{"id":45,"date":"2022-12-08T12:25:43","date_gmt":"2023-09-16T07:45:21","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/%e5%a6%82%e4%bd%95%e5%9c%a8ruby%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%96%b9%e6%b3%95%e3%80%82\/"},"modified":"2025-07-31T21:55:18","modified_gmt":"2025-07-31T13:55:18","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8ruby%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%96%b9%e6%b3%95%e3%80%82","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%a6%82%e4%bd%95%e5%9c%a8ruby%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%96%b9%e6%b3%95%e3%80%82\/","title":{"rendered":"Ruby\u5b57\u7b26\u4e32\u64cd\u4f5c\u6307\u5357\uff1a\u5e38\u7528\u65b9\u6cd5\u4e0e\u6280\u5de7"},"content":{"rendered":"

\u7b80\u4ecb<\/h3>\n

\u5728 Ruby \u4e2d\uff0c\u5b57\u7b26\u4e32\u62e5\u6709\u4e30\u5bcc\u7684\u5185\u7f6e\u65b9\u6cd5\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u4f7f\u5f97\u6587\u672c\u7684\u4fee\u6539\u548c\u64cd\u4f5c\u53d8\u5f97\u5f02\u5e38\u7b80\u5355\u3002\u5728\u5404\u79cd\u7a0b\u5e8f\u5f00\u53d1\u4e2d\uff0c\u8fd9\u662f\u4e00\u9879\u975e\u5e38\u5e38\u89c1\u7684\u4efb\u52a1\u3002<\/p>\n

\u672c\u6559\u7a0b\u5c06\u5f15\u5bfc\u60a8\u5b66\u4e60\u5982\u4f55\u5229\u7528 Ruby \u5b57\u7b26\u4e32\u65b9\u6cd5\u6765\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\uff1a\u786e\u5b9a\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0c\u901a\u8fc7\u7d22\u5f15\u548c\u5207\u7247\u63d0\u53d6\u5b50\u5b57\u7b26\u4e32\uff0c\u6dfb\u52a0\u548c\u5220\u9664\u7a7a\u683c\u53ca\u5176\u4ed6\u5b57\u7b26\uff0c\u6539\u53d8\u5b57\u7b26\u4e32\u4e2d\u5b57\u7b26\u7684\u5927\u5c0f\u5199\uff0c\u4ee5\u53ca\u67e5\u627e\u548c\u66ff\u6362\u6587\u672c\u3002\u5b8c\u6210\u672c\u6559\u7a0b\u540e\uff0c\u60a8\u5c06\u80fd\u591f\u5c06\u8fd9\u4e9b\u5b9e\u7528\u7684\u65b9\u6cd5\u5e94\u7528\u5230\u60a8\u81ea\u5df1\u7684 Ruby \u7a0b\u5e8f\u4e2d\u3002<\/p>\n

\u786e\u5b9a\u5b57\u7b26\u4e32\u957f\u5ea6<\/h2>\n

\u5b57\u7b26\u4e32\u65b9\u6cd5 length<\/code> \u8fd4\u56de\u5b57\u7b26\u4e32\u4e2d\u5305\u542b\u7684\u5b57\u7b26\u6570\u91cf\u3002\u5f53\u60a8\u9700\u8981\u5f3a\u5236\u6267\u884c\u6700\u5c0f\u6216\u6700\u5927\u5bc6\u7801\u957f\u5ea6\uff0c\u6216\u8005\u9700\u8981\u622a\u65ad\u8f83\u957f\u7684\u5b57\u7b26\u4e32\u4ee5\u7528\u4e8e\u7f29\u5199\u65f6\uff0c\u6b64\u65b9\u6cd5\u4f1a\u975e\u5e38\u6709\u7528\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6253\u5370\u53e5\u5b50\u957f\u5ea6\u7684\u793a\u4f8b\uff1a<\/p>\n

