Programming Fundamentals/Strings/Pseudocode
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strings.txt
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[edit | edit source]Declare String Name Declare Integer Index Declare String Last Declare String First === Find === <pre> // Returns the 0-based index of Substring in Text, or -1 if not found. Declare Integer Index Declare Boolean Done Set Index = 0 Set Done = false Do If Index + len(Substring) <= len(Text) Then If Substring(Text, Index, len(Substring)) == Substring Then Set Done = true Else Set Index = Index + 1 End If Else Set Index = -1 Set Done = true End If While Not Done Return Index
Lower
[edit | edit source]// Returns Text converted to lower case. Declare Integer Index Declare Integer Code For Index = 0 To len(Text) - 1 Set Code = toCode(substring(Text, Index, 1)) If Code >= 65 AND Code <= 90 Then Set Code = Code + 32 Set Text = Substring(Text, 0, Index) + toChar(Code) + Substring(Text, Index + 1, len(Text) - Index - 1) End If End For Return Text
Substring
[edit | edit source]// Returns the substring of Text beginning at Start up to the given Length. Declare String Result Declare Integer Index Set Result = "" Set Index = Start While Index < len(Text) AND Length > 0 Set Result = Result + substring(Text, Index, 1) Set Index = Index + 1 Set Length = Length - 1 End While Return Result
Trim
[edit | edit source]// Returns Text with leading and trailing spaces removed. Declare Boolean Done Set Done = false Do If len(Text) > 0 Then If substring(Text, 0, 1) == " " Then Set Text = Substring(Text, 1, len(Text) - 1) Else Set Done = true End If Else Set Done = true End If While Not Done Set Done = false Do If len(Text) > 0 Then If substring(Text, len(Text) - 1, 1) == " " Then Set Text = Substring(Text, 0, len(Text) - 1) Else Set Done = true End If Else Set Done = true End If While Not Done Return Text
Upper
[edit | edit source]// Returns Text converted to upper case. Declare Integer Index Declare Integer Code For Index = 0 To len(Text) - 1 Set Code = toCode(substring(Text, Index, 1)) If Code >= 97 AND Code <= 122 Then Set Code = Code - 32 Set Text = Substring(Text, 0, Index) + toChar(Code) + Substring(Text, Index + 1, len(Text) - Index - 1) End If End For Return Text