string-to-url-lcci

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LCCI

Write a method to replace all spaces in a string with &#39;%20&#39;. You may assume that the string has sufficient space at the end to hold the additional characters,and that you are given the &quot;true&quot; length of the string. (Note: If implementing in Java,please use a character array so that you can perform this operation in place.)

Example 1:

<pre>
Input: &quot;Mr John Smith &quot;, 13
Output: &quot;Mr%20John%20Smith&quot;
</pre>

Example 2:

<pre>
Input: &quot; &quot;, 5
Output: &quot;%20%20%20%20%20&quot;
</pre>

&nbsp;

Note:

<ol>
	<li><code>0 &lt;= S.length &lt;= 500000</code></li>
</ol>

replaceSpaces

String to URL LCCI

String

URL化。编写一种方法，将字符串中的空格全部替换为<code>%20</code>。假定该字符串尾部有足够的空间存放新增字符，并且知道字符串的“真实”长度。（注：用<code>Java</code>实现的话，请使用字符数组实现，以便直接在数组上操作。）

 

示例 1：

<pre>
输入："Mr John Smith ", 13
输出："Mr%20John%20Smith"
</pre>

示例 2：

<pre>
输入：" ", 5
输出："%20%20%20%20%20"
</pre>

 

提示：

<ul>
	<li>字符串长度在 [0, 500000] 范围内。</li>
</ul>