open_source = \"Sammy contributes to open source.\"\r\nprint open_source.length\r\n<\/code><\/pre>\n
\u8f93\u51fa<\/div>\n
33\r\n<\/code><\/pre>\n
\u8bf7\u6ce8\u610f\uff0c\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\uff0c\u5305\u62ec\u5b57\u6bcd\u3001\u6570\u5b57\u3001\u7a7a\u683c\u5b57\u7b26\u548c\u7b26\u53f7\uff0c\u90fd\u5c06\u88ab\u8ba1\u7b97\u5728\u5185\u3002<\/p>\n
\u8981\u68c0\u67e5\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff0c\u60a8\u53ef\u4ee5\u68c0\u67e5\u5176\u957f\u5ea6\u662f\u5426\u4e3a 0<\/code>\uff0c\u6216\u8005\u66f4\u7b80\u6d01\u5730\u4f7f\u7528 empty?<\/code> \u65b9\u6cd5\u3002<\/p>\n
name = \"\"\r\nname.empty? # => true\r\n\r\nname = \"Sammy\"\r\nname.empty? # => false\r\n\r\nname = \" \"\r\nname.empty? # => false\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u4e86\u89e3\u5982\u4f55\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u7d22\u5f15\u5e76\u8bbf\u95ee\u5176\u5185\u5bb9\u3002<\/p>\n
\u8bbf\u95ee\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26<\/h2>\n
\u4f7f\u7528\u5207\u7247\uff08slice\uff09\u65b9\u6cd5\u53ef\u4ee5\u83b7\u53d6\u5b57\u7b26\u4e32\u4e2d\u60a8\u60f3\u8981\u7684\u90e8\u5206\uff0c\u4ee5\u4fbf\u8fdb\u884c\u6253\u5370\u6216\u8fdb\u4e00\u6b65\u5904\u7406\u3002<\/p>\n
\u4e0e\u6570\u7ec4\u7c7b\u4f3c\uff0c\u5b57\u7b26\u4e32\u4e2d\u7684\u6bcf\u4e2a\u5b57\u7b26\u90fd\u5bf9\u5e94\u4e00\u4e2a\u7d22\u5f15\u53f7\uff0c\u7d22\u5f15\u4ece 0<\/code> \u5f00\u59cb\u8ba1\u6570\u3002<\/p>\n
\u5bf9\u4e8e\u5b57\u7b26\u4e32 “Sammy”\uff0c\u7d22\u5f15\u7684\u5206\u89e3\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
\n\n\n\n\n\n
0<\/th>\n1<\/th>\n2<\/th>\n3<\/th>\n4<\/th>\n<\/tr>\n<\/thead>\n
S<\/td>\na<\/td>\nm<\/td>\nm<\/td>\ny<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
\u5207\u7247\u65b9\u6cd5\u5141\u8bb8\u60a8\u83b7\u53d6\u5355\u4e2a\u5b57\u7b26\u6216\u4e00\u7cfb\u5217\u5b57\u7b26\u3002\u4f20\u9012\u4e00\u4e2a\u6574\u6570\u5c06\u8fd4\u56de\u8be5\u7d22\u5f15\u5904\u7684\u5b57\u7b26\u3002\u4f20\u9012\u4e24\u4e2a\u7528\u9017\u53f7\u5206\u9694\u7684\u6574\u6570\uff0c\u5219\u8868\u793a\u8fd4\u56de\u4ece\u7b2c\u4e00\u4e2a\u7d22\u5f15\u5230\u6700\u540e\u4e00\u4e2a\u7d22\u5f15\uff08\u5305\u62ec\uff09\u4e4b\u95f4\u7684\u6240\u6709\u5b57\u7b26\u3002\u5207\u7247\u65b9\u6cd5\u4e5f\u63a5\u53d7\u8303\u56f4\uff08\u5982 1..4<\/code>\uff09\u6765\u6307\u5b9a\u8981\u63d0\u53d6\u7684\u5b57\u7b26\u3002<\/p>\n
\"Sammy\".slice(0)    # => \"S\"\r\n\"Sammy\".slice(1,2)  # => \"am\"\r\n\"Sammy\".slice(1..4) # => \"ammy\"\r\n<\/code><\/pre>\n
