blocks|key|2551608|text|您可以通过children[0][:bitstring][2]获得它，可以很容易地从调试器输出中看到它。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2551609|调试器输出的结构化方式是一个variable_name+=+{Class}+value列表，其中如果值不是基元或集合，则{Class}是值的类类型，在这种情况下，该部分(包括大括号)将被省略。|2551610|当value是某种类型的集合时，集合中元素的集合类型和数量显示在value所在的位置，然后从下一行开始，缩进一个额外的数量，每个元素都以accessor+=+value的形式列出。如果该值也是一个集合，那么同样的事情再次发生:集合类型和集合中元素的数量显示在value所在的位置，然后从下一行开始，并缩进一个额外的数量。所以当你看这个的时候：|2551611|children+=+Array+(101+elements)
+[0]+=+Hash+(1+element)
++bitstring+=>+Array+(100+elements)
+++key+=+{Symbol}+bitstring
+++value+=+Array+(100+elements)
++++[0]+=+1
++++[1]+=+0
++++[2]+=+1
++++[3]+=+1
++++[4]+=+1
++++[5]+=+1|code-block|syntax|javascript|2551612|你应该看到这点|2551613|2551614|children是Array|unordered-list-item|2551615|children[0]是Hash|2551616|children[0][:bitstring]是array|2551617|children[0][:bitstring][2]是:bitstring数组的第三个元素，它的值是整数1|2551618|2551619|您知道散列键是:bitstring而不是"bitstring"的方法是，对于散列，每个元素本身都是key和value的集合，所以您可以看到bitstring+=>+Array+(100+elements)行下面有两行，一行以key开头，另一行以value开头。key被列为{Symbol}+bitstring，它告诉您它是符号:bitstring。如果键是一个字符串，它就会写成key+=+"bitstring"+(注意引号)。|2551620|entityMap^0|5|Q|0|E|T|1O|7|0|1|5|W|5|1W|G|3L|5|0|0|0|0|0|8|0|0|B|0|0|N|0|0|Q|R|A|1G|1|0|0|7|A|K|B|1D|3|1H|5|1X|X|34|3|3E|5|3M|3|3S|I|4J|A|59|H|0^^$0|@$1|2|3|4|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|18|8|@$9|19|A|1A|B|C]|$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1D|8|@$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]|$9|1K|A|1L|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|1M|8|@]|D|@]|E|$M|N]]|$1|O|3|P|5|6|7|1N|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1O|8|@]|D|@]|E|$]]|$1|R|3|S|5|T|7|1P|8|@$9|1Q|A|1R|B|C]]|D|@]|E|$]]|$1|U|3|V|5|T|7|1S|8|@$9|1T|A|1U|B|C]]|D|@]|E|$]]|$1|W|3|X|5|T|7|1V|8|@$9|1W|A|1X|B|C]]|D|@]|E|$]]|$1|Y|3|Z|5|T|7|1Y|8|@$9|1Z|A|20|B|C]|$9|21|A|22|B|C]|$9|23|A|24|B|C]]|D|@]|E|$]]|$1|10|3|-4|5|6|7|25|8|@]|D|@]|E|$]]|$1|11|3|12|5|6|7|26|8|@$9|27|A|28|B|C]|$9|29|A|2A|B|C]|$9|2B|A|2C|B|C]|$9|2D|A|2E|B|C]|$9|2F|A|2G|B|C]|$9|2H|A|2I|B|C]|$9|2J|A|2K|B|C]|$9|2L|A|2M|B|C]|$9|2N|A|2O|B|C]|$9|2P|A|2Q|B|C]|$9|2R|A|2S|B|C]]|D|@]|E|$]]|$1|13|3|-4|5|6|7|2T|8|@]|D|@]|E|$]]]|14|$]]

You would get it via <code>children[0][:bitstring][2]</code>, which can be easily seen from the debugger output. 

The way the debugger output is structured is as a list of <code>variable_name = {Class} value</code> where <code>{Class}</code> is the Class type of the value if it is not a primitive or a collection, in which case that part (including the braces) is left out. 

When the <code>value</code> is some kind of collection, the collection type and number of elements in the collection is shown where the <code>value</code> goes, and then beginning on the next line, and indented an extra amount, each element is listed in the form <code>accessor = value</code>. If that value is also a collection, then the same thing goes again: the collection type and number of elements in the collection are shown where the <code>value</code> goes, and then beginning on the next line, and indented an extra amount. So when you look at this:

<pre><code>children = Array (101 elements)
 [0] = Hash (1 element)
 bitstring =&gt; Array (100 elements)
 key = {Symbol} bitstring
 value = Array (100 elements)
 [0] = 1
 [1] = 0
 [2] = 1
 [3] = 1
 [4] = 1
 [5] = 1
</code></pre>

You should see that

<ul>
<li><code>children</code> is an Array</li>
<li><code>children[0]</code> is a Hash</li>
<li><code>children[0][:bitstring]</code> is an array</li>
<li><code>children[0][:bitstring][2]</code> is the third element of the <code>:bitstring</code> array and its value is the integer <code>1</code></li>
</ul>

The way you know that the Hash key is <code>:bitstring</code> and not <code>"bitstring"</code> is that for a hash, each element is itself a collection of <code>key</code> and <code>value</code>, so you see that under the line <code>bitstring =&gt; Array (100 elements)</code> are 2 lines, one starting with <code>key</code> and one starting with <code>value</code>. The <code>key</code> is listed as <code>{Symbol} bitstring</code> which tells you it is the symbol <code>:bitstring</code>. If the key were a string, it would just say <code>key = "bitstring"</code> (note the quotation marks).

Can anyone tell me how to get nth value, lets say 3rd val (which is 1) in <code>children[0]</code> in the following debugger output? I tried <code>children[0][2]</code> but didn't work.

<pre><code>children = Array (101 elements)
 [0] = Hash (1 element)
 bitstring =&gt; Array (100 elements)
 key = {Symbol} bitstring
 value = Array (100 elements)
 [0] = 1
 [1] = 0
 [2] = 1
 [3] = 1
 [4] = 1
 [5] = 1
</code></pre>

How do I interpret this debugger output?

调试器

谁能告诉我如何在下面的调试器输出中获取children[0]中的第n个值，假设是3val(即1)？我尝试过children[0][2]，但不起作用。children = Array (101 elements) [0] = Hash (1 element)  bitstring => Array (100 elemen...

问如何解释此调试器输出？
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