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Onenote/Web - JS PHP/Basic JavaScript I、、、x/code snippets

	/* Immediately Invoke Function Expression */
(function IIFE(){
    console.log("Hello!");
})();



	/* First-Class Function (nested function) */
function makeAdder(x){
    // inner function add() uses 'x' for its closure over it
    function add(y){
        return y+x;
    };
    return add;
}

// record x as 1 / 10 and leave inner y later
var plusOne = makeAdder( 1 );
var plusTen = makeAdder( 10 );

// pass the 3 / 41 / 6 to the inner y
plusOne( 3 );
plusOne( 41 );
plusTen( 13 );



	/* this identifier */
function foo(){
    console.log( this.bar );
}

var bar = "global";
var obj1 = {
    bar: "obj1";
    foo: foo
};
var obj2 = {
    bar: "obj2";
};

foo();				// "global"
obj1.foo();			// "obj1"
foo.call( obj2 );	// "obj2"
new foo();			// undefined



	/* Prototypes */
var foo = {
    a: 42
};

var bar = Object.create( foo );
bar.b = "hello world";

bar.b;				// "hello world"
bar.a;				// 42 // delegated to 'foo'



	/* Polyfilling */
if(!Number.isNaN){
    Number.isNaN = function isNaN(x){
        return x !== x;
    };
}



