How to use strings as array indexes using JavaScript?

Q

✍: Guest

A

Javascript does not have a true hashtable object, but through its wierdness, you can use the array as a hashtable.

<script type="text/javascript">
var days = ["Sunday","Monday","Tuesday","Wednesday",
   "Thursday","Friday","Saturday"];

   for(var i=0; i < days.length; i++) {
      days[days[i]] = days[i];
   }
   
document.write("days[\"Monday\"]:"+days["Monday"]);
</script>

This produces
days["Monday"]:Monday

2011-07-19, 3750👍, 0💬

How to create an object using JavaScript?
How to create an object using JavaScript? Objects can be created in many ways. One way is to create the object and add the fields directly. <script type="text/javascript"> var myMovie = new Object(); myMovie.title = "Aliens"; myMovie.director = "James Cameron"; document.write("movie: title is... 2011-08-02, 4056👍, 0💬

How to make a array as a stack using JavaScript?
How to make a array as a stack using JavaScript? The pop() and push() functions turn a harmless array into a stack: <script type="text/javascript"> var numbers = ["one", "two", "three", "four"]; numbers.push("five"); numbers.push("six"); document.write(numbers.pop()); document.write(numbers.p... 2011-07-26, 3904👍, 0💬

How tp create Arrays using JavaScript??
How tp create Arrays using JavaScript?? <script type="text/javascript"> var days = new Array(); days[0] = "Sunday" days[1] = "Monday" days[2] = "Tuesday" days[3] = "Wednesday" days[4] = "Thursday" days[5] = "Friday" days[6] = "Saturday" document.write("first day is "+days[0]) </script>... 2011-07-12, 3892👍, 0💬

How to shift and unshift using JavaScript?
How to shift and unshift using JavaScript? <script type="text/javascript"> var numbers = ["one", "two", "three", "four"]; numbers.unshift("zero"); document.write(" "+numbers.shift()); document.write(" "+numbers.shift()); document.write(" "+numbers.shift()); </script> This produces zero... 2011-08-02, 3854👍, 0💬

How to delete an entry using JavaScript?
How to delete an entry using JavaScript? The "delete" operator removes an array element, but oddly does not change the size of the array. <script type="text/javascript"> var days = ["Sunday","Monday","Tuesday"," Wednesday","Thursday","Friday","Saturday" ];document.write("Number of days:"+days... 2011-07-19, 3843👍, 0💬

What does the delete operator do?
What does the delete operator do? The delete operator is used to delete all the variables and objects used in the program ,but it does not delete variables declared with var keyword. 2011-07-12, 3841👍, 0💬

How to use strings as array indexes using JavaScript?
How to use strings as array indexes using JavaScript? Javascript does not have a true hashtable object, but through its wierdness, you can use the array as a hashtable. <script type="text/javascript"> var days = ["Sunday","Monday","Tuesday"," Wednesday","Thursday","Friday","Saturday" ];for(va... 2011-07-19, 3751👍, 0💬

How to use "join()" to create a string from an array using JavaScript?
How to use "join()" to create a string from an array using JavaScript? "join" concatenates the array elements with a specified seperator between them. <script type="text/javascript"> var days = ["Sunday","Monday","Tuesday"," Wednesday","Thursday","Friday","Saturday" ];document.write("days:"+d... 2011-07-26, 3749👍, 0💬

What's the Date object using JavaScript?
What's the Date object using JavaScript? Time inside a date object is stored as milliseconds since Jan 1, 1970. new Date(06,01,02) // produces "Fri Feb 02 1906 00:00:00 GMT-0600 (Central Standard Time)" new Date(06,01,02).toLocaleString( )// produces "Friday, February 02, 1906 00:00:00" new Date(06,... 2011-07-05, 3702👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.