PrependTo

Name	-	Description	Default	Type
<input>		The value to prepend to the collection.		Any
<output>		The input to this shard is passed through as its output.		Any
Collection		The collection to add the input to.	None	&[ Any ]&String&Bytes

Prepends the input to the context variable passed to :Collection.

Details

PrependTo prepends (i.e., adds to the start) its input to the variable it receives in its :Collection parameter.

This shard works on string and sequence variables.

The input to this shard is also passed through as its output.

See also

• DropFront
• PopFront
• Push
• Set
• Update

Examples

CodeOutput

;; prepend element to sequence
[1 2 3] >= .seq
0 (PrependTo .seq)   ;; prepends element to sequence
.seq (Log)           ;; updated sequence => [0, 1, 2, 3]

;; prepend character to string
"pen" >= .str
"O" (PrependTo .str) ;; prepends character to string
.str (Log)           ;; updated string => Open

[info] [shards/General/PrependTo/PrependTo.edn] [0, 1, 2, 3]
[info] [shards/General/PrependTo/PrependTo.edn] Open

 

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