[]<\/code> \u8bed\u6cd5\u662f slice<\/code> \u65b9\u6cd5\u7684\u522b\u540d\uff0c\u56e0\u6b64\u60a8\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u5f53\u4f5c\u6570\u7ec4\u4e00\u6837\u5904\u7406\u3002<\/p>\n
\"Sammy\"[0]    # => \"S\"\r\n\"Sammy\"[1,2]  # => \"am\"\r\n\"Sammy\"[1..4] # => \"ammy\"\r\n<\/code><\/pre>\n
\u60a8\u8fd8\u53ef\u4ee5\u901a\u8fc7\u8d1f\u7d22\u5f15\u4ece\u5b57\u7b26\u4e32\u672b\u5c3e\u8bbf\u95ee\u5355\u4e2a\u5b57\u7b26\u3002-1<\/code> \u4ee3\u8868\u5b57\u7b26\u4e32\u7684\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\uff0c-2<\/code> \u4ee3\u8868\u5012\u6570\u7b2c\u4e8c\u4e2a\u5b57\u7b26\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/p>\n
\u6700\u540e\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528 chars<\/code> \u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u7b26\u6570\u7ec4\u3002<\/p>\n
\"Sammy\".chars # => [\"S\", \"a\", \"m\", \"m\", \"y\"]\r\n<\/code><\/pre>\n
\u8fd9\u5bf9\u4e8e\u64cd\u4f5c\u6216\u8f6c\u6362\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u53ef\u80fd\u975e\u5e38\u6709\u7528\u3002<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u770b\u770b\u5982\u4f55\u6539\u53d8\u5b57\u7b26\u4e32\u4e2d\u5b57\u7b26\u7684\u5927\u5c0f\u5199\u3002<\/p>\n
\u8f6c\u6362\u4e3a\u5927\u5199\u548c\u5c0f\u5199<\/h2>\n
\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Ruby\u4e2d\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u300b\u7684\u7b2c2\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n
upcase<\/code> \u548c downcase<\/code> \u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u65b0\u5b57\u7b26\u4e32\uff0c\u5176\u4e2d\u5305\u542b\u539f\u59cb\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u5b57\u6bcd\u8f6c\u6362\u4e3a\u5927\u5199\u6216\u5c0f\u5199\u540e\u7684\u5185\u5bb9\u3002\u5b57\u7b26\u4e32\u4e2d\u7684\u4efb\u4f55\u975e\u5b57\u6bcd\u5b57\u7b26\u90fd\u4e0d\u4f1a\u88ab\u6539\u53d8\u3002<\/p>\n
\u8ba9\u6211\u4eec\u5c06\u5b57\u7b26\u4e32\u201cSammy Shark\u201d\u8f6c\u6362\u4e3a\u5168\u90e8\u5927\u5199\uff1a<\/p>\n
name = \"Sammy Shark\"\r\nprint name.upcase\r\n<\/code><\/pre>\n
\u8f93\u51fa<\/div>\n
SAMMY SHARK\r\n<\/code><\/pre>\n
\u73b0\u5728\uff0c\u8ba9\u6211\u4eec\u628a\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5168\u5c0f\u5199\uff1a<\/p>\n
print name.downcase\r\n<\/code><\/pre>\n
\u8f93\u51fa<\/div>\n
sammy shark\r\n<\/code><\/pre>\n
