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<< Back to: FAQ: Lisp Frequently Asked Questions 1/7 [Monthly posting]

Question by ananda
Submitted on 6/18/2004
Related FAQ: FAQ: Lisp Frequently Asked Questions 1/7 [Monthly posting]
Rating: Rate this question: Vote
What is hash table?
how it can be represented?
where it is used?


Answer by raki
Submitted on 1/10/2007
Rating: Not yet rated Rate this answer: Vote
i don't know the answer

 

Answer by Venkatesh
Submitted on 3/9/2007
Rating: Not yet rated Rate this answer: Vote
a hash table, or a hash map, is a data structure that associates keys with values. The primary operation it supports efficiently is a lookup: given a key (e.g. a person's name), find the corresponding value (e.g. that person's telephone number). It works by transforming the key using a hash function into a hash, a number that is used to index into an array to locate the desired location ("bucket") where the values should be.

Given is the following sample of Creation of hastables Just I am using to write by .NET
We can use either languages.

<script runat="server">
sub Page_Load
if Not Page.IsPostBack then
  dim mycountries=New Hashtable
  mycountries.Add("N","Norway")
  mycountries.Add("S","Sweden")
  mycountries.Add("F","France")
  mycountries.Add("I","Italy")
  rb.DataSource=mycountries  rb.DataValueField="Key"  rb.DataTextField="Value"  rb.DataBind()
end if
end sub
</script><html>
<body><form runat="server">
<asp:RadioButtonList id="rb" runat="server"
AutoPostBack="True" /></form></body>
</html>


 

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