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string

<type name="string" category="libraryfunc" is="library">
	<summary>The string *type* is a sequence of characters.

The string *library* is a standard Lua library which provides functions for the manipulation of strings.[[1]](https://www.lua.org/pil/20.html)

In Garry's Mod there are several extra useful functions and features added to this library.<br/>
Most notably all strings will access this library through the string metatable index function.[[2]](https://github.com/Facepunch/garrysmod/blob/master/garrysmod/lua/includes/extensions/string.lua#L311-L322)

This means all strings are treated like table objects and the string library as its <page text="Meta Table">Meta_Tables</page>

```lua
local x = "Kittens"
function string.Foobar(self) return self:Right(4) end

string.Right(x,4) == x:Right(4) == x:Foobar() == ("Kittens"):Right(4) == x[-4]..x[-3]..x[-2]..x[-1]
```


The string *metatable* however is something else, and to access that you must use `getmetatable("")`.

The difference here is related to <page>Metamethods</page>, such as using (+) instead of (..) to concatenate strings.
<warning>Using `+` operator for concatenation breaks lua metamethod to sum string as numbers (Example: `"10" + "1"` return `11` (number)) and this is 400 times SLOWER!</warning>

```lua
local stringmeta = getmetatable("")
function stringmeta.__add(str,x) return str..x end -- This will work
function string.__add(str,x) return str..x end -- But this will not.

print("Kittens" + " And " + "Puppies")
```

See <page>Meta Tables</page> and <page>Metamethods</page> for more information.
<warning>Making changes to the string *metatable* is not a good idea unless you know what you are doing. Use the string *library* instead.</warning>

This category lists functions available in the string *library*.</summary>
</type>

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matproxy
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mesh
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util
vgui
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widgets
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Hooks 10

Game Events 40

Panels 130

ContentHeader
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DCheckBox
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DCollapsibleCategory
DColorButton
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DFrame
DGrid
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DHorizontalDivider
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DHorizontalScroller
DHScrollBar
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DHTML
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DImage
DImageButton
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DLabel
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DLabelURL
DListBox
DListBoxItem
DListView
DListView_Column
DListView_Line
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DMenu
DMenuBar
DMenuOption
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DMenuOptionCVar
DModelPanel
- LayoutEntity
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- RunAnimation
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DModelSelect
- SetHeight
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DModelSelectMulti
- AddModelList
DNotify
- AddItem
- GetAlignment
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- GetLife
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- Shuffle
DNumberScratch
- OnValueChanged
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- GetActive
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- GetFloatValue
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- GetMax
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- GetRange
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- IsEditing
- LockCursor
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- SetActive
- SetDecimals
- SetFloatValue
- SetFraction
- SetMax
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- SetShouldDrawScreen
- SetValue
- SetZoom
- UpdateConVar
DNumberWang
- OnValueChanged
- GetDecimals
- GetFloatValue
- GetFraction
- GetInterval
- GetMax
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- GetTextArea
- GetValue
- HideWang
- SetDecimals
- SetFloatValue
- SetFraction
- SetInterval
- SetMax
- SetMin
- SetMinMax
- SetValue
DNumSlider
- OnValueChanged
- GetDecimals
- GetDefaultValue
- GetMax
- GetMin
- GetRange
- GetTextArea
- GetValue
- IsEditing
- ResetToDefaultValue
- SetConVar
- SetDark
- SetDecimals
- SetDefaultValue
- SetMax
- SetMin
- SetMinMax
- SetValue
- TranslateSliderValues
- UpdateNotches
- ValueChanged
DPanel
DPanelList
- AddItem
- CleanList
- Clear
- EnableVerticalScrollbar
- GetItems
- GetPadding
- GetSpacing
- InsertAtTop
- Rebuild
- SetAutoSize
- SetPadding
- SetSpacing
DPanelOverlay
DPanelSelect
DPanPanel
DProgress
- GetFraction
- SetFraction
DProperties
DProperty_Combo
DProperty_Float
- GetDecimals
DProperty_Generic
- GetRow
- SetRow
- Setup
- ValueChanged
DProperty_VectorColor
- Setup
- SetValue
DPropertySheet
DRGBPicker
- OnChange
- GetPosColor
- GetRGB
- SetRGB
DScrollPanel
DShape
DSizeToContents
- GetSizeX
- GetSizeY
- SetSizeX
- SetSizeY
DSlider
DSprite
- GetColor
- GetHandle
- GetMaterial
- GetRotation
- SetColor
- SetHandle
- SetMaterial
- SetRotation
DTab
DTextEntry
DTileLayout
- OnModified
- ClearTiles
- ConsumeTiles
- Copy
- CopyContents
- FindFreeTile
- FitsInTile
- GetBaseSize
- GetBorder
- GetMinHeight
- GetSpaceX
- GetSpaceY
- GetTile
- Layout
- LayoutTiles
- SetBaseSize
- SetBorder
- SetMinHeight
- SetSpaceX
- SetSpaceY
- SetTile
DTooltip
DTree
DTree_Node
DVerticalDivider
- DoConstraints
- GetBottom
- GetBottomMin
- GetDividerHeight
- GetDragging
- GetHoldPos
- GetMiddle
- GetTop
- GetTopHeight
- GetTopMax
- GetTopMin
- SetBottom
- SetBottomMin
- SetDividerHeight
- SetDragging
- SetHoldPos
- SetMiddle
- SetTop
- SetTopHeight
- SetTopMax
- SetTopMin
- StartGrab
DVScrollBar
- AddScroll
- AnimateTo
- BarScale
- GetHideButtons
- GetOffset
- GetScroll
- Grip
- SetHideButtons
- SetScroll
- SetUp
HTML
IconEditor
ImageCheckBox
- GetChecked
- Set
- SetChecked
- SetMaterial
Material
- SetAlpha
- SetMaterial
MatSelect
PropSelect
SpawnIcon
SpawnmenuContentPanel
TextEntry
- OnKeyCodeTyped
- OnTextChanged
UGCPublishWindow
AchievementIcon
AvatarImage
Awesomium
Button
CheckButton
ContentSidebarToolbox
CtrlListBox
DCategoryHeader
DListLayout
DListView_ColumnPlain
DListView_DraggerBar
DListViewHeaderLabel
DListViewLabel
DListViewLine
DNumPad
DProperty_Boolean
DProperty_Entity
DProperty_Int
DScrollBarGrip
DTree_Node_Button
EditablePanel
fingerposer
FingerVar
Frame
Label
ModelImage
PanelList
PresetEditor
RadioButton
RichText
SlideBar
Slider
TGAImage
URLLabel

Enumerations 100

Structures 72

Shaders 18

Miscellaneous Reference 30

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