upcase<\/code> \u548c downcase<\/code> \u51fd\u6570\u901a\u8fc7\u5c06\u5b57\u7b26\u4e32\u7684\u5927\u5c0f\u5199\u7edf\u4e00\uff0c\u4f7f\u5f97\u5b57\u7b26\u4e32\u7684\u8bc4\u4f30\u548c\u6bd4\u8f83\u66f4\u52a0\u7b80\u4fbf\u3002\u4f8b\u5982\uff0c\u5982\u679c\u8981\u6c42\u7528\u6237\u8f93\u5165\u7528\u6237\u540d\uff0c\u5e76\u4e14\u7528\u6237\u8f93\u5165\u7684\u7528\u6237\u540d\u9996\u5b57\u6bcd\u5927\u5199\uff0c\u4f60\u53ef\u4ee5\u5c06\u7528\u6237\u7684\u8f93\u5165\u8f6c\u6362\u4e3a\u5c0f\u5199\u5f62\u5f0f\uff0c\u7136\u540e\u4e0e\u4e00\u4e2a\u5df2\u77e5\u7684\u5c0f\u5199\u503c\u8fdb\u884c\u6bd4\u8f83\u3002<\/p>\n
\u5728Ruby\u4e2d\uff0c\u5b57\u7b26\u4e32\u4e5f\u6709\u4e00\u4e2a capitalize<\/code> \u65b9\u6cd5\uff0c\u7528\u4e8e\u5c06\u7b2c\u4e00\u4e2a\u5b57\u7b26\u53d8\u4e3a\u5927\u5199\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\"sammy\".capitalize # \"Sammy\"\r\n<\/code><\/pre>\n
\u8fd9\u662f\u4e00\u79cd\u65b9\u4fbf\u7684\u65b9\u6cd5\uff0c\u4f46\u8981\u6ce8\u610f\u5982\u4f55\u4f7f\u7528\u5b83\uff1b\u5b83\u53ea\u5c06\u9996\u5b57\u6bcd\u8f6c\u4e3a\u5927\u5199\uff0c\u53ef\u80fd\u4e0d\u9002\u5408\u4f60\u6240\u9700\u8981\u7684\u7528\u4f8b\u3002<\/p>\n
Ruby\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a swapcase<\/code> \u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u5927\u5c0f\u5199\u4ea4\u6362\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
text = \"Sammy\"\r\nprint text.swapcase\r\n<\/code><\/pre>\n
sAMMY\r\n<\/code><\/pre>\n
\u4e0b\u9762\u5b9a\u4e49\u7684 downcase<\/code>\u3001upcase<\/code>\u3001capitalize<\/code> \u548c swapcase<\/code> \u65b9\u6cd5\u90fd\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\uff0c\u539f\u5b57\u7b26\u4e32\u4fdd\u6301\u4e0d\u53d8\u3002\u5982\u679c\u4f60\u60f3\u505a\u7684\u4e0d\u4ec5\u4ec5\u662f\u7acb\u5373\u6253\u5370\u51fa\u6587\u672c\uff0c\u8fd9\u4e00\u70b9\u975e\u5e38\u91cd\u8981\u3002\u8bf7\u770b\u4e0b\u9762\u7684\u4f8b\u5b50\u3002<\/p>\n
text = \"sammy\"\r\ntext.capitalize\r\n\r\nprint \"Hello, #{text}!\"\r\n<\/code><\/pre>\n
\u8f93\u51fa<\/div>\n
Hello, sammy!\r\n<\/code><\/pre>\n
\u5c3d\u7ba1\u6211\u4eec\u8c03\u7528\u4e86 capitalize<\/code> \u51fd\u6570\u5bf9\u6587\u672c\u53d8\u91cf\u8fdb\u884c\u5904\u7406\uff0c\u4f46\u662f\u6211\u4eec\u4ece\u6765\u6ca1\u6709\u83b7\u53d6\u5230 capitalize<\/code> \u8fd4\u56de\u7684\u503c\u3002\u6211\u4eec\u9700\u8981\u50cf\u8fd9\u6837\u91cd\u5199\u7a0b\u5e8f\uff1a<\/p>\n
text = \"sammy\"\r\ntext = text.capitalize\r\n\r\nprint \"Hello, #{text}!\"\r\n<\/code><\/pre>\n
\u8f93\u51fa<\/div>\n
Hello, Sammy!\r\n<\/code><\/pre>\n
\u4f60\u53ef\u4ee5\u4f7f\u7528 downcase!<\/code>\u3001upcase!<\/code>\u3001capitalize!<\/code> \u548c swapcase!<\/code> \u6765\u4fee\u6539\u539f\u59cb\u5b57\u7b26\u4e32\u3002<\/p>\n
