backend

Documentation

Index

• func NewColumnarBackend(headers Headers) *columnarBackend
• type ApplyFunction
• type Backend
  • func New(headers Headers) Backend
• type Cell
• type Column
• type ColumnVisitor
• type Columns
  • func (c *Columns) GetHeaders() Headers
• type Header
• type Headers
• type MutateFunction
• type Ordering
• type Row
• type RowVisitor

Functions

func NewColumnarBackend

func NewColumnarBackend(headers Headers) *columnarBackend

Types

type ApplyFunction

type ApplyFunction func(value types.TypedValue) types.TypedValue

type Backend

type Backend interface {
	GetHeaders() Headers
	GetRowCount() int
	GetRow(id int) Row
	AppendRow(row ...Row)
	ForEachRow(visitor RowVisitor)
	ForEachColumn(visitor ColumnVisitor)
	AddColumn(name string, kind types.TypeKind, mutateFn MutateFunction)
	UpdateColumn(name string, mutateFn MutateFunction)
	RemoveRows(ids ...int)
	RemoveColumn(name string)
	RenameColumn(old string, new string)
	SortByColumn(column string, order Ordering)
	ConstructNew(headers Headers) Backend
	SetColumns(columns Columns)
	CastColumn(name string, toKind types.TypeKind)
	ApplyOnColumn(name string, fn ApplyFunction)
}

func New

func New(headers Headers) Backend

type Cell

type Cell struct {
	types.TypedValue
	// contains filtered or unexported fields
}

type Column

type Column []Cell

type ColumnVisitor

type ColumnVisitor func(header string, values Column)

type Columns

type Columns map[string]Column

func (*Columns) GetHeaders

func (c *Columns) GetHeaders() Headers

type Header

type Header struct {
	Name    string
	Kind    types.TypeKind
	Visible bool
}

type Headers

type Headers []Header

type MutateFunction

type MutateFunction func(id int, row Row) types.TypedValue

type Ordering

type Ordering bool

const (
	Asc  Ordering = true
	Desc Ordering = false
)

type Row

type Row map[string]types.TypedValue

type RowVisitor

type RowVisitor func(id int, row Row)