{"id":2889,"date":"2016-09-18T19:02:43","date_gmt":"2016-09-18T11:02:43","guid":{"rendered":"http:\/\/ixyzero.com\/blog\/?p=2889"},"modified":"2016-09-18T19:02:43","modified_gmt":"2016-09-18T11:02:43","slug":"%e7%89%88%e6%9c%ac%e5%8f%b7%e5%a4%a7%e5%b0%8f%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/ixyzero.com\/blog\/archives\/2889.html","title":{"rendered":"\u7248\u672c\u53f7\u5927\u5c0f\u6bd4\u8f83"},"content":{"rendered":"<p>=Start=<\/p>\n<h5>\u7f18\u7531\uff1a<\/h5>\n<p>\u5728\u901b\u535a\u5ba2\u7684\u65f6\u5019\u53d1\u73b0\u4e00\u7bc7\u597d\u73a9\u7684\u6587\u7ae0\u300c<a href=\"http:\/\/blog.phpdr.net\/bash%E6%AF%94%E8%BE%83%E7%89%88%E6%9C%AC%E5%8F%B7.html\" target=\"_blank\">Bash\u6bd4\u8f83\u7248\u672c\u53f7<\/a>\u300d\uff0c\u60f3\u8d77\u6765\u4e4b\u524d\u6709\u8fc7\u7c7b\u4f3c\u7684\u60f3\u6cd5\uff0c\u4f46\u4e00\u76f4\u6ca1\u6709\u53bb\u5b9e\u73b0\uff0c\u73b0\u5728\u597d\u4e86\uff0c\u6709\u73b0\u6210\u7684\u7248\u672c\u53ef\u7528\u4e86^_^<\/p>\n<p>\u539f\u6587\u7ed9\u51fa\u4e86\u7528Bash\u7f16\u7a0b\u5b9e\u73b0\u7684\u7248\u672c\u6bd4\u8f83\u4ee3\u7801\uff0c\u540e\u6765\u6211\u53c8\u627e\u5230\u4e86Python\u5b9e\u73b0\u7684\u7248\u672c\uff0c\u4ee5\u540e\u518d\u770b\u770b\u6709\u6ca1\u6709\u7528PHP\u6216C\u8bed\u8a00\u5b9e\u73b0\u7684\u7248\u672c\uff0c\u6ca1\u6709\u7684\u8bdd\u53ef\u4ee5\u53c2\u7167\u7740\u81ea\u5df1\u5b9e\u73b0\u4e00\u4e0b\uff0c\u5c31\u5f53\u662f\u505a\u4e2a\u7ec3\u4e60\u4e86\u3002<\/p>\n<h5>\u53c2\u8003\u89e3\u7b54\uff1a<\/h5>\n<h6>\u4e00\u4e2a\u9009\u62e9\u662fsort\u547d\u4ee4\uff08GNU coreutils &gt;= 7\uff09\uff1a<\/h6>\n<pre class=\"lang:default decode:true\">$ sort --version\nsort (GNU coreutils) 8.21\nCopyright (C) 2013 Free Software Foundation, Inc.\nLicense GPLv3+: GNU GPL version 3 or later &lt;http:\/\/gnu.org\/licenses\/gpl.html&gt;.\nThis is free software: you are free to change and redistribute it.\nThere is NO WARRANTY, to the extent permitted by law.\n\nWritten by Mike Haertel and Paul Eggert.\n\n$ sort --help\n...\n  -V, --version-sort          natural sort of (version) numbers within text\n...\n\n$ printf '2.4.5\\n2.8\\n2.4.5.1\\n' | sort -V\n2.4.5\n2.4.5.1\n2.8<\/pre>\n<h6>\u53e6\u4e00\u4e2a\u66f4\u901a\u7528\u7684\u9009\u62e9\u662f<span style=\"color: #ff0000;\">Bash\u7f16\u7a0b\u5b9e\u73b0<\/span>\uff08\u4e0d\u4f9d\u8d56\u4efb\u4f55\u5916\u90e8\u5de5\u5177\uff09\uff1a<\/h6>\n<pre class=\"lang:default decode:true\">#!\/bin\/bash\nvercomp () {\n    if [[ $1 == $2 ]]\n    then\n        return 0\n    fi\n    local IFS=.