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type="button" class="clean-btn tocCollapsibleButton_iI2p">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Transform operators</h1><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="map">map<a href="#map" class="hash-link" aria-label="Direct link to map" title="Direct link to map"></a></h2><p>Applies a converter function to converts the observed value into a new value.</p><img loading="lazy" alt="output.svg" src="data:image/svg+xml;base64,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" width="312" height="260" class="img_SS3x"><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> from</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> map </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/observables"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> obs </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">from</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">2</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">obs</span><br></span><span class="token-line theme-code-block-highlighted-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">pipe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token function" style="color:#8250DF">map</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> v </span><span class="token operator" style="color:#D73A49">*</span><span class="token plain"> v</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">subscribe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> </span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">log</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_z5j7" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_FoOz"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_L0B6"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="scan">scan<a href="#scan" class="hash-link" aria-label="Direct link to scan" title="Direct link to scan"></a></h2><p>Applies an accumulator (or "reducer function") to each value from the source.</p><img loading="lazy" alt="output.svg" src="data:image/svg+xml;base64,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" width="372" height="260" class="img_SS3x"><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> from</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> scan </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/observables"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> obs </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">from</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">2</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">obs</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">pipe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span><br></span><span class="token-line theme-code-block-highlighted-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#8250DF">scan</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">p</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> c</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"> </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> p </span><span class="token operator" style="color:#D73A49">+</span><span class="token plain"> c</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">0</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">subscribe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> </span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">log</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_z5j7" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_FoOz"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_L0B6"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="timestamp">timestamp<a href="#timestamp" class="hash-link" aria-label="Direct link to timestamp" title="Direct link to timestamp"></a></h2><p>Wraps value in an object with a <code>timestamp</code> property and <code>lastTimestamp</code> property.</p><img loading="lazy" alt="output.svg" src="data:image/svg+xml;base64,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" width="232" height="410" class="img_SS3x"><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> from</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> timestamp </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/observables"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> obs </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">from</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">2</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">obs</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">pipe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span><br></span><span class="token-line theme-code-block-highlighted-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#8250DF">timestamp</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">subscribe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> </span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">log</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_z5j7" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_FoOz"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_L0B6"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithHideOnScrollNavbar_pMLv" id="switchmap">switchMap<a href="#switchmap" class="hash-link" aria-label="Direct link to switchMap" title="Direct link to switchMap"></a></h2><p>Takes a source Observable and calls transform(T) for each emitted value.
It will immediately subscribe to any Observable coming from transform(T), b
ut in addition to this, will unsubscribe() from any prior Observables -
so that there is only ever one Observable subscribed at any one time.</p><img loading="lazy" alt="output.svg" src="data:image/svg+xml;base64,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" width="702" height="260" class="img_SS3x"><div class="language-ts codeBlockContainer_mQmQ theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_D5yF"><pre tabindex="0" class="prism-code language-ts codeBlock_RMoD thin-scrollbar"><code class="codeBlockLines_AclH"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#CF222E">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">{</span><span class="token plain"> from</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> switchMap </span><span class="token punctuation" style="color:#393A34">}</span><span class="token plain"> </span><span class="token keyword" style="color:#CF222E">from</span><span class="token plain"> </span><span class="token string" style="color:#C6105F">"@devicescript/observables"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token keyword" style="color:#CF222E">const</span><span class="token plain"> obs </span><span class="token operator" style="color:#D73A49">=</span><span class="token plain"> </span><span class="token function" style="color:#8250DF">from</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">2</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">3</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">obs</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">pipe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span><br></span><span class="token-line theme-code-block-highlighted-line" style="color:#393A34"><span class="token plain"> </span><span class="token function" style="color:#8250DF">switchMap</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> </span><span class="token function" style="color:#8250DF">from</span><span class="token punctuation" style="color:#393A34">(</span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">+</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> v </span><span class="token operator" style="color:#D73A49">+</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> v </span><span class="token operator" style="color:#D73A49">+</span><span class="token plain"> </span><span class="token number" style="color:#005CC5">1</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">subscribe</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v </span><span class="token operator" style="color:#D73A49">=></span><span class="token plain"> </span><span class="token builtin">console</span><span class="token punctuation" style="color:#393A34">.</span><span class="token function" style="color:#8250DF">log</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">v</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">)</span><br></span></code></pre><div class="buttonGroup_aaMX"><button type="button" 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