# 自定义方法
计算长度
```
<pre class="calibre16">```
<span class="token5">function</span> <span class="token1">table_leng</span><span class="token2">(</span>t<span class="token2">)</span>
local leng<span class="token">=</span><span class="token3">0</span>
<span class="token5">for</span> k<span class="token2">,</span> v <span class="token5">in</span> <span class="token1">pairs</span><span class="token2">(</span>t<span class="token2">)</span> <span class="token5">do</span>
leng<span class="token">=</span>leng<span class="token">+</span><span class="token3">1</span>
end
<span class="token5">return</span> leng<span class="token2">;</span>
end
<span class="token5">function</span> <span class="token1">trim</span><span class="token2">(</span>s<span class="token2">)</span>
<span class="token5">return</span> <span class="token2">(</span>string<span class="token2">.</span><span class="token1">gsub</span><span class="token2">(</span>s<span class="token2">,</span> <span class="token4">"^%s*(.-)%s*$"</span><span class="token2">,</span> <span class="token4">"%1"</span><span class="token2">)</span><span class="token2">)</span>
end
打印表
<span class="token5">function</span> print_r <span class="token2">(</span> t <span class="token2">)</span>
local print_r_cache<span class="token">=</span><span class="token2">{</span><span class="token2">}</span>
local <span class="token5">function</span> <span class="token1">sub_print_r</span><span class="token2">(</span>t<span class="token2">,</span>indent<span class="token2">)</span>
<span class="token5">if</span> <span class="token2">(</span>print_r_cache<span class="token2">[</span><span class="token1">tostring</span><span class="token2">(</span>t<span class="token2">)</span><span class="token2">]</span><span class="token2">)</span> then
<span class="token1">print</span><span class="token2">(</span>indent<span class="token2">.</span><span class="token2">.</span><span class="token4">"*"</span><span class="token2">.</span><span class="token2">.</span><span class="token1">tostring</span><span class="token2">(</span>t<span class="token2">)</span><span class="token2">)</span>
<span class="token5">else</span>
print_r_cache<span class="token2">[</span><span class="token1">tostring</span><span class="token2">(</span>t<span class="token2">)</span><span class="token2">]</span><span class="token">=</span><span class="token3">true</span>
<span class="token5">if</span> <span class="token2">(</span><span class="token1">type</span><span class="token2">(</span>t<span class="token2">)</span><span class="token">==</span><span class="token4">"table"</span><span class="token2">)</span> then
<span class="token5">for</span> pos<span class="token2">,</span>val <span class="token5">in</span> <span class="token1">pairs</span><span class="token2">(</span>t<span class="token2">)</span> <span class="token5">do</span>
<span class="token5">if</span> <span class="token2">(</span><span class="token1">type</span><span class="token2">(</span>val<span class="token2">)</span><span class="token">==</span><span class="token4">"table"</span><span class="token2">)</span> then
<span class="token1">print</span><span class="token2">(</span>indent<span class="token2">.</span><span class="token2">.</span><span class="token4">"["</span><span class="token2">.</span><span class="token2">.</span>pos<span class="token2">.</span><span class="token2">.</span><span class="token4">"] => "</span><span class="token2">.</span><span class="token2">.</span><span class="token1">tostring</span><span class="token2">(</span>t<span class="token2">)</span><span class="token2">.</span><span class="token2">.</span><span class="token4">" {"</span><span class="token2">)</span>
<span class="token1">sub_print_r</span><span class="token2">(</span>val<span class="token2">,</span>indent<span class="token2">.</span><span class="token2">.</span>string<span class="token2">.</span><span class="token1">rep</span><span class="token2">(</span><span class="token4">" "</span><span class="token2">,</span>string<span class="token2">.</span><span class="token1">len</span><span class="token2">(</span>pos<span class="token2">)</span><span class="token">+</span><span class="token3">8</span><span class="token2">)</span><span class="token2">)</span>
