What Does IndexOf Return If Not Found C#?

What does indexOf do in Java?

The indexOf() method returns the position of the first occurrence of specified character(s) in a string.

Tip: Use the lastIndexOf method to return the position of the last occurrence of specified character(s) in a string..

What is the return type of indexOf?

The indexOf() method returns the position of the first occurrence of a specified value in a string. This method returns -1 if the value to search for never occurs. Note: The indexOf() method is case sensitive. Tip: Also look at the lastIndexOf() method.

Can you index a string in C#?

The position of a character in a string is usually referred to as the character’s index. … Note that because the indices start at 0, not 1, the index of the last character is one less that the length of the string.

Are movie indexes safe?

Index sites are public ftp servers where you are downloading directly from their servers which has static public IP to access. Since its private or public ftp servers, you can ask the admin just to remove the content due to copyright or any other legal issues.. But not the whole site.

Is indexOf case sensitive?

The indexOf() method returns the index number where the target string is first found or -1 if the target is not found. Like equals(), the indexOf() method is case-sensitive, so uppercase and lowercase chars are considered to be different.

How do I convert a string to an int?

parseInt() to convert a string to an integer.Use Integer. parseInt() to Convert a String to an Integer. This method returns the string as a primitive type int. … Use Integer. valueOf() to Convert a String to an Integer. This method returns the string as an integer object.Nov 23, 2020

Why is indexOf returning?

The reason it returns -1 instead of “false” is that a needle at the beginning of the string would be at position 0, which is equivalent to false in Javascript. So returning -1 ensures that you know there is not actually a match.

Does indexOf work with objects?

indexOf() method returns the index of the first matching item in an array (or -1 if it doesn’t exist). … But… that doesn’t work if the array contains objects instead of simple strings or numbers.

What is the use of Ord () function?

In other words, given string of length 1, the ord() function returns an integer representing the Unicode code point of the character when the argument is a Unicode object, or the value of the byte when the argument is an 8-bit string. For example, ord(‘a’) returns the integer 97, ord(‘€’) (Euro sign) returns 8364.

What is indexOf C#?

In C#, IndexOf() method is a string method. This method is used to find the zero based index of the first occurrence of a specified character or string within current instance of the string. The method returns -1 if the character or string is not found.

What is the index of an empty string?

indexOf is returning a 0 (instead of -1) when asking for the index of an empty string within a string. The Javadocs only say this method returns the index in this string of the specified string, -1 if the string isn’t found.

What is the difference between findIndex and indexOf?

findIndex – Returns the index of the first element in the array where predicate is true, and -1 otherwise. indexOf – Returns the index of the first occurrence of a value in an array.

How do you find the index of an object?

| Get index of object by its property….It specifies a function to be run for each element in the array.currentValue: This parameter is required.It specifies the value of the current element.index: This parameter is optional. It specifies the array index of the current element.arr: This parameter is optional.Jun 12, 2019

What value does indexOf function return if it gets a no match?

-1The indexOf method will always return -1 if there was no match.

What does indexOf return if not found?

indexOf() The indexOf() method returns the index within the calling String object of the first occurrence of the specified value, starting the search at fromIndex . Returns -1 if the value is not found.

How do I find a word in a string C#?

The LastIndexOf method finds the zero-based index of the last occurrence of a specified Unicode character or string.; it returns -1 if the character or string is not found. using System; var text = “There is an old hawk in the sky. The sun is shining.”; var word = “is”; int first = text. IndexOf(word); int last = text.

How do I find a character in a string in C#?

To find the first or last occurrence of a character within the string: Using a string variable type int index = str. IndexOf(@”\”); where index is a variable that will store the zero-based position of the character within the string, str is the variable you want to search, and @”\” is the string you are searching for.

What does indexOf return if not found JavaScript?

JavaScript Array indexOf() Method Returns -1 if the item is not found. If the item is present more than once, the indexOf method returns the position of the first occurence.

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