	/* Transpiling */
// turn
function foo(a = 2){
    console.log(a);
}
// into
function foo(){
    var a = arguments[0] !== (void 0) ? arguments[0] : 2;	// void 0 === undefined
    console.log( a );
}
https://snipt.net/embed/644b4199e4954cb2c665ee20627dde51/
/raw/644b4199e4954cb2c665ee20627dde51/
644b4199e4954cb2c665ee20627dde51
js
JavaScript
80
2019-06-16T02:29:33
True
False
False
Feb 15, 2019 at 02:19 AM
/api/public/snipt/148261/
onenoteweb-jsbasic-javascript-iiicode-snippets
<table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><a href="#L-1"> 1</a> <a href="#L-2"> 2</a> <a href="#L-3"> 3</a> <a href="#L-4"> 4</a> <a href="#L-5"> 5</a> <a href="#L-6"> 6</a> <a href="#L-7"> 7</a> <a href="#L-8"> 8</a> <a href="#L-9"> 9</a> <a href="#L-10">10</a> <a href="#L-11">11</a> <a href="#L-12">12</a> <a href="#L-13">13</a> <a href="#L-14">14</a> <a href="#L-15">15</a> <a href="#L-16">16</a> <a href="#L-17">17</a> <a href="#L-18">18</a> <a href="#L-19">19</a> <a href="#L-20">20</a> <a href="#L-21">21</a> <a href="#L-22">22</a> <a href="#L-23">23</a> <a href="#L-24">24</a> <a href="#L-25">25</a> <a href="#L-26">26</a> <a href="#L-27">27</a> <a href="#L-28">28</a> <a href="#L-29">29</a> <a href="#L-30">30</a> <a href="#L-31">31</a> <a href="#L-32">32</a> <a href="#L-33">33</a> <a href="#L-34">34</a> <a href="#L-35">35</a> <a href="#L-36">36</a> <a href="#L-37">37</a> <a href="#L-38">38</a> <a href="#L-39">39</a> <a href="#L-40">40</a> <a href="#L-41">41</a> <a href="#L-42">42</a> <a href="#L-43">43</a> <a href="#L-44">44</a> <a href="#L-45">45</a> <a href="#L-46">46</a> <a href="#L-47">47</a> <a href="#L-48">48</a> <a href="#L-49">49</a> <a href="#L-50">50</a> <a href="#L-51">51</a> <a href="#L-52">52</a> <a href="#L-53">53</a> <a href="#L-54">54</a> <a href="#L-55">55</a> <a href="#L-56">56</a> <a href="#L-57">57</a> <a href="#L-58">58</a> <a href="#L-59">59</a> <a href="#L-60">60</a> <a href="#L-61">61</a> <a href="#L-62">62</a> <a href="#L-63">63</a> <a href="#L-64">64</a> <a href="#L-65">65</a> <a href="#L-66">66</a> <a href="#L-67">67</a> <a href="#L-68">68</a> <a href="#L-69">69</a> <a href="#L-70">70</a> <a href="#L-71">71</a> <a href="#L-72">72</a> <a href="#L-73">73</a> <a href="#L-74">74</a> <a href="#L-75">75</a> <a href="#L-76">76</a> <a href="#L-77">77</a> <a href="#L-78">78</a> <a href="#L-79">79</a> <a href="#L-80">80</a></pre></div></td><td class="code"><div class="highlight"><pre><span></span><span id="L-1"><a name="L-1"></a> <span class="cm">/* Immediately Invoke Function Expression */</span> </span><span id="L-2"><a name="L-2"></a><span class="p">(</span><span class="kd">function</span> <span class="nx">IIFE</span><span class="p">(){</span> </span><span id="L-3"><a name="L-3"></a> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="s2">&quot;Hello!&quot;</span><span class="p">);</span> </span><span id="L-4"><a name="L-4"></a><span class="p">})();</span> </span><span id="L-5"><a name="L-5"></a> </span><span id="L-6"><a name="L-6"></a> </span><span id="L-7"><a name="L-7"></a> </span><span id="L-8"><a name="L-8"></a> <span class="cm">/* First-Class Function (nested function) */</span> </span><span id="L-9"><a name="L-9"></a><span class="kd">function</span> <span class="nx">makeAdder</span><span class="p">(</span><span class="nx">x</span><span class="p">){</span> </span><span id="L-10"><a name="L-10"></a> <span class="c1">// inner function add() uses &#39;x&#39; for its closure over it</span> </span><span id="L-11"><a name="L-11"></a> <span class="kd">function</span> <span class="nx">add</span><span class="p">(</span><span class="nx">y</span><span class="p">){</span> </span><span id="L-12"><a name="L-12"></a> <span class="k">return</span> <span class="nx">y</span><span class="o">+</span><span class="nx">x</span><span class="p">;</span> </span><span id="L-13"><a name="L-13"></a> <span class="p">};</span> </span><span id="L-14"><a name="L-14"></a> <span class="k">return</span> <span class="nx">add</span><span class="p">;</span> </span><span id="L-15"><a name="L-15"></a><span class="p">}</span> </span><span id="L-16"><a name="L-16"></a> </span><span id="L-17"><a name="L-17"></a><span class="c1">// record x as 1 / 10 and leave inner y later</span> </span><span id="L-18"><a name="L-18"></a><span class="kd">var</span> <span class="nx">plusOne</span> <span class="o">=</span> <span class="nx">makeAdder</span><span class="p">(</span> <span class="mi">1</span> <span class="p">);</span> </span><span id="L-19"><a name="L-19"></a><span class="kd">var</span> <span class="nx">plusTen</span> <span class="o">=</span> <span class="nx">makeAdder</span><span class="p">(</span> <span class="mi">10</span> <span class="p">);</span> </span><span id="L-20"><a name="L-20"></a> </span><span id="L-21"><a name="L-21"></a><span class="c1">// pass the 3 / 41 / 6 to the inner y</span> </span><span id="L-22"><a name="L-22"></a><span class="nx">plusOne</span><span class="p">(</span> <span class="mi">3</span> <span class="p">);</span> </span><span id="L-23"><a name="L-23"></a><span class="nx">plusOne</span><span class="p">(</span> <span class="mi">41</span> <span class="p">);</span> </span><span id="L-24"><a name="L-24"></a><span class="nx">plusTen</span><span class="p">(</span> <span class="mi">13</span> <span class="p">);</span> </span><span id="L-25"><a name="L-25"></a> </span><span id="L-26"><a name="L-26"></a> </span><span id="L-27"><a name="L-27"></a> </span><span id="L-28"><a name="L-28"></a> <span class="cm">/* this identifier */</span> </span><span id="L-29"><a name="L-29"></a><span class="kd">function</span> <span class="nx">foo</span><span class="p">(){</span> </span><span id="L-30"><a name="L-30"></a> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span> <span class="k">this</span><span class="p">.