\n    local i ver1=($1) ver2=($2)\n    # fill empty fields in ver1 with zeros\n    for ((i=${#ver1[@]}; i&lt;${#ver2[@]}; i++))\n    do\n        ver1[i]=0\n    done\n    for ((i=0; i&lt;${#ver1[@]}; i++))\n    do\n        if [[ -z ${ver2[i]} ]]\n        then\n            # fill empty fields in ver2 with zeros\n            ver2[i]=0\n        fi\n        if ((10#${ver1[i]} &gt; 10#${ver2[i]}))\n        then\n            return 1\n        fi\n        if ((10#${ver1[i]} &lt; 10#${ver2[i]}))\n        then\n            return 2\n        fi\n    done\n    return 0\n}\n\ntestvercomp () {\n    vercomp $1 $2\n    case $? in\n        0) op='=';;\n        1) op='&gt;';;\n        2) op='&lt;';;\n    esac\n    if [[ $op != $3 ]]\n    then\n        echo \"FAIL: Expected '$3', Actual '$op', Arg1 '$1', Arg2 '$2'\"\n    else\n        echo \"Pass: '$1 $op $2'\"\n    fi\n}\n\n# Run tests\n# argument table format:\n# testarg1   testarg2     expected_relationship\necho \"The following tests should pass\"\nwhile read -r test\ndo\n    testvercomp $test\ndone &lt;&lt; EOF\n1            1            =\n2.1          2.2          &lt;\n3.0.4.10     3.0.4.2      &gt;\n4.08         4.08.01      &lt;\n3.2.1.9.8144 3.2          &gt;\n3.2          3.2.1.9.8144 &lt;\n1.2          2.1          &lt;\n2.1          1.2          &gt;\n5.6.7        5.6.7        =\n1.01.1       1.1.1        =\n1.1.1        1.01.1       =\n1            1.0          =\n1.0          1            =\n1.0.2.0      1.0.2        =\n1..0         1.0          =\n1.0          1..0         =\nEOF\n\necho \"The following test should fail (test the tester)\"\ntestvercomp 1 1 '&gt;'<\/pre>\n<h6>\u7528Python\u5b9e\u73b0\u7684\u7248\u672c\uff1a<\/h6>\n<pre class=\"lang:default decode:true\">#!\/usr\/bin\/env python\n# coding=utf-8\n\nimport re\n\ndef mycmp(version1, version2):\n    def normalize(v):\n        return [int(x) for x in re.sub(r'(\\.0+)*$','', v).split(\".\")]\n    return cmp(normalize(version1), normalize(version2))\n\nassert mycmp(\"1\", \"1\") == 0\nassert mycmp(\"2.1\", \"2.2\") &lt; 0\nassert mycmp(\"3.0.4.10\", \"3.0.4.2\") &gt; 0\nassert mycmp(\"4.08\", \"4.08.01\") &lt; 0\nassert mycmp(\"3.2.1.9.8144\", \"3.2\") &gt; 0\nassert mycmp(\"3.2\", \"3.2.1.9.8144\") &lt; 0\nassert mycmp(\"1.2\", \"2.1\") &lt; 0\nassert mycmp(\"2.1\", \"1.2\") &gt; 0\nassert mycmp(\"5.6.7\", \"5.6.7\") == 0\nassert mycmp(\"1.01.1\", \"1.1.1\") == 0\nassert mycmp(\"1.1.1\", \"1.01.1\") == 0\nassert mycmp(\"1\", \"1.0\") == 0\nassert mycmp(\"1.0\", \"1\") == 0\nassert mycmp(\"1.0\", \"1.0.1\") &lt; 0\nassert mycmp(\"1.0.1\", \"1.0\") &gt; 0\nassert mycmp(\"1.0.2.0\", \"1.0.2\") == 0<\/pre>\n<h6>\u53e6\u4e00\u4e2aBash\u7f16\u7a0b\u5b9e\u73b0\u7684\u7248\u672c\uff08\u6682\u672a\u6d4b\u8bd5\uff09\uff1a<\/h6>\n<pre class=\"lang:default decode:true\">#!\/bin\/bash\n\ndo_version_check() {\n\n   [ \"$1\" == \"$2\" ] &amp;&amp; return 10\n\n   ver1front=`echo $1 | cut -d \".\" -f -1`\n   ver1back=`echo $1 | cut -d \".\" -f 2-`\n\n   ver2front=`echo $2 | cut -d \".