I would like to say this article going to help most of the developers who are in need to remove duplicates which are present in Original array by comparing with the other array elements. If you could not understand what I am saying, look at the below example you will get an idea on how we can play with JavaScript built-in functions.

Actual Task:

My actual task is, I have two arrays one naming Array1 and other naming Array2. In Array1 I have elements like “a”,”b”,”c”,”d”,”e”,”f” and in Array2 I have elements like “c”,”e” only. Now, I want to remove elements “c” and “e” from Array1 (by comparing Array2), hope you have understood now whats going to be the output yeah! the output should be Output: “a”,”b”,”d”,”f”. This can be achieved using concat and slice functions. Want, to know how we can achieve this, see below for respective code snippets:

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<script language="javascript">
var Array1 = new Array("a","b","c","d","e","f");
var Array2 = new Array("c","e");
 
for (var i = 0; i<Array2.length; i++) {
	var arrlen = Array1.length;
	for (var j = 0; j<arrlen; j++) {
		if (Array2[i] == Array1[j]) {
			Array1 = Array1.slice(0, j).concat(Array1.slice(j+1, arrlen));
		}//if close
	}//for close
}//for close
alert(Array1);
</script>

Hope this might help some of the developers who are looking for the same logic. Please, let me know if you have any suggestions in making it more compatible enough by reducing lines of code.

Creating a New File in Ruby Language
You can create new files in Ruby using the “new” method that belongs to “file”class. The “new” method can handle two arguments, the first argument is the file name of the new file that you want to create. The second argument indicates how you want to open the file, like whether you want to access it only for reading or just writing or both and so on.

Following are some of the file modes used in Ruby:
r - Read only access.
r+ – Read and write access.
w – Write only access.
w+ – Read and write access
a – Write only access
a+ – Read and write access
b – Binary file mode

Example: to create a new file in “write” mode:

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File.new("temp.txt", "w")

To Open Existing Files in Ruby
Existing files can be opened using “open” method belonging to the class “File”.

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file = File.open("temp.txt")

You can open files already created in any of the modes mentioned above.
Example: to open a file in read-only mode:

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file = File.open("temp.txt", "r")

You can also check whether a file is already open or not using the method “closed?”.

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file.closed?

Output: Returns True or False, if the file is already open then it returns “True” else “False”.
To close a file, you can use “close” method belonging to class “file”.

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file = File.open("temp.txt", "r")
file.close

How to rename and delete files in Ruby programming language?
To rename or delete files you can use “rename” and “delete” methods respectively.
Example: Creating new file

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File.new("tempfile.txt", "w")

Example: Renaming an existing file

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File.rename("tempfile.txt", "newfile.txt")

Example: Deleting an existing file:

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File.delete("newfile.txt")

How to get information on Files?
To do more than just creating and opening files you need to use other methods in class “file”.
You can find whether a file exits using “exists?” method:

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File.exists?("temp.txt")

You can check whether a file is really a file or is it some directory, using “file?” method:

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File.file?("ruby")

To check whether it is a directory, use the “directory?” method:

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File.directory?("ruby")

To check whether a file is readable, use “readable?” method:

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File.readable?("temp.txt")

To check whether a file is writable, use “writable ?” method:

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File.writable?("temp.txt")

To check whether a file is executable, use “executable?” method:

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File.executable?("temp.txt")

You can get the file size using the “size” method:

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File.size("temp.txt")

To check whether file is empty, use “zero?” method:

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File.zero?("temp.txt")

Find out the file type using “ftype” method:

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File.ftype("readme.txt")

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File.ftype("../ruby")

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File.ftype("/dev/sda5")

The above are only basics of handling files in Ruby programming language. There is more in programing than just handling files. You need a lot of interest and hard work to master these. So, all the best to your journey into Ruby programming!

Articles which you would like to read:
1. Remove duplicates from an array using JavaScript
2. Check out the number of Occurrences using JavaScript
3. Adding a div, button to the body tag dynamically using JavaScript DOM
4. Open e-mail message window onclick of a button using JavaScript
5. Free JavaScript database for your browser, Taffy DB
6. JavaScript Visitors Browser Detection Code Snippet
7. Netscape is the ‘navigator.appName’ for Google Chrome
8. Error: Invalid source HTML for this operation
9. System Error: -1072896658 in IE
10. Simple steps to develop AJAX Website – DeveloperSnippets

There is a professional way of learning any programming language. Every programming language has some common elements to learn. If we can learn the common things in a sequential manner then we can learn any other language with out others help.

Below are the common Elements of any programming language.

• History of the Language
• Introduction
  • Purpose
  • Features
  • Advantages
  • Limitations

• Variables, Keywords
• Input / Output statements
• Syntax to use, Basic programs
• Conditional Statements like if-else, while, for etc.
• Arrays to store Data
• Functions ( pre-defined & User defined)
• Any File operations ( Input / Output)

• If it is an Object-Oriented language then you need to include some common concepts like Class, Object, Inheritance, Polymorphism, Abstraction etc.

In this way you can learn any programming language easier.

Compare these with any language. It suits for almost all languages.

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2. Programmer should be able to Debug the code efficiently

• The Most fun part in programming is Debugging.
• Debugging is fun, because it begins with a mystery. You think it should do something, but instead it does something else. It is not always quite so simple—Debugging requires creativity and ingenuity.
• If there is a single key to debugging is to use the Divide and Conquer technique on the mystery.
• Suppose, for example, you created a program that should do ten things in a sequence. When you run it, it crashes. Since you didn’t program it to crash, you now have a mystery. When you look at the output, you see that the first seven things in the sequence were run successfully. The last three are not visible from the output, so now your mystery is smaller: ‘It crashed on thing #8, #9, or #10.’

• Through sufficient hands-on experience on programming will automatically increases the debugging capabilities. Important steps to follow for better programming.

1) Clear Documentation is must

2) Follow Software Engineering principles for the Programming

3) Should have some knowledge on testing the programs with required methods such as Black Box testing, White Box testing, Unit Testing, Integrated Testing, Performance testing etc.

4) Use own experiences to debug the code such as checking code with alert messages, divide and conquer method etc

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3. Should always try to Keep updating yourself. (Self Motivated)

Software Strategy is to Live Today, we should be learning tomorrow’s Advanced Technologies, otherwise we will be lost some where.

• So keeping that in our mind, we should keep us updating with new technologies and softwares by all means. Like
• 1) Checking the upgrades, new versions.
• 2) Latest Technology trends
• 3) Customer Focus
• 4) Browsing Technology sites, blogs, participating in discussions etc.
• Follow the above specified flow to learn any programming language
• Follow Good Programming techniques, Best Practices like Documentation, Good Logic etc.
• Learn how to debug the program, Implement traditional techniques like Divide and Conquer and other testing techniques.
• Keep yourself update with Latest Technology Trends.

Developers!! Please let me know your thoughts on this…… I will be waiting for your valuable comments on this…… Do you guys agree with this……