dcsimg
Login | Register   
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX

By submitting your information, you agree that devx.com may send you DevX offers via email, phone and text message, as well as email offers about other products and services that DevX believes may be of interest to you. DevX will process your information in accordance with the Quinstreet Privacy Policy.


Tip of the Day
Language: VB7
Expertise: Intermediate
Sep 21, 2002

WEBINAR:

On-Demand

Application Security Testing: An Integral Part of DevOps


GetWordOccurrences - Number of occurrences of each word in a string

' Returns a Hashtable whose keys are the unique words in a source string
' and whose elements are the number of occurrences of each word
'
' Example:
'  
' Dim de As DictionaryEntry
' For Each de In GetWordOccurrences(sourceText)
'    Console.WriteLine("'{0}' = {1} time(s), de.Key, de.Value)
' Next
'
' Requires the following Imports
'   Imports System.Collections.Specialized

Function GetWordOccurrences(ByVal source As String) As Hashtable
    ' this holds the result - we need case insensitivity
    Dim res As Hashtable = CollectionsUtil.CreateCaseInsensitiveHashtable()

    ' find the first match
    Dim m As System.Text.RegularExpressions.Match
    m = System.Text.RegularExpressions.Regex.Match(source, "\w+")

    ' loop while a word is found
    Do While m.Success
        If res(m.Value) Is Nothing Then
            ' the word isn't there yet
            res.Add(m.Value, 1)
        Else
            ' increment the number of occurrences found so far
            res(m.Value) = CInt(res(m.Value)) + 1
        End If
        ' skip to next word
        m = m.NextMatch()
    Loop

    ' return the Hashtable
    Return res
End Function

Francesco Balena
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date