Secret”] = “secret”; string s = client.DownloadString(url); Console.WriteLine(s); } } You might … Read more
cout <<“Done!” <<fac1 ” multiplied by ” <<fac2 ” equals ” <<prod <<endl; Should be cout <<“Done!” <<fac1 << ” multiplied by ” <<fac2 <<” equals ” <<prod <<endl; And cout <<“Done!” <<divid ” divided by ” <<divis ” equals ” <<quot ” with a remainder of ” <<rem <<endl; Should be cout <<“Done!” <<divid … Read more
You are missing the closing curly brace (}) at the end of this loop. foreach (string s in tokens) { if (double.TryParse(s, out oneNum)) { nums.Add(oneNum); } else { Console.WriteLine(“You have inputed invalid number, please try again!”); break; } Without that closing brace, all the following calculations are considered to be inside that loop! Since … Read more
If your image column allows for null values, change to if(pb1 != null) { MemoryStream stream = new MemoryStream(); pb1.Image.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg); byte[] pic = stream.ToArray(); command.Parameters.AddWithValue(“@image”, pic); } else { command.Parameters.AddWithValue(“@image”, System.Data.SqlTypes.SqlBinary.Null); // edit: replaced incorreect DBNull.Value due to comment by Heinzi } System.Data.SqlTypes.SqlBinary.Null Currently you are not providing enough parameters to your Sql if … Read more
What you are trying to do with generics is impossible if the type you need is not T. The value that goes where you are asking for needs to be a generic value or a value known at compile time. That means your only choice is: create<T>(root); Or: create<PureTypeName>(root); Or adding other generic parameters. solved … Read more
You could use RegularExpressions for extracting in an easy way each token of your input string. In the following example, support for extra spaces is included also (the \s* in the regular expressions). Remember that always is a great idea to give a class the responsibility of parsing (in this example) rather than taking an … Read more
What does no match for ‘operator>>’ (operand types are ‘std::istream’ {aka ‘std::basic_istream’} and ‘float*’) mean? [closed] solved What does no match for ‘operator>>’ (operand types are ‘std::istream’ {aka ‘std::basic_istream‘} and ‘float*’) mean? [closed]