</span><span class="nx">bar</span> <span class="p">);</span> </span><span id="L-31"><a name="L-31"></a><span class="p">}</span> </span><span id="L-32"><a name="L-32"></a> </span><span id="L-33"><a name="L-33"></a><span class="kd">var</span> <span class="nx">bar</span> <span class="o">=</span> <span class="s2">&quot;global&quot;</span><span class="p">;</span> </span><span id="L-34"><a name="L-34"></a><span class="kd">var</span> <span class="nx">obj1</span> <span class="o">=</span> <span class="p">{</span> </span><span id="L-35"><a name="L-35"></a> <span class="nx">bar</span><span class="o">:</span> <span class="s2">&quot;obj1&quot;</span><span class="p">;</span> </span><span id="L-36"><a name="L-36"></a> <span class="nx">foo</span><span class="o">:</span> <span class="nx">foo</span> </span><span id="L-37"><a name="L-37"></a><span class="p">};</span> </span><span id="L-38"><a name="L-38"></a><span class="kd">var</span> <span class="nx">obj2</span> <span class="o">=</span> <span class="p">{</span> </span><span id="L-39"><a name="L-39"></a> <span class="nx">bar</span><span class="o">:</span> <span class="s2">&quot;obj2&quot;</span><span class="p">;</span> </span><span id="L-40"><a name="L-40"></a><span class="p">};</span> </span><span id="L-41"><a name="L-41"></a> </span><span id="L-42"><a name="L-42"></a><span class="nx">foo</span><span class="p">();</span> <span class="c1">// &quot;global&quot;</span> </span><span id="L-43"><a name="L-43"></a><span class="nx">obj1</span><span class="p">.</span><span class="nx">foo</span><span class="p">();</span> <span class="c1">// &quot;obj1&quot;</span> </span><span id="L-44"><a name="L-44"></a><span class="nx">foo</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span> <span class="nx">obj2</span> <span class="p">);</span> <span class="c1">// &quot;obj2&quot;</span> </span><span id="L-45"><a name="L-45"></a><span class="k">new</span> <span class="nx">foo</span><span class="p">();</span> <span class="c1">// undefined</span> </span><span id="L-46"><a name="L-46"></a> </span><span id="L-47"><a name="L-47"></a> </span><span id="L-48"><a name="L-48"></a> </span><span id="L-49"><a name="L-49"></a> <span class="cm">/* Prototypes */</span> </span><span id="L-50"><a name="L-50"></a><span class="kd">var</span> <span class="nx">foo</span> <span class="o">=</span> <span class="p">{</span> </span><span id="L-51"><a name="L-51"></a> <span class="nx">a</span><span class="o">:</span> <span class="mi">42</span> </span><span id="L-52"><a name="L-52"></a><span class="p">};</span> </span><span id="L-53"><a name="L-53"></a> </span><span id="L-54"><a name="L-54"></a><span class="kd">var</span> <span class="nx">bar</span> <span class="o">=</span> <span class="nb">Object</span><span class="p">.</span><span class="nx">create</span><span class="p">(</span> <span class="nx">foo</span> <span class="p">);</span> </span><span id="L-55"><a name="L-55"></a><span class="nx">bar</span><span class="p">.</span><span class="nx">b</span> <span class="o">=</span> <span class="s2">&quot;hello world&quot;</span><span class="p">;</span> </span><span id="L-56"><a name="L-56"></a> </span><span id="L-57"><a name="L-57"></a><span class="nx">bar</span><span class="p">.</span><span class="nx">b</span><span class="p">;</span> <span class="c1">// &quot;hello world&quot;</span> </span><span id="L-58"><a name="L-58"></a><span class="nx">bar</span><span class="p">.</span><span class="nx">a</span><span class="p">;</span> <span class="c1">// 42 // delegated to &#39;foo&#39;</span> </span><span id="L-59"><a name="L-59"></a> </span><span id="L-60"><a name="L-60"></a> </span><span id="L-61"><a name="L-61"></a> </span><span id="L-62"><a name="L-62"></a> <span class="cm">/* Polyfilling */</span> </span><span id="L-63"><a name="L-63"></a><span class="k">if</span><span class="p">(</span><span class="o">!</span><span class="nb">Number</span><span class="p">.</span><span class="nb">isNaN</span><span class="p">){</span> </span><span id="L-64"><a name="L-64"></a> <span class="nb">Number</span><span class="p">.</span><span class="nb">isNaN</span> <span class="o">=</span> <span class="kd">function</span> <span class="nb">isNaN</span><span class="p">(</span><span class="nx">x</span><span class="p">){</span> </span><span id="L-65"><a name="L-65"></a> <span class="k">return</span> <span class="nx">x</span> <span class="o">!==</span> <span class="nx">x</span><span class="p">;</span> </span><span id="L-66"><a name="L-66"></a> <span class="p">};</span> </span><span id="L-67"><a name="L-67"></a><span class="p">}</span> </span><span id="L-68"><a name="L-68"></a> </span><span id="L-69"><a name="L-69"></a> </span><span id="L-70"><a name="L-70"></a> </span><span id="L-71"><a name="L-71"></a> <span class="cm">/* Transpiling */</span> </span><span id="L-72"><a name="L-72"></a><span class="c1">// turn</span> </span><span id="L-73"><a name="L-73"></a><span class="kd">function</span> <span class="nx">foo</span><span class="p">(</span><span class="nx">a</span> <span class="o">=</span> <span class="mi">2</span><span class="p">){</span> </span><span id="L-74"><a name="L-74"></a> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span><span class="nx">a</span><span class="p">);</span> </span><span id="L-75"><a name="L-75"></a><span class="p">}</span> </span><span id="L-76"><a name="L-76"></a><span class="c1">// into</span> </span><span id="L-77"><a name="L-77"></a><span class="kd">function</span> <span class="nx">foo</span><span class="p">(){</span> </span><span id="L-78"><a name="L-78"></a> <span class="kd">var</span> <span class="nx">a</span> <span class="o">=</span> <span class="nx">arguments</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">!==</span> <span class="p">(</span><span class="k">void</span> <span class="mi">0</span><span class="p">)</span> <span class="o">?</span> <span class="nx">arguments</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">:</span> <span class="mi">2</span><span class="p">;</span> <span class="c1">// void 0 === undefined</span> </span><span id="L-79"><a name="L-79"></a> <span class="nx">console</span><span class="p">.</span><span class="nx">log</span><span class="p">(</span> <span class="nx">a</span> <span class="p">);</span> </span><span id="L-80"><a name="L-80"></a><span class="p">}</span> </span></pre></div> </td></tr></table>
--- 
+++ 
@@ -1,9 +1,11 @@
+	/* Immediately Invoke Function Expression */
 (function IIFE(){
     console.log("Hello!");
 })();
 
