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<b>0.11.</b>
Even or Odd
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<b>0.12.</b>
Exit nested loop
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<b>0.13.</b>
#1 Fooling around boolean
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#2 Fooling around boolean
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Ghost Array
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Input Search
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Invaluable
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<b>0.18.</b>
JSON
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<b>0.19.</b>
Nested Scopes
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<b>0.20.</b>
Now you see me...
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Frozen
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<b>0.22.</b>
Point
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Running Man
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<b>0.24.</b>
Scope
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<b>0.25.</b>
Spartacus
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Terminator
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Timers
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<b>0.28.</b>
Undefined Values in Arrays
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<b>0.29.</b>
Array Map and ParseInt
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<b>0.30.</b>
Variable Scope
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<section class="normal" id="section-gitbook_121">
<h1 id="point">Point</h1>
<p>This challenge needs you to implement a Point class so that the following code returns true.</p>
<pre><code>new Point( new Point(10, 20) + new Point(30, 50) ).toString() === '{40,70}';
</code></pre>
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<h2>Exercise</h2>
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<b>Correct!</b>
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<b>False!</b>
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<p>Implement Point and assume that:</p>
<ul>
<li>Must be generic and be able to handle x and y values from 0..999</li>
<li>The requirements to do it are to implement valueOf and/or toString methods.</li>
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<pre class="hidden code-solution">var Point = function (x, y) {
if(typeof x === 'string') {
this.convertStringToCoordinates(x);
}else{
this.x = x;
this.y = y;
}
};
Point.prototype.convertStringToCoordinates = function ( value ) {
var arr, index, len, item;
this.x = 0;
this.y = 0;
arr = JSON.parse('[' + value.replace(/{/g,'[').replace(/}/g,']').replace( new RegExp('\\]\\[', 'g'), '],[') + ']');
len = arr.length;
for(index = 0; index < len; index++) {
item = arr[index];
this.x += item[0];
this.y += item[1];
}
};
Point.prototype.toString = function () {
return '{' + this.x + ',' + this.y + '}';
};</pre>
<pre class="hidden code-validation">assert(new Point( new Point(10, 20) + new Point(30, 50) ).toString() === '{40,70}');</pre>
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