\" -f -1`\n   ver2back=`echo $2 | cut -d \".\" -f 2-`\n\n   if [ \"$ver1front\" != \"$1\" ] || [ \"$ver2front\" != \"$2\" ]; then\n       [ \"$ver1front\" -gt \"$ver2front\" ] &amp;&amp; return 11\n       [ \"$ver1front\" -lt \"$ver2front\" ] &amp;&amp; return 9\n\n       [ \"$ver1front\" == \"$1\" ] || [ -z \"$ver1back\" ] &amp;&amp; ver1back=0\n       [ \"$ver2front\" == \"$2\" ] || [ -z \"$ver2back\" ] &amp;&amp; ver2back=0\n       do_version_check \"$ver1back\" \"$ver2back\"\n       return $?\n   else\n           [ \"$1\" -gt \"$2\" ] &amp;&amp; return 11 || return 9\n   fi\n}\n\ndo_version_check \"$1\" \"$2\"<\/pre>\n<p>\u60c5\u51b5\u6bd4\u8f83\u7b80\u5355\u7684\u65f6\u5019\u53ef\u4ee5\u7528\u4e0b\u9762\u7684\u547d\u4ee4\u8bd5\u8bd5\uff1a<\/p>\n<pre class=\"lang:default decode:true\">$ echo '2.4.5\n2.8\n2.4.5.1\n2.10.2' | sort -t '.' -k 1,1 -k 2,2 -k 3,3 -k 4,4 -g<\/pre>\n<h5>\u53c2\u8003\u94fe\u63a5\uff1a<\/h5>\n<ul>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/4023830\/how-compare-two-strings-in-dot-separated-version-format-in-bash\">How compare two strings in dot separated version format in Bash?<\/a><\/li>\n<li><a href=\"http:\/\/blog.phpdr.net\/bash%E6%AF%94%E8%BE%83%E7%89%88%E6%9C%AC%E5%8F%B7.html\">Bash\u6bd4\u8f83\u7248\u672c\u53f7<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/1714027\/version-number-comparison\">Version number comparison<\/a><\/li>\n<li><a href=\"http:\/\/stackoverflow.com\/questions\/918886\/how-do-i-split-a-string-on-a-delimiter-in-bash\">How do I split a string on a delimiter in Bash?<\/a><\/li>\n<\/ul>\n<p>=END=<\/p>\n","protected":false},"excerpt":{"rendered":"<p>=Start= \u7f18\u7531\uff1a \u5728\u901b\u535a\u5ba2\u7684\u65f6\u5019\u53d1\u73b0\u4e00\u7bc7\u597d\u73a9\u7684\u6587\u7ae0\u300cBash\u6bd4\u8f83\u7248\u672c\u53f7\u300d\uff0c\u60f3\u8d77\u6765\u4e4b\u524d\u6709\u8fc7\u7c7b\u4f3c\u7684\u60f3\u6cd5\uff0c\u4f46\u4e00 [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,7,12],"tags":[83,657,8,292],"class_list":["post-2889","post","type-post","status-publish","format-standard","hentry","category-knowledgebase-2","category-programing","category-tools","tag-bash","tag-coreutils","tag-python","tag-sort"],"views":3719,"_links":{"self":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2889","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/comments?post=2889"}],"version-history":[{"count":0,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/posts\/2889\/revisions"}],"wp:attachment":[{"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/media?parent=2889"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/categories?post=2889"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ixyzero.com\/blog\/wp-json\/wp\/v2\/tags?post=2889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}