<span class="token1">print</span><span class="token2">(</span>indent<span class="token2">.</span><span class="token2">.</span>string<span class="token2">.</span><span class="token1">rep</span><span class="token2">(</span><span class="token4">" "</span><span class="token2">,</span>string<span class="token2">.</span><span class="token1">len</span><span class="token2">(</span>pos<span class="token2">)</span><span class="token">+</span><span class="token3">6</span><span class="token2">)</span><span class="token2">.</span><span class="token2">.</span><span class="token4">"}"</span><span class="token2">)</span>
elseif <span class="token2">(</span><span class="token1">type</span><span class="token2">(</span>val<span class="token2">)</span><span class="token">==</span><span class="token4">"string"</span><span class="token2">)</span> then
<span class="token1">print</span><span class="token2">(</span>indent<span class="token2">.</span><span class="token2">.</span><span class="token4">"["</span><span class="token2">.</span><span class="token2">.</span>pos<span class="token2">.</span><span class="token2">.</span><span class="token4">'] => "'</span><span class="token2">.</span><span class="token2">.</span>val<span class="token2">.</span><span class="token2">.</span><span class="token4">'"'</span><span class="token2">)</span>
<span class="token5">else</span>
<span class="token1">print</span><span class="token2">(</span>indent<span class="token2">.</span><span class="token2">.</span><span class="token4">"["</span><span class="token2">.</span><span class="token2">.</span>pos<span class="token2">.</span><span class="token2">.</span><span class="token4">"] => "</span><span class="token2">.</span><span class="token2">.</span><span class="token1">tostring</span><span class="token2">(</span>val<span class="token2">)</span><span class="token2">)</span>
end
end
<span class="token5">else</span>
<span class="token1">print</span><span class="token2">(</span>indent<span class="token2">.</span><span class="token2">.</span><span class="token1">tostring</span><span class="token2">(</span>t<span class="token2">)</span><span class="token2">)</span>
end
end
end
<span class="token5">if</span> <span class="token2">(</span><span class="token1">type</span><span class="token2">(</span>t<span class="token2">)</span><span class="token">==</span><span class="token4">"table"</span><span class="token2">)</span> then
<span class="token1">print</span><span class="token2">(</span><span class="token1">tostring</span><span class="token2">(</span>t<span class="token2">)</span><span class="token2">.</span><span class="token2">.</span><span class="token4">" {"</span><span class="token2">)</span>
<span class="token1">sub_print_r</span><span class="token2">(</span>t<span class="token2">,</span><span class="token4">" "</span><span class="token2">)</span>
<span class="token1">print</span><span class="token2">(</span><span class="token4">"}"</span><span class="token2">)</span>
<span class="token5">else</span>
<span class="token1">sub_print_r</span><span class="token2">(</span>t<span class="token2">,</span><span class="token4">" "</span><span class="token2">)</span>
end
<span class="token1">print</span><span class="token2">(</span><span class="token2">)</span>
end
去重复
<span class="token5">function</span> <span class="token1">table_unique</span><span class="token2">(</span>t<span class="token2">)</span>
local check <span class="token">=</span> <span class="token2">{</span><span class="token2">}</span><span class="token2">;</span>
local n <span class="token">=</span> <span class="token2">{</span><span class="token2">}</span><span class="token2">;</span>
<span class="token5">for</span> key <span class="token2">,</span> value <span class="token5">in</span> <span class="token1">pairs</span><span class="token2">(</span>t<span class="token2">)</span> <span class="token5">do</span>
<span class="token5">if</span> not check<span class="token2">[</span>value<span class="token2">]</span> then
n<span class="token2">[</span>key<span class="token2">]</span> <span class="token">=</span> value
check<span class="token2">[</span>value<span class="token2">]</span> <span class="token">=</span> value
end
end
<span class="token5">return</span> n
end
```
```
- 简介
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