\u5b57\u7b26\u4e32
\n<\/strong><\/div>\n
\u53ef\u4ee5\u4f7f\u7528\u5355\u5f15\u53f7\u548c\u53cc\u5f15\u53f7\u5b9a\u4e49\u5b57\u7b26\u4e32\u53d8\u91cf\u4f46\u662f\u5355\u5f15\u53f7\u4e2d\u4e0d\u652f\u6301\u53d8\u91cf\u89e3\u6790<\/p>\n
#! \/bin\/bash\r\nusername=\"mayuan\"\r\nstr_1=\"hello ${username}\"\r\nstr_2='hello ${username}'\r\necho $str_1 # hello mayuan\r\necho $str_2 # hello ${username}\r\n<\/pre>\n
\u83b7\u53d6\u5b57\u7b26\u4e32\u7684\u957f\u5ea6<\/strong><\/span><\/div>\n
#! \/bin\/bash\r\nusername=\"mayuan\"\r\necho ${#username} # 6\r\n<\/pre>\n
\u622a\u53d6\u5b57\u7b26\u4e32<\/strong><\/span><\/div>\n
#! \/bin\/bash\r\nusername=\"mayuan\"\r\necho ${username:1:3} # \u4ece\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u5f00\u59cb\u622a\u53d63\u4e2a\u5b57\u7b26\u8f93\u51fa\"ayu\"\r\n<\/pre>\n
\u67e5\u627e\u6307\u5b9a\u5b57\u7b26<\/strong><\/span><\/div>\n
#! \/bin\/bash\r\nusername=\"mayuan\"\r\necho $(expr index \"${username}\" y) #\u67e5\u627ey\u5728\u6307\u5b9a\u5b57\u7b26\u7684\u4f4d\u7f6e\r\n<\/pre>\n
\u6570\u7ec4<\/strong><\/div>\n
#! \/bin\/bash\r\narr=(1 2 3 4 5)\r\necho ${arr[0]} #\u8f93\u51fa1\r\necho ${arr[1]} #\u8f93\u51fa2\r\n<\/pre>\n
\u83b7\u53d6\u6570\u7ec4\u957f\u5ea6<\/strong><\/span><\/div>\n
#! \/bin\/bash\r\narr=(1 2 3 4 5)\r\necho ${#arr[@]} #\u8f93\u51fa5\r\necho ${#arr[*]}\r\n<\/pre>\n
\u5c06\u5b57\u7b26\u4e32\u5206\u9694\u6210\u6570\u7ec4<\/strong><\/span><\/div>\n
#!\/bin\/bash\r\na=\"hello,world,nice,to,meet,you\"\r\n#\u8981\u5c06$a\u5206\u5272\u5f00\uff0c\u5148\u5b58\u50a8\u65e7\u7684\u5206\u9694\u7b26\r\nOLD_IFS=\"$IFS\"\r\n#\u8bbe\u7f6e\u5206\u9694\u7b26\r\nIFS=\",\"\r\n#\u5982\u4e0b\u4f1a\u81ea\u52a8\u5206\u9694\r\narr=($a)\r\n#\u6062\u590d\u539f\u6765\u7684\u5206\u9694\u7b26\r\nIFS=\"$OLD_IFS\"\r\n#\u904d\u5386\u6570\u7ec4\r\nfor s in ${arr[@]}\r\ndo\r\necho \"$s\"\r\ndone\r\n#!\/bin\/bash\r\na=\"hello,world,nice,to,meet,you\"\r\n#\u8981\u5c06$a\u5206\u5272\u5f00\uff0c\u5148\u5b58\u50a8\u65e7\u7684\u5206\u9694\u7b26\r\nOLD_IFS=\"$IFS\"\r\n#\u8bbe\u7f6e\u5206\u9694\u7b26\r\nIFS=\",\" \r\n#\u5982\u4e0b\u4f1a\u81ea\u52a8\u5206\u9694\r\narr=($a)\r\n#\u6062\u590d\u539f\u6765\u7684\u5206\u9694\u7b26\r\nIFS=\"$OLD_IFS\"\r\n#\u904d\u5386\u6570\u7ec4\r\nfor s in ${arr[@]}\r\ndo\r\necho \"$s\"\r\ndone\r\n<\/pre>\n
\u53d8\u91cf$IFS\u5b58\u50a8\u7740\u5206\u9694\u7b26\uff0c\u8fd9\u91cc\u6211\u4eec\u5c06\u5176\u8bbe\u4e3a\u9017\u53f7 \",\" OLD_IFS\u7528\u4e8e\u5907\u4efd\u9ed8\u8ba4\u7684\u5206\u9694\u7b26\uff0c\u4f7f\u7528\u5b8c\u540e\u5c06\u4e4b\u6062\u590d\u9ed8\u8ba4\u3002<\/p>\n
\n
arr=($a)\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32$a\u6309IFS\u5206\u9694\u7b26\u5206\u5272\u5230\u6570\u7ec4$arr<\/li>\n
${arr[0]} ${arr[1]} ... \u5206\u522b\u5b58\u50a8\u5206\u5272\u540e\u7684\u6570\u7ec4\u7b2c1 2 ... \u9879<\/li>\n
${arr[@]}\u5b58\u50a8\u6574\u4e2a\u6570\u7ec4\u3002<\/li>\n
${!arr[@]}\u5b58\u50a8\u6574\u4e2a\u7d22\u5f15\u503c\uff1a1 2 3 4 ...<\/li>\n
${#arr[@]} \u83b7\u53d6\u6570\u7ec4\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
\u53ef\u4ee5\u4f7f\u7528\u5355\u5f15\u53f7\u548c\u53cc\u5f15\u53f7\u5b9a\u4e49\u5b57\u7b26\u4e32\u53d8\u91cf\u4f46\u662f\u5355\u5f15\u53f7\u4e2d\u4e0d\u652f\u6301\u53d8\u91cf\u89e3\u6790 #! \/bin\/bash username=” […]<\/p>\n","protected":false},"author":362,"featured_media":204563,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[55],"tags":[],"class_list":["post-204559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-thread"],"acf":[],"_links":{"self":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/204559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/users\/362"}],"replies":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/comments?post=204559"}],"version-history":[{"count":6,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/204559\/revisions"}],"predecessor-version":[{"id":204636,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/posts\/204559\/revisions\/204636"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media\/204563"}],"wp:attachment":[{"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/media?parent=204559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/categories?post=204559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lrxjmw.cn\/wp-json\/wp\/v2\/tags?post=204559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}