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Merge pull request #3296 from EpicWolverine/VBNetCheatSheet
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New VB.NET Cheat Sheet
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@mintsoft
mintsoft committed Jun 25, 2016
2 parents 469463e + 112e02b commit 1658b78
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{
"id": "vb_net_cheat_sheet",
"name": "VB.NET",
"description": "Common syntax in the Visual Basic .NET programming language.",

"aliases": [
"vbnet", "vb.net", "vb", "visual basic", "visual basic .net", "visual basic net", "visual basic dot net"
],

"template_type": "terminal",

"section_order": [
"General Structure",
"Common Functions and Keywords",
"Control Structures",
"Comparison Operators",
"Boolean Operators",
"Arithmetic Operators",
"Basic Data Types"
],

"sections": {
"General Structure": [
{
"key": "Option Explicit",
"val": "Enforces strong typing"
},
{
"key": "Option Strict",
"val": "Restricts implicit data type conversions to only widening conversions"
},
{
"key": "Imports System.IO",
"val": "Import another namespace"
},
{
"key": "Public Class Name\n\t'methods\nEnd Class",
"val": "Classes contain methods and events"
},
{
"key": "Public Sub ShowMessage(ByVal message As String)\n\tMsgBox(message)\nEnd Sub",
"val": "A subroutine is a block of code that does not return a value back"
},
{
"key": "Public Function Add(ByVal num1 As Integer, ByVal num2 As Integer) As Integer\n\tReturn num1 + num2\nEnd Function",
"val": "A function is a block of code that does returns a value back"
},
{
"key": "Dim message As String",
"val": "Declare a variable named \"message\" of type \"String\""
},
{
"key": "Dim NumArray() As Integer = New Integer(3) \\{1, 2, 3\\}",
"val": "Declare an Integer array named \"NumArray\" that's holding 3 values: 1, 2, and 3"
},
{
"key": "message = \"Hello \" & vbCrLf & \"world!\"",
"val": "String concatenation, where \"vbCrLf\" inserts a new line"
},
{
"key": "'this is a comment",
"val": "Single-line comment. Multi-line comments require a single quote on each line"
}
],
"Common Functions and Keywords": [
{
"key": "Console.WriteLine(\"Hi DuckDuckGo!\")",
"val": "Write to the output window"
},
{
"key": "MsgBox(\"Hi DuckDuckGo!\")",
"val": "Open an alert box"
},
{
"key": "My.",
"val": "The My namespace offers easier access to some functions such as file I/O and form control"
},
{
"key": "Me",
"val": "Refers to the current instance of a class or structure"
}
],
"Control Structures": [
{
"key": "If expression1 Then\n\t'do thing A\nEnd If",
"val": "Do thing A if expression1 is True"
},
{
"key": "ElseIf expression2 Then\n\t'do thing B",
"val": "Do thing B if expression2 is True"
},
{
"key": "Else\n\t'do thing C",
"val": "Do thing C if all other conditions are false"
},
{
"key": "For index = 1 To 10 Step 2\n\t'expressions\nNext",
"val": "Create Integer index, set index to 1, and loop through until index is 10, incrementing by 2 each time"
},
{
"key": "For Each x In y\n\t'expressions\nNext",
"val": "Loop through collection y, setting x to the current item of each iteration"
},
{
"key": "While expression\n\t'expressions\nEnd While",
"val": "Loop the code block while the expression is true"
},
{
"key": "Try\n\t'expressions\nCatch ex As Exception\n\tConsole.WriteLine(ex.Message)\nEnd Try",
"val": "Catch possible errors"
}
,
{
"key": "Continue \\[ Do | For | While \\]",
"val": "Skip the rest of the current iteration and go to the next iteration of the specified loop"
}
,
{
"key": "Exit \\[ Do | For | Function | Property | Select | Sub | Try | While \\]",
"val": "Skip the rest of the specified code block"
}
],
"Comparison Operators": [
{
"key": "=",
"val": "Either the assignment operator or the conditional operator depending on context"
},
{
"key": "<",
"val": "Less than"
},
{
"key": ">",
"val": "Greater than"
},
{
"key": "<=",
"val": "Less than or equal to"
},
{
"key": ">=",
"val": "Greater than or equal to"
},
{
"key": "<>",
"val": "Not equal to"
}
],
"Boolean Operators": [
{
"key": "And",
"val": "Boolean AND"
},
{
"key": "AndAlso",
"val": "Boolean AND, but the second condition is not evaluated if the first is false"
},
{
"key": "Or",
"val": "Boolean OR"
},
{
"key": "OrElse",
"val": "Boolean OR, but the second condition is not evaluated if the first is true"
},
{
"key": "Xor",
"val": "Boolean exclusive OR"
},
{
"key": "Not",
"val": "Boolean NOT"
},
{
"key": "If(condition, is_True, is_False)",
"val": "Conditional operator or inline if"
},
{
"key": "If(nullable_type, is_Nothing)",
"val": "Null-coalescing operator"
}
],
"Arithmetic Operators": [
{
"key": "a + b",
"val": "Adds a and b"
},
{
"key": "a - b",
"val": "Subtracts b from a"
},
{
"key": "a * b",
"val": "Multiplies a and b"
},
{
"key": "a / b",
"val": "Divides a by b and returns the full decimal quotient"
},
{
"key": "a \\ b",
"val": "Divides a by b and returns the integer quotient"
},
{
"key": "a Mod b",
"val": "Divides a by b and returns remainder"
},
{
"key": "a ^ b",
"val": "Returns a raised to the power of b"
}
],
"Basic Data Types": [
{
"key": "Boolean",
"val": "2 bytes - True or False"
},
{
"key": "Byte",
"val": "1 byte - 0 to 255 (unsigned)"
},
{
"key": "Char",
"val": "2 bytes - 0 to 65,535 (unsigned)"
},
{
"key": "Date",
"val": "8 bytes - Jan 1, 0001 to Dec 31, 9999"
},
{
"key": "Decimal",
"val": "16 bytes - approx +/-7.9228 x 10^28"
},
{
"key": "Double",
"val": "8 bytes - double-precision floating-point"
},
{
"key": "Integer",
"val": "4 bytes - +/-2,147,483,647"
},
{
"key": "Long",
"val": "8 bytes - +/- 9.2 x 10^18"
},
{
"key": "Object",
"val": "4 bytes - any type of variable"
},
{
"key": "SByte",
"val": "1 byte - -128 to 127"
},
{
"key": "Short",
"val": "2 bytes - +/-32,767"
},
{
"key": "Single",
"val": "4 bytes - single-precision floating-point"
},
{
"key": "String",
"val": "2 byte sequence - 0 to approx 2 billion Unicode characters"
},
{
"key": "Structure (user-defined type)",
"val": "sum of the sizes of its members - holds data in a cumtom defined format"
},
{
"key": "UInteger",
"val": "4 bytes - 0 to 4,294,967,295"
},
{
"key": "ULong",
"val": "8 byte - 0 to 1.84 x 10^19"
},
{
"key": "UShort",
"val": "2 bytes - 0 to 65,535"
}
]
}
}

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