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feat: tea.Batch() returns nil if all Cmds were nil #200

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feat: tea.Batch() returns nil if all Cmds were nil #200

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fc479b4
feat: tea.Batch() returns nil if all Cmds were nil
gkdr Jan 22, 2022
6c42177
docs: specify behaviour in comment
gkdr Jan 22, 2022
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13 changes: 13 additions & 0 deletions tea.go
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Expand Up @@ -111,6 +111,8 @@ type Program struct {

// Batch performs a bunch of commands concurrently with no ordering guarantees
// about the results. Use a Batch to return several commands.
// If the slice of commands has a length of 0 or only contains nil commands,
// the function itself returns nil.
//
// Example:
//
Expand All @@ -122,6 +124,17 @@ func Batch(cmds ...Cmd) Cmd {
if len(cmds) == 0 {
return nil
}

nilCount := 0
for _, cmd := range cmds {
if cmd == nil {
nilCount++
}
}
if nilCount == len(cmds) {
return nil
}

return func() Msg {
return batchMsg(cmds)
}
Expand Down