Dictionary Builder Part 1 Getting Started

Step 1 – build the Form Controls: grpInput btnOpenDictionary lstWords btnExtractWords txtNewWord btnAddWord btnOpenDictionary lstWords btnSave btnExit + and assorted labels

Which control will provide the easiest place to start? Step 2 – start easy Which control will provide the easiest place to start?

Which control will provide the easiest place to start? btnAddWord. Step 2 – start easy Which control will provide the easiest place to start? btnAddWord.

Step 2 – btnAddWord What does it do?

Step 2 – btnAddWord What does it do? It moves a word from the textBox to the listBox.

Step 2 – btnAddWord What does it do? How? It moves a word from the textBox to the listBox. How?

Step 2 – btnAddWord What does it do? How? It moves a word from the textBox to the listBox. How? if there's something in the textBox

Step 2 – btnAddWord What does it do? How? It moves a word from the textBox to the listBox. How? if there's something in the textBox copy it to the listBox

Step 2 – btnAddWord What does it do? How? What else should be done? It moves a word from the textBox to the listBox. How? if there's something in the textBox copy it to the listBox What else should be done?

Step 2 – btnAddWord What does it do? How? It moves a word from the textBox to the listBox. How? if there's something in the textBox copy it to the listBox set the focus back in the textBox

Step 2 – btnAddWord What does it do? How? It moves a word from the textBox to the listBox. How? if there's something in the textBox copy it to the listBox set the focus back in the textBox clear the textBox

BUT not everything should go into the listBox

BUT not everything should go into the listBox What conditions should be imposed on the text strings entered by the User?

BUT not everything should go into the listBox We need to deal with “words” that: have UPPER case characters

BUT not everything should go into the listBox We need to deal with “words” that: have UPPER case characters are too long

BUT not everything should go into the listBox We need to deal with “words” that: have UPPER case characters are too long have non-alpha characters

BUT not everything should go into the listBox We need to deal with “words” that: have UPPER case characters are too long have non-alpha characters duplicate a word in the list

BUT not everything should go into the listBox We need to deal with “words” that: have UPPER case characters are too long have non-alpha characters duplicate a word in the list These tasks will be facilitated by using an identifier instead of object.property notation, and sub-programs.

Step 2 – btnAddWord Revisiting our pseudo code… if there's something in the textBox copy it to the listBox set the focus back in the textBox clear the textBox

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then End If

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then Dim newWord = LCase(txtWord.Text) lstWords.Items.Add(newWord) End If

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then Dim newWord = LCase(txtWord.Text) lstWords.Items.Add(newWord) txtWord.Focus() End If

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then Dim newWord = LCase(txtWord.Text) lstWords.Items.Add(newWord) txtWord.Focus() txtWord.Clear() End If

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then Dim newWord = LCase(txtWord.Text) If Len(newWord) <= 11 Then lstWords.Items.Add(newWord) txtWord.Focus() txtWord.Clear() End If

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then Dim newWord = LCase(txtWord.Text) If Len(newWord) <= 11 Then lstWords.Items.Add(newWord) txtWord.Focus() txtWord.Clear() Else txtWord.SelectAll() End If

Step 2 – btnAddWord If txtWord.Text <> vbNullString Then Dim newWord = LCase(txtWord.Text) If Len(newWord) <= 11 And isWord(newWord) Then lstWords.Items.Add(newWord) txtWord.Focus() txtWord.Clear() Else txtWord.SelectAll() End If

Step 2.1 – isWord() Private Function isWord() End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String) As Boolean End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String) As Boolean Return ??? End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String) As Boolean Return flag End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String As Boolean Dim flag = True Return flag End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String) As Boolean Dim flag = True Dim c As Integer For c = 1 To Len(t) ˈ under some condition flag = False Next Return flag End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String) As Boolean Dim flag = True Dim c As Integer For c = 1 To Len(t) Dim thisC = Mid(t, c, 1) If thisC < "a" Or thisC > "z" Then flag = False End If Next Return flag End Function

Step 2.1 – isWord() Private Function isWord(ByVal t As String) As Boolean Dim flag = True Dim c As Integer For c = 1 To Len(t) Dim thisC = Mid(t, c, 1) If thisC < "a" Or thisC > "z" Then flag = False Exit For End If Next Return flag End Function

Step 2.2 - isUnique() End Function Private Function isUnique(ByVal t As String) As Boolean End Function

Step 2.2 - isUnique() Dim flag = True Return flag End Function Private Function isUnique(ByVal t As String) As Boolean Dim flag = True Return flag End Function

Step 2.2 - isUnique() Dim flag = True Dim i As Integer Private Function isUnique(ByVal t As String) As Boolean Dim flag = True Dim i As Integer For i = 0 To lstWords.Items.Count - 1 ˈ under some condition flag = False Next Return flag End Function

Step 2.2 - isUnique() Dim flag = True Dim i As Integer Private Function isUnique(ByVal t As String) As Boolean Dim flag = True Dim i As Integer For i = 0 To lstWords.Items.Count - 1 If t = lstWords.Items.Item(i) Then flag = False Exit For End If Next Return flag End Function