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README.md

@@ -1553,13 +1553,13 @@ initialize2DArray(2, 2, 0); // [[0,0], [0,0]]
 
 Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with their common difference `step`.
 
-Use `Array.from(Math.ceil((end+1-start)/step))` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range.
+Use `Array.from()` to create an array of the desired length, `(end - start + 1)/step`, and a map function to fill it with the desired values in the given range.
 You can omit `start` to use a default value of `0`.
 You can omit `step` to use a default value of `1`.
 
 ```js
 const initializeArrayWithRange = (end, start = 0, step = 1) =>
-  Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
+  Array.from({ length: Math.ceil((end - start + 1) / step) }, (v, i) => i * step + start);
 ```
 
 <details>

docs/array.html

@@ -198,8 +198,8 @@
 </pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initialize2darray" class="section double-padded">initialize2DArray</h3><div class="section double-padded"><p>Initializes a 2D array of given width and height and value.</p><p>Use <code>Array.map()</code> to generate h rows where each is a new array of size w initialize with value. If the value is not provided, default to <code>null</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initialize2DArray</span> <span class="token operator">=</span> <span class="token punctuation">(</span>w<span class="token punctuation">,</span> h<span class="token punctuation">,</span> val <span class="token operator">=</span> <span class="token keyword">null</span><span class="token punctuation">)</span> <span class="token operator">=></span>
   Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> h <span class="token punctuation">}).</span><span class="token function">map</span><span class="token punctuation">(()</span> <span class="token operator">=></span> Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> w <span class="token punctuation">}).</span><span class="token function">fill</span><span class="token punctuation">(</span>val<span class="token punctuation">));</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">initialize2DArray</span><span class="token punctuation">(</span><span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">);</span> <span class="token comment">// [[0,0], [0,0]]</span>
-</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initializearraywithrange" class="section double-padded">initializeArrayWithRange</h3><div class="section double-padded"><p>Initializes an array containing the numbers in the specified range where <code>start</code> and <code>end</code> are inclusive with their common difference <code>step</code>.</p><p>Use <code>Array.from(Math.ceil((end+1-start)/step))</code> to create an array of the desired length(the amounts of elements is equal to <code>(end-start)/step</code> or <code>(end+1-start)/step</code> for inclusive end), <code>Array.map()</code> to fill with the desired values in a range. You can omit <code>start</code> to use a default value of <code>0</code>. You can omit <code>step</code> to use a default value of <code>1</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initializeArrayWithRange</span> <span class="token operator">=</span> <span class="token punctuation">(</span>end<span class="token punctuation">,</span> start <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> step <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span>
+</pre><button class="primary clipboard-copy">&#128203;&nbsp;Copy to clipboard</button></div></div><div class="card fluid"><h3 id="initializearraywithrange" class="section double-padded">initializeArrayWithRange</h3><div class="section double-padded"><p>Initializes an array containing the numbers in the specified range where <code>start</code> and <code>end</code> are inclusive with their common difference <code>step</code>.</p><p>Use <code>Array.from()</code> to create an array of the desired length, <code>(end - start + 1)/step</code>, and a map function to fill it with the desired values in the given range. You can omit <code>start</code> to use a default value of <code>0</code>. You can omit <code>step</code> to use a default value of <code>1</code>.</p><pre class="language-js"><span class="token keyword">const</span> <span class="token function-variable function">initializeArrayWithRange</span> <span class="token operator">=</span> <span class="token punctuation">(</span>end<span class="token punctuation">,</span> start <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">,</span> step <span class="token operator">=</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">=></span>
-  Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> Math<span class="token punctuation">.</span><span class="token function">ceil</span><span class="token punctuation">((</span>end <span class="token operator">+</span> <span class="token number">1</span> <span class="token operator">-</span> start<span class="token punctuation">)</span> <span class="token operator">/</span> step<span class="token punctuation">) }).</span><span class="token function">map</span><span class="token punctuation">((</span>v<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> i <span class="token operator">*</span> step <span class="token operator">+</span> start<span class="token punctuation">);</span>
+  Array<span class="token punctuation">.</span><span class="token keyword">from</span><span class="token punctuation">({</span> length<span class="token punctuation">:</span> Math<span class="token punctuation">.</span><span class="token function">ceil</span><span class="token punctuation">((</span>end <span class="token operator">-</span> start <span class="token operator">+</span> <span class="token number">1</span><span class="token punctuation">)</span> <span class="token operator">/</span> step<span class="token punctuation">) }, (</span>v<span class="token punctuation">,</span> i<span class="token punctuation">)</span> <span class="token operator">=></span> i <span class="token operator">*</span> step <span class="token operator">+</span> start<span class="token punctuation">);</span>
 </pre><label class="collapse">Show examples</label><pre class="language-js"><span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">5</span><span class="token punctuation">);</span> <span class="token comment">// [0,1,2,3,4,5]</span>
 <span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">7</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">);</span> <span class="token comment">// [3,4,5,6,7]</span>
 <span class="token function">initializeArrayWithRange</span><span class="token punctuation">(</span><span class="token number">9</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">);</span> <span class="token comment">// [0,2,4,6,8]</span>

snippets/initializeArrayWithRange.md

@@ -8,7 +8,7 @@ You can omit `step` to use a default value of `1`.
 
 ```js
 const initializeArrayWithRange = (end, start = 0, step = 1) =>
-  Array.from({length: Math.ceil((end - start + 1) / step)}, (v, i) => i * step + start);
+  Array.from({ length: Math.ceil((end - start + 1) / step) }, (v, i) => i * step + start);
 ```
 
 ```js