How to check if a string is in an array

I am trying to check whether a string is in an array and if continues even though the fileInfo.Name.Contains a string that is in files.Any:

\\FILES LIKE DATABASE.MDB IS IN C:PROJECTS\HOLON\DATABASE.MDB
                        **if (files.Any((fileInfo.Name.Contains)))** 
\\DO SOMETHING
                        Console.WriteLine(
                         fileInfo.Name, fileInfo.Length, 

If you alread have the filenames collected in an array, then you should either do it this way:

if (files.Any() && files.Contains(fileInfo.Name))
{
   // Do something
}

If you just want to check if a file exists then you can use File.Exists:

if(System.IO.File.Exists(fileInfo.Name))
{
    // Do Something
}

Java - Check if Array contains a certain value?, Java examples to check if an Array (String or Primitive type) contains a certain values, updated with Java 8 stream APIs. You can find string in an array using two methods. (I know there are plenty of methods, but two methods are most common) Method 1 You can loop each item of an array and compare each item of the array with the items that are to find.

So you have a collection of full file paths? And you want to check if one or more of those list entries match with a specific file name?

Perhaps this would work for you:

string fileToSearch = "DATABASE.MDB";
bool found = files.Any(fileName => new FileInfo(fileName).Name.ToUpper() == fileToSearch.ToUpper());

Edit:

An alternative to constructing new FileInfo objects would be to use System.IO.Path:

bool found = files.Any(fileName => Path.GetFileName(fileName).ToUpper() == fileToSearch.ToUpper());

Edit 2:

On the other hand, if you want to search for a specific file name, and you want to use the result, you could do something like this:

var fileToSearch = "DATABASE.MDB";

var fileInfo =
    (from f in files
     let fi = new FileInfo(f)
     where fi.Name.ToUpper() == fileToSearch.ToUpper()
     select fi).FirstOrDefault();

if (fileInfo != null)
{
    if (fileInfo.Exists)
    {
        Console.WriteLine($"{fileInfo.Name} ({fileInfo.Length} bytes).");
    }
    else
    {
        Console.WriteLine($"{fileInfo.Name} (does not exist).");
    }
}

I used a LINQ query here for readability. You could use the extension methods (files.Select(f => new FileInfo(f)).Where(fi => fi.Name.ToUpper() == fileToSearch.ToUpper()).FirstOrDefault()) as well, but that's up to you.

How do I determine whether an array contains a particular value in , String[] values = {"AB","BC","CD","AE"}; boolean contains = Arrays. stream(values). anyMatch("s"::equals); To check whether an array of int , double or long contains a value use IntStream , DoubleStream or LongStream respectively. 1.2 Example to check if a String Array contains multiple values : StringArrayExample2.java. package com.mkyong.core; import java.util.Arrays; import java.util.List; public class StringArrayExample2 { public static void main(String[] args) { String[] alphabet = new String[]{"A", "C"}; // Convert String Array to List List<String> list = Arrays.asList(alphabet); // A or B if (list.contains("A") || list.contains("B")) { System.out.println("Hello A or B"); } // A and B if (list.containsAll(Arrays.

if (Array.Exists(files, element => element.Contains(fileInfo.Name)))

How to Check if an Array Contains a Value in Java Efficiently?, Four Different Ways to Check If an Array Contains a Value. 1) Using List : public static boolean useList(String[] arr, String targetValue) { return Arrays. Item is in the array" End If End Sub Function IsInArray (stringToBeFound As String, arr As Variant) As Boolean IsInArray = UBound (Filter (arr, stringToBeFound)) > -1 End Function The above routine correctly gives the message "Yes! The item is in the array"

Check if a Java Array Contains a Value, String[] seedArray(int length) {. String[] strings = new String[length];. Random value = new Random();. for (int i = 0; i < length; i++) {. strings[i]� When you run the program, the output will be: Four is found. In the above program, we've used a non-primitive data type String and used Arrays 's stream () method to first convert it to a stream and anyMatch () to check if array contains the given value toFind.

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Comments
  • @PrashantPimpale no, you can use files.Any() also to check if there is any data in the array, because this method returns bool.
  • Yup got it! I thought it was related to fileName exists or file exists related!