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JavaScript array toSource() method returns a string representing the source code of the array. This method is supported by Mozilla.ExampleYou can try to run the following code to learn how to represent the source code of an object with JavaScript Arrays − JavaScript Array toSource Method var arr = new Array("football", "baseball", "volleyball", "cricket"); var str = arr.toSource(); document.write("Returned string is : " + str );
Use the reduce() method in JavaScript to apply a function simultaneously against two values of the array from left-to-right as to reduce it to a single value.The following are the parameters −callback − Function to execute on each value in the array.initialValue − Object to use as the first argument to the first call of the callback.ExampleYou can try to run the following code to learn how to work with reduce() method in JavaScript − JavaScript Array reduce Method if (!Array.prototype.reduce) { ... Read More
Use ReadAllLines() method to read all the lines one by one in a file.Let’s say we have a file “new.txt” with the following lines.One Two ThreeFirstly, set the path of the file to be read.String myPath = "new.txt";Now add it under a string array to fetch the lines on by one.String[] fLine = File.ReadAllLines(myPath);Let’s say you need to fetch the first line. For that.fLine[0]The following is the complete example that reads lines one by one in a file.Exampleusing System; using System.IO; public class Demo { public static void Main() { String myPath = "new.txt"; ... Read More
Get only a single element of a sequence using the Single() method.Let’s say we have a string array with only one element.string[] str = { "one" };Now, get the element.str.AsQueryable().Single();Here is our code.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { string[] str = { "one" }; string res = str.AsQueryable().Single(); Console.WriteLine(res); } }Outputone
To match any string containing one or more p’s with JavaScript RegExp, use the p+ Quantifier.ExampleYou can try to run the following code to match any string containing one or more p’s. Here p is considered as a number of occurrences − JavaScript Regular Expression var myStr = "Secure and Responsive!"; var reg = /s+/g; var match = myStr.match(reg); document.write(match);
The Single() method returns the only element that satisfies a condition. If more than one such element is visible, then an error is thrown.The following is our string array.string[] str = { "jack", "tom", "henry", "time"};Now, use the Single() method to get each element. Then, we have used Lambda Expression to calculate an element whose length is greater than four.str.AsQueryable().Single(name => name.Length > 4);Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { string[] str = { "jack", "tom", "henry", "time"}; // finding string whose length is ... Read More
The method returns a single specific element of a sequence. If the element is not present in the sequence, then the default value is returned.We have two string arrays here.string[] str1 = { "one" }; string[] str2 = { };First array is checked for a single element, whereas the second array is empty and checked using SingleorDefault.str2.AsQueryable().SingleOrDefault();The following is an example showing the usage of SingleorDefault() method.Example Live Demousing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { string[] str1 = { "one" }; string[] str2 = { }; ... Read More
To match any string containing zero or one p’s with JavaScript RegExp, use the p? Quantifier.ExampleYou can try to run the following code to match any string containing zero or one p. Here p is considered a number of occurrences − JavaScript Regular Expression var myStr = "Welcome 1, 100, 10000, 10000"; var reg = /10?/g; var match = myStr.match(reg); document.write(match);
Skip elements and return the remaining elements using the Skip() method.The following is an array.int[] marks = { 80, 55, 79, 99 };Now, let us skip 2 elements using Lambda Expressions, but this is done after arranging the elements in descending order.IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).Skip(2);Exampleusing System; using System.Linq; using System.Collections.Generic; public class Demo { public static void Main() { int[] marks = { 80, 55, 79, 99 }; IEnumerable selMarks = marks.AsQueryable().OrderByDescending(s => s).Skip(2); Console.WriteLine("Skipped the result of 1st two students..."); foreach (int res in selMarks) { console.WriteLine(res); } } }
Let’s say we want to remove whitespace from the following string str1.string str1 = "Brad Pitt";Now, use Regex Replace to replace whitespace with empty. Here, we have used System.Text.RegularExpressions.string str2 = System.Text.RegularExpressions.Regex.Replace(str1, @"\s+", "");Let us see the complete example.Example Live Demousing System; using System.Text.RegularExpressions; namespace Demo { class Program { static void Main(string[] args) { string str1 = "Brad Pitt"; Console.WriteLine(str1); string str2 = System.Text.RegularExpressions.Regex.Replace(str1, @"\s+", ""); Console.WriteLine(str2); } } }OutputBrad Pitt BradPitt