andre/30-seconds-of-code
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Travis build: 743 [ci skip]

Browse Source
This commit is contained in:
Travis CI
2017-12-31 15:49:44 +00:00
parent 5869c4a78e
commit 7f3d62a41e
3 changed files with 21 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
README.md
View File

@ -4088,24 +4088,22 @@ isArray([1]); // true
Checks if the provided argument is array-like (i.e. is iterable). Checks if the provided argument is array-like (i.e. is iterable).
Use `Array.from()` and a `try... catch` block to check if the provided argument is array-like. Check that the object is not a function or `null` and that its `length` property is a non-negative integer below `Number.MAX_SAFE_INTEGER`.
```js ```js
const isArrayLike = arr => { const isArrayLike = val =>
try { val != null &&
Array.from(arr); typeof val != 'function' &&
return true; val.length > -1 &&
} catch (e) { val.length % 1 == 0 &&
return false; val.length <= Number.MAX_SAFE_INTEGER;
}
};
``` ```
<details> <details>
<summary>Examples</summary> <summary>Examples</summary>
```js ```js
isArrayLike(document.querySelector('.className')); // true isArrayLike(document.querySelectorAll('.className')); // true
isArrayLike('abc'); // true isArrayLike('abc'); // true
isArrayLike(null); // false isArrayLike(null); // false
``` ```

16
docs/index.html
View File

@ -853,15 +853,13 @@ hexToRGB('#fff'); // 'rgb(255, 255, 255)'
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isarray">isArray</h3></div><div class="section double-padded"><p>Checks if the given argument is an array.</p><p>Use <code>Array.isArray()</code> to check if a value is classified as an array.</p><pre><code class="language-js">const isArray = val =&gt; !!val &amp;&amp; Array.isArray(val); </code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isarray">isArray</h3></div><div class="section double-padded"><p>Checks if the given argument is an array.</p><p>Use <code>Array.isArray()</code> to check if a value is classified as an array.</p><pre><code class="language-js">const isArray = val =&gt; !!val &amp;&amp; Array.isArray(val);
</code></pre><pre><code class="language-js">isArray(null); // false </code></pre><pre><code class="language-js">isArray(null); // false
isArray([1]); // true isArray([1]); // true
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isarraylike">isArrayLike</h3></div><div class="section double-padded"><p>Checks if the provided argument is array-like (i.e. is iterable).</p><p>Use <code>Array.from()</code> and a <code>try... catch</code> block to check if the provided argument is array-like.</p><pre><code class="language-js">const isArrayLike = arr =&gt; { </code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isarraylike">isArrayLike</h3></div><div class="section double-padded"><p>Checks if the provided argument is array-like (i.e. is iterable).</p><p>Check that the object is not a function or <code>null</code> and that its <code>length</code> property is a non-negative integer below <code>Number.MAX_SAFE_INTEGER</code>.</p><pre><code class="language-js">const isArrayLike = val =&gt;
try { val != null &amp;&amp;
Array.from(arr); typeof val != 'function' &amp;&amp;
return true; val.length &gt; -1 &amp;&amp;
} catch (e) { val.length % 1 == 0 &amp;&amp;
return false; val.length &lt;= Number.MAX_SAFE_INTEGER;
} </code></pre><pre><code class="language-js">isArrayLike(document.querySelectorAll('.className')); // true
};
</code></pre><pre><code class="language-js">isArrayLike(document.querySelector('.className')); // true
isArrayLike('abc'); // true isArrayLike('abc'); // true
isArrayLike(null); // false isArrayLike(null); // false
</code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isboolean">isBoolean</h3></div><div class="section double-padded"><p>Checks if the given argument is a native boolean element.</p><p>Use <code>typeof</code> to check if a value is classified as a boolean primitive.</p><pre><code class="language-js">const isBoolean = val =&gt; typeof val === 'boolean'; </code></pre></div></div><br/><div class="card fluid"><div class="section double-padded"><h3 id="isboolean">isBoolean</h3></div><div class="section double-padded"><p>Checks if the given argument is a native boolean element.</p><p>Use <code>typeof</code> to check if a value is classified as a boolean primitive.</p><pre><code class="language-js">const isBoolean = val =&gt; typeof val === 'boolean';

8
snippets/isArrayLike.md
View File

@ -5,8 +5,12 @@ Checks if the provided argument is array-like (i.e. is iterable).
Check that the object is not a function or `null` and that its `length` property is a non-negative integer below `Number.MAX_SAFE_INTEGER`. Check that the object is not a function or `null` and that its `length` property is a non-negative integer below `Number.MAX_SAFE_INTEGER`.
```js ```js
const isArrayLike = val => const isArrayLike = val =>
val != null && typeof val != 'function' && val.length > -1 && val.length % 1 == 0 && val.length <= Number.MAX_SAFE_INTEGER; val != null &&
typeof val != 'function' &&
val.length > -1 &&
val.length % 1 == 0 &&
val.length <= Number.MAX_SAFE_INTEGER;
``` ```
```js ```js