> ## Documentation Index
> Fetch the complete documentation index at: https://cantonfoundation-generated-reference-full-stack-preview.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# DA.Tuple

> Reference documentation for Daml module DA.Tuple.

<div class="x2mdx-ref-page x2mdx-ref-page--collection" />

<span id="module-da-tuple-81988" />

<div class="x2mdx-ref-hero">
  <p class="x2mdx-ref-eyebrow">Daml module</p>

  <h1 class="x2mdx-ref-title">DA.Tuple</h1>

  <p class="x2mdx-ref-summary">Tuple - Ubiquitous functions of tuples.</p>

  <div class="x2mdx-ref-badges">
    <span class="x2mdx-ref-badge x2mdx-ref-badge--protocol">Daml</span>

    <a class="x2mdx-ref-badge x2mdx-ref-badge--added" href="#history-added-3-4-9">Added 3.4.9</a>
  </div>

  <dl class="x2mdx-ref-meta-grid">
    <div class="x2mdx-ref-meta-item">
      <dt>Module</dt>
      <dd>DA.Tuple</dd>
    </div>

    <div class="x2mdx-ref-meta-item">
      <dt>Latest release</dt>
      <dd>3.5.7</dd>
    </div>
  </dl>
</div>

## Functions

<span id="function-da-tuple-first-48871" />

### `first`

`first` : (`a` -> `a'`) -> (`a`, `b`) -> (`a'`, `b`)

The pair obtained from a pair by application of a programmer
supplied function to the argument pair's first field.

<span id="function-da-tuple-second-48360" />

### `second`

`second` : (`b` -> `b'`) -> (`a`, `b`) -> (`a`, `b'`)

The pair obtained from a pair by application of a programmer
supplied function to the argument pair's second field.

<span id="function-da-tuple-both-63511" />

### `both`

`both` : (`a` -> `b`) -> (`a`, `a`) -> (`b`, `b`)

The pair obtained from a pair by application of a programmer
supplied function to both the argument pair's first and second
fields.

<span id="function-da-tuple-swap-76115" />

### `swap`

`swap` : (`a`, `b`) -> (`b`, `a`)

The pair obtained from a pair by permuting the order of the
argument pair's first and second fields.

<span id="function-da-tuple-dupe-14430" />

### `dupe`

`dupe` : `a` -> (`a`, `a`)

Duplicate a single value into a pair.

> dupe 12 == (12, 12)

<span id="function-da-tuple-fst3-84676" />

### `fst3`

`fst3` : (`a`, `b`, `c`) -> `a`

Extract the 'fst' of a triple.

<span id="function-da-tuple-snd3-63950" />

### `snd3`

`snd3` : (`a`, `b`, `c`) -> `b`

Extract the 'snd' of a triple.

<span id="function-da-tuple-thd3-58697" />

### `thd3`

`thd3` : (`a`, `b`, `c`) -> `c`

Extract the final element of a triple.

<span id="function-da-tuple-curry3-2900" />

### `curry3`

`curry3` : ((`a`, `b`, `c`) -> `d`) -> `a` -> `b` -> `c` -> `d`

Converts an uncurried function to a curried function.

<span id="function-da-tuple-uncurry3-51859" />

### `uncurry3`

`uncurry3` : (`a` -> `b` -> `c` -> `d`) -> (`a`, `b`, `c`) -> `d`

Converts a curried function to a function on a triple.

## History

<div class="x2mdx-ref-history" aria-label="Reference history">
  <div class="x2mdx-ref-history-event x2mdx-ref-history-event--introduced" id="history-added-3-4-9">
    <div class="x2mdx-ref-history-event-head">
      <span class="x2mdx-ref-history-event-label">Added</span>
      <code class="x2mdx-ref-history-event-version">3.4.9</code>
    </div>
  </div>
</div>