text = \"sammy\"\r\ntext = text.capitalize!\r\n\r\nprint \"Hello, #{text}!\"\r\n<\/code><\/pre>\n
\u8981\u5c0f\u5fc3\uff0c\u867d\u7136\u53d8\u5f02\u539f\u59cb\u5b57\u7b26\u4e32\u6709\u5176\u4e0d\u5229\u4e4b\u5904\u3002Ruby \u63d0\u4f9b\u4e86\u4e24\u79cd\u65b9\u6cd5\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u81ea\u5df1\u7684\u9700\u8981\u9009\u62e9\u5176\u4e2d\u4e4b\u4e00\u3002<\/p>\n
\u73b0\u5728\u8ba9\u6211\u4eec\u5bf9\u5b57\u7b26\u4e32\u8fdb\u884c\u6dfb\u52a0\u548c\u5220\u9664\u7a7a\u683c\u7684\u64cd\u4f5c\u3002<\/p>\n
\u586b\u5145\u548c\u5220\u9664\u5b57\u7b26\u4e32<\/h2>\n
\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Ruby\u4e2d\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u300b\u7684\u7b2c3\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n
\u5982\u679c\u4f60\u8981\u7f16\u5199\u4e00\u4e2a\u9700\u8981\u683c\u5f0f\u5316\u6587\u672c\u7684\u7a0b\u5e8f\uff0c\u4f60\u7ecf\u5e38\u4f1a\u53d1\u73b0\u9700\u8981\u8c03\u6574\u5b57\u7b26\u4e32\u7684\u5bf9\u9f50\u65b9\u5f0f\uff0c\u4f8b\u5982\u5728\u5b57\u7b26\u4e32\u524d\u9762\u3001\u540e\u9762\u6216\u5468\u56f4\u6dfb\u52a0\u7a7a\u683c\u3002\u800c\u53e6\u4e00\u4e9b\u65f6\u5019\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u4ece\u5b57\u7b26\u4e32\u7684\u5f00\u5934\u6216\u7ed3\u5c3e\u5220\u9664\u4e0d\u5fc5\u8981\u7684\u5b57\u7b26\uff0c\u5982\u591a\u4f59\u7684\u7a7a\u683c\u6216\u7279\u6b8a\u5b57\u7b26\u3002<\/p>\n
\u4f7f\u7528 center<\/code> \u65b9\u6cd5\u5728\u5b57\u7b26\u4e32\u5468\u56f4\u6dfb\u52a0\u7a7a\u683c<\/h3>\n
center<\/code> \u65b9\u6cd5\u53ef\u4ee5\u5728\u5b57\u7b26\u4e32\u5468\u56f4\u6dfb\u52a0\u7a7a\u683c\uff0c\u4f7f\u5176\u8fbe\u5230\u6307\u5b9a\u7684\u603b\u957f\u5ea6\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>center(<\/span>21<\/span>)<\/span> # \"      Sammy      \"<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f60\u60f3\u4f7f\u7528\u4e0d\u540c\u7684\u586b\u5145\u5b57\u7b26\uff0c\u53ef\u4ee5\u5c06\u5176\u4f5c\u4e3a\u7b2c\u4e8c\u4e2a\u53c2\u6570\u6307\u5b9a\u3002<\/p>\n
\"[Sammy]\"<\/span><\/span>.<\/span>center(<\/span>21<\/span>,<\/span> \"<>\"<\/span><\/span>)<\/span> # \"<><><>[Sammy]<><><>\"<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528 ljust<\/code> \u548c rjust<\/code> \u65b9\u6cd5\u8fdb\u884c\u5de6\u5bf9\u9f50\u548c\u53f3\u5bf9\u9f50<\/h3>\n