 
 
+	/* First-Class Function (nested function) */
 function makeAdder(x){
     // inner function add() uses 'x' for its closure over it
     function add(y){
@@ -23,6 +25,7 @@
 
 
 
+	/* this identifier */
 function foo(){
     console.log( this.bar );
 }
@@ -39,4 +42,39 @@
 foo();				// "global"
 obj1.foo();			// "obj1"
 foo.call( obj2 );	// "obj2"
-new foo();			// undefined+new foo();			// undefined
+
+
+
+	/* Prototypes */
+var foo = {
+    a: 42
+};
+
+var bar = Object.create( foo );
+bar.b = "hello world";
+
+bar.b;				// "hello world"
+bar.a;				// 42 // delegated to 'foo'
+
+
+
+	/* Polyfilling */
+if(!Number.isNaN){
+    Number.isNaN = function isNaN(x){
+        return x !== x;
+    };
+}
+
+
+
+	/* Transpiling */
+// turn
+function foo(a = 2){
+    console.log(a);
+}
+// into
+function foo(){
+    var a = arguments[0] !== (void 0) ? arguments[0] : 2;	// void 0 === undefined
+    console.log( a );
+}
--- 
+++ 
@@ -19,4 +19,24 @@
 // pass the 3 / 41 / 6 to the inner y
 plusOne( 3 );
 plusOne( 41 );
-plusTen( 13 );+plusTen( 13 );
+
+
+
+function foo(){
+    console.log( this.bar );
+}
+
+var bar = "global";
+var obj1 = {
+    bar: "obj1";
+    foo: foo
+};
+var obj2 = {
+    bar: "obj2";
+};
+
+foo();				// "global"
+obj1.foo();			// "obj1"
+foo.call( obj2 );	// "obj2"
+new foo();			// undefined
--- 
+++ 
@@ -0,0 +1,22 @@
+(function IIFE(){
+    console.log("Hello!");
+})();
+
+
+
+function makeAdder(x){
+    // inner function add() uses 'x' for its closure over it
+    function add(y){
+        return y+x;
+    };
+    return add;
+}
+
+// record x as 1 / 10 and leave inner y later
+var plusOne = makeAdder( 1 );
+var plusTen = makeAdder( 10 );
+
+// pass the 3 / 41 / 6 to the inner y
+plusOne( 3 );
+plusOne( 41 );
+plusTen( 13 );