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Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
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ifeq ($(origin FOO), undefined)
FOO = bar
endif
三、变量高级用法
这里介绍两种变量的高级使用方法，第一种是变量值的替换。
我们可以替换变量中的共有的部分，其格式是“$(var:a=b)”或是“${var:a=b}”，其意思是，把变量...
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[开源框架推荐]pdf2htmlEX: 高保真PDF至HTML转换 - 开源 & Github - 清泛网...
[开源框架推荐]pdf2htmlEX: 高保真PDF至HTML转换特点：单页html，嵌入字体（高保真源于此），嵌入图片，分页显示。其他类型的工具 icepdf，直接输出成一页一页的图片。pdf to html5 js 特点：单页html，嵌入字体（高保真源于此），嵌...
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What's the complete range for Chinese characters in Unicode?
... at wiki page) block name
4E00 9FEF http://www.unicode.org/charts/PDF/U4E00.pdf CJK Unified Ideographs
3400 4DBF http://www.unicode.org/charts/PDF/U3400.pdf CJK Unified Ideographs Extension A
20000 2A6DF http://www.unicode.org/charts/PDF/U20000.pdf CJK Unified Ideographs Extens...