JavaScript Reference

JavaScript Reference



These notes will be a reference for JavaScript methods and functions.



************************ STRINGS ************************

Create a string:
          var str = new String("yo");
          var str = "yo";


Properties:

.length
          gives the length of a string



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Static String Methods:


String.fromCharCode(num1, ..., numN)
          Examples:     String.fromCharCode(45);
                        String.fromCharCode(65,66,67);    // returns "ABC"

          Takes Unicode integer values and returns a string corresponding to their character values.











.lastIndexOf()

.match()

.replace()

.search()

.slice()

.split()

.substr()

.substring()

.toLowerCase()

.toUpperCase()

.toString()

.trim()

.valueOf()



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Instance String methods:


.charAt(index)
          Examples:   "hey man".charAt(4);    // returns "m"
                      str.charAt(0);          // returns first element of str variable

          Takes an index integer and returns the character value at that index in the string.

.charCodeAt(index)
          Examples:   "hey man".charCodeAt(4);    // returns 109 (the unicode of "m")
                      "A dragon".charCodeAt(0);   // returns 65 (the unicode of "A")

          Takes an index integer and returns the unicode integer value of the character at that index.

.concat(str1, ..., strN)
          Examples:   "hi".concat(" there, whats ", "up?");   // returns "hi there, whats up?"

          Concatenates two or more strings together, the first string being the string that concat() is called on.

.indexOf(strSearchValue[, fromIndex])
          Examples:   "yo guy".indexOf()






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