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<meta name="description" content="按分隔符分割 方法一 a='111|222|333' OIFS=$IFS; IFS="|"; set -- $a; aa=$1;bb=$2;cc=$3; IFS=$OIFS echo $aa $bb $cc 111 222 333 方法二 echo "1,2,3,4,5"...">
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<h1 class="post-title">Shell - String Parsing</h1>
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<a href="/author/yw.html">Yw</a>
| <time datetime="周二 27 十一月 2018">周二 27 十一月 2018</time>
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<h1>按分隔符分割</h1>
<h2>方法一</h2>
<div class="highlight"><pre><span></span><span class="nv">a</span><span class="o">=</span><span class="s1">'111|222|333'</span>
<span class="nv">OIFS</span><span class="o">=</span><span class="nv">$IFS</span><span class="p">;</span> <span class="nv">IFS</span><span class="o">=</span><span class="s2">"|"</span><span class="p">;</span> <span class="nb">set</span> -- <span class="nv">$a</span><span class="p">;</span> <span class="nv">aa</span><span class="o">=</span><span class="nv">$1</span><span class="p">;</span><span class="nv">bb</span><span class="o">=</span><span class="nv">$2</span><span class="p">;</span><span class="nv">cc</span><span class="o">=</span><span class="nv">$3</span><span class="p">;</span> <span class="nv">IFS</span><span class="o">=</span><span class="nv">$OIFS</span>
<span class="nb">echo</span> <span class="nv">$aa</span> <span class="nv">$bb</span> <span class="nv">$cc</span>
</pre></div>
<p>111 222 333</p>
<h2>方法二</h2>
<div class="highlight"><pre><span></span><span class="nb">echo</span> <span class="s2">"1,2,3,4,5"</span> <span class="p">|</span> cut -d <span class="s1">','</span> -f <span class="m">1</span>,2 <span class="m">3</span>
</pre></div>
<p>1 2 3</p>
<div class="highlight"><pre><span></span><span class="nb">echo</span> <span class="s2">"1,2,3,4,5"</span> <span class="p">|</span> cut -d <span class="s1">','</span> -f1
</pre></div>
<p>1</p>
<h2>方法三</h2>
<div class="highlight"><pre><span></span><span class="nv">line</span><span class="o">=</span><span class="s2">"1,2,3,4,5,6"</span>
<span class="nv">OLD_IFS</span><span class="o">=</span><span class="nv">$IFS</span>
<span class="nv">IFS</span><span class="o">=</span><span class="s1">','</span>
<span class="nv">arr</span><span class="o">=(</span><span class="nv">$line</span><span class="o">)</span>
<span class="nb">echo</span> <span class="si">${</span><span class="nv">arr</span><span class="p">[0]</span><span class="si">}</span> <span class="si">${</span><span class="nv">arr</span><span class="p">[1]</span><span class="si">}</span> <span class="si">${</span><span class="nv">arr</span><span class="p">[2]</span><span class="si">}</span>
</pre></div>
<p>1 2 3</p>
<div class="highlight"><pre><span></span><span class="k">for</span> d in <span class="si">${</span><span class="nv">arr</span><span class="p">[@]</span><span class="si">}</span>
<span class="k">do</span>
<span class="nb">echo</span> <span class="nv">$d</span>
<span class="k">done</span>
</pre></div>
<p>1
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<h1>按索引分割</h1>
<div class="highlight"><pre><span></span><span class="nv">str</span><span class="o">=</span><span class="m">123456</span>
<span class="nb">echo</span> <span class="si">${</span><span class="nv">str</span><span class="p">:</span><span class="nv">1</span><span class="si">}</span>
</pre></div>
<p>23456</p>
<div class="highlight"><pre><span></span><span class="nb">echo</span> <span class="si">${</span><span class="nv">str</span><span class="p">:</span><span class="nv">0</span><span class="k">:-</span><span class="nv">1</span><span class="si">}</span>
</pre></div>
<p>12345</p>
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