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30secondsofcode
2019-07-04 20:26:55 +00:00
parent 3e4436e9a2
commit c908876d7b
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@ -361,7 +361,7 @@ Foo<span class="token punctuation">.</span>prototype<span class="token punctuati
.</span><span class="token function">filter</span><span class="token punctuation">(</span>k <span class="token operator">=> !</span>arr<span class="token punctuation">.</span><span class="token function">includes</span><span class="token punctuation">(</span>k<span class="token punctuation">))
.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> key<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>acc<span class="token punctuation">[</span>key<span class="token punctuation">]</span> <span class="token operator">=</span> obj<span class="token punctuation">[</span>key<span class="token punctuation">]),</span> acc<span class="token punctuation">), {});</span>
</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">omit</span><span class="token punctuation">({</span> a<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span> b<span class="token punctuation">:</span> <span class="token string">'2'</span><span class="token punctuation">,</span> c<span class="token punctuation">:</span> <span class="token number">3</span> <span class="token punctuation">}, [</span><span class="token string">'b'</span><span class="token punctuation">]);</span> <span class="token comment">// { 'a': 1, 'c': 3 }</span>
</pre></div><div class="card code-card"><div class="corner intermediate" aria-label="intermediate" title="intermediate"></div><div class="section card-content"><h4 id="omitby">omitBy</h4><p>Creates an object composed of the properties the given function returns falsey for. The function is invoked with two arguments: (value, key).</p><p>Use <code>Object.keys(obj)</code> and <code>Array.prototype.filter()</code>to remove the keys for which <code>fn</code> returns a truthy value. Use <code>Array.prototype.reduce()</code> to convert the filtered keys back to an object with the corresponding key-value pairs.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">omitBy</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> fn<span class="token punctuation">)</span> <span class="token operator">=></span>
</pre></div><div class="card code-card"><div class="corner intermediate" aria-label="intermediate" title="intermediate"></div><div class="section card-content"><h4 id="omitby">omitBy</h4><p>Creates an object composed of the properties the given function returns falsy for. The function is invoked with two arguments: (value, key).</p><p>Use <code>Object.keys(obj)</code> and <code>Array.prototype.filter()</code>to remove the keys for which <code>fn</code> returns a truthy value. Use <code>Array.prototype.reduce()</code> to convert the filtered keys back to an object with the corresponding key-value pairs.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">omitBy</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> fn<span class="token punctuation">)</span> <span class="token operator">=></span>
Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>obj<span class="token punctuation">)
.</span><span class="token function">filter</span><span class="token punctuation">(</span>k <span class="token operator">=> !</span><span class="token function">fn</span><span class="token punctuation">(</span>obj<span class="token punctuation">[</span>k<span class="token punctuation">],</span> k<span class="token punctuation">))
.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> key<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>acc<span class="token punctuation">[</span>key<span class="token punctuation">]</span> <span class="token operator">=</span> obj<span class="token punctuation">[</span>key<span class="token punctuation">]),</span> acc<span class="token punctuation">), {});</span>
@ -382,7 +382,7 @@ Foo<span class="token punctuation">.</span>prototype<span class="token punctuati
</pre></div><div class="card code-card"><div class="corner intermediate" aria-label="intermediate" title="intermediate"></div><div class="section card-content"><h4 id="pick">pick</h4><p>Picks the key-value pairs corresponding to the given keys from an object.</p><p>Use <code>Array.prototype.reduce()</code> to convert the filtered/picked keys back to an object with the corresponding key-value pairs if the key exists in the object.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">pick</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> arr<span class="token punctuation">)</span> <span class="token operator">=></span>
arr<span class="token punctuation">.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> curr<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span>curr <span class="token keyword">in</span> obj <span class="token operator">&amp;&amp;</span> <span class="token punctuation">(</span>acc<span class="token punctuation">[</span>curr<span class="token punctuation">]</span> <span class="token operator">=</span> obj<span class="token punctuation">[</span>curr<span class="token punctuation">]),</span> acc<span class="token punctuation">), {});</span>
</pre><label class="collapse">examples</label><pre class="section card-examples language-js"><span class="token function">pick</span><span class="token punctuation">({</span> a<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span> b<span class="token punctuation">:</span> <span class="token string">'2'</span><span class="token punctuation">,</span> c<span class="token punctuation">:</span> <span class="token number">3</span> <span class="token punctuation">}, [</span><span class="token string">'a'</span><span class="token punctuation">,</span> <span class="token string">'c'</span><span class="token punctuation">]);</span> <span class="token comment">// { 'a': 1, 'c': 3 }</span>
</pre></div><div class="card code-card"><div class="corner intermediate" aria-label="intermediate" title="intermediate"></div><div class="section card-content"><h4 id="pickby">pickBy</h4><p>Creates an object composed of the properties the given function returns truthy for. The function is invoked with two arguments: (value, key).</p><p>Use <code>Object.keys(obj)</code> and <code>Array.prototype.filter()</code>to remove the keys for which <code>fn</code> returns a falsey value. Use <code>Array.prototype.reduce()</code> to convert the filtered keys back to an object with the corresponding key-value pairs.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">pickBy</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> fn<span class="token punctuation">)</span> <span class="token operator">=></span>
</pre></div><div class="card code-card"><div class="corner intermediate" aria-label="intermediate" title="intermediate"></div><div class="section card-content"><h4 id="pickby">pickBy</h4><p>Creates an object composed of the properties the given function returns truthy for. The function is invoked with two arguments: (value, key).</p><p>Use <code>Object.keys(obj)</code> and <code>Array.prototype.filter()</code>to remove the keys for which <code>fn</code> returns a falsy value. Use <code>Array.prototype.reduce()</code> to convert the filtered keys back to an object with the corresponding key-value pairs.</p></div><div class="copy-button-container"><button class="copy-button" aria-label="Copy to clipboard"></button></div><pre class="section card-code language-js"><span class="token keyword">const</span> <span class="token function-variable function">pickBy</span> <span class="token operator">=</span> <span class="token punctuation">(</span>obj<span class="token punctuation">,</span> fn<span class="token punctuation">)</span> <span class="token operator">=></span>
Object<span class="token punctuation">.</span><span class="token function">keys</span><span class="token punctuation">(</span>obj<span class="token punctuation">)
.</span><span class="token function">filter</span><span class="token punctuation">(</span>k <span class="token operator">=></span> <span class="token function">fn</span><span class="token punctuation">(</span>obj<span class="token punctuation">[</span>k<span class="token punctuation">],</span> k<span class="token punctuation">))
.</span><span class="token function">reduce</span><span class="token punctuation">((</span>acc<span class="token punctuation">,</span> key<span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">((</span>acc<span class="token punctuation">[</span>key<span class="token punctuation">]</span> <span class="token operator">=</span> obj<span class="token punctuation">[</span>key<span class="token punctuation">]),</span> acc<span class="token punctuation">), {});</span>