ljust<\/code> \u548c rjust<\/code> \u65b9\u6cd5\u5206\u522b\u5728\u5b57\u7b26\u4e32\u7684\u5de6\u4fa7\u6216\u53f3\u4fa7\u6dfb\u52a0\u7a7a\u683c\u6216\u5b57\u7b26\uff0c\u5176\u5de5\u4f5c\u65b9\u5f0f\u4e0e center<\/code> \u65b9\u6cd5\u7c7b\u4f3c\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>ljust(<\/span>20<\/span>)<\/span> # \"Sammy               \"<\/span>\r\n\"Sammy\"<\/span><\/span>.<\/span>rjust(<\/span>20<\/span>)<\/span> # \"               Sammy\"<\/span>\r\n\"Sammy\"<\/span><\/span>.<\/span>rjust(<\/span>20<\/span>,<\/span> \"!\"<\/span><\/span>)<\/span> # \"!!!!!!!!!!!!!!!Sammy\"<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528 strip<\/code>\u3001lstrip<\/code> \u548c rstrip<\/code> \u65b9\u6cd5\u53bb\u9664\u7a7a\u683c<\/h3>\n
\u8981\u4ece\u5b57\u7b26\u4e32\u4e2d\u53bb\u9664\u524d\u5bfc\u7a7a\u683c\uff0c\u53ef\u4ee5\u4f7f\u7528 lstrip<\/code> \u65b9\u6cd5\u3002\u8981\u53bb\u9664\u5c3e\u968f\u7a7a\u683c\uff0c\u8bf7\u4f7f\u7528 rstrip<\/code>\u3002\u4f7f\u7528 strip<\/code> \u65b9\u6cd5\u53ef\u4ee5\u540c\u65f6\u53bb\u9664\u524d\u5bfc\u548c\u5c3e\u968f\u7a7a\u683c\u3002<\/p>\n
\" Sammy\"<\/span><\/span>.<\/span>lstrip # \"Sammy\"<\/span>\r\n\"Sammy \"<\/span><\/span>.<\/span>rstrip # \"Sammy\"<\/span>\r\n\" Sammy \"<\/span><\/span>.<\/span>strip # \"Sammy\"<\/span>\r\n<\/code><\/pre>\n
\u4f60\u53ef\u4ee5\u4f7f\u7528 center!<\/code>\u3001ljust!<\/code>\u3001rjust!<\/code>\u3001lstrip!<\/code>\u3001rstrip!<\/code> \u548c strip!<\/code> \u65b9\u6cd5\u6765\u76f4\u63a5\u4fee\u6539\u539f\u59cb\u5b57\u7b26\u4e32\uff08\u5e26\u6709\u611f\u53f9\u53f7\u7684\u65b9\u6cd5\u901a\u5e38\u8868\u793a\u4f1a\u4fee\u6539\u539f\u5bf9\u8c61\uff09\u3002<\/p>\n
\u4f7f\u7528 chop<\/code> \u65b9\u6cd5\u5220\u9664\u5b57\u7b26\u4e32\u672b\u5c3e\u5b57\u7b26<\/h3>\n
\u6709\u65f6\u5019\u4f60\u9700\u8981\u4ece\u4e00\u4e2a\u5b57\u7b26\u4e32\u7684\u7ed3\u5c3e\u5220\u9664\u4e00\u4e9b\u5b57\u7b26\u3002Ruby \u7684 chop<\/code> \u65b9\u6cd5\u5c31\u662f\u505a\u8fd9\u4e2a\u7684\uff1b\u5b83\u4f1a\u4ece\u5b57\u7b26\u4e32\u4e2d\u5220\u9664\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>chop # \"Samm\"<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u5bf9\u4e8e\u4ece\u5b57\u7b26\u4e32\u4e2d\u5220\u9664\u6362\u884c\u7b26\uff08\\n<\/code>\uff09\u7279\u522b\u6709\u7528\u3002<\/p>\n
\"This string has a newline\\n\"<\/span><\/span>.<\/span>chop # \"This string has a newline\"<\/span>\r\n<\/code><\/pre>\n
chop<\/code> \u65b9\u6cd5\u4e0d\u6539\u53d8\u539f\u59cb\u5b57\u7b26\u4e32\uff0c\u800c\u662f\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684\u5b57\u7b26\u4e32\u3002chop!<\/code> \u65b9\u6cd5\u5219\u76f4\u63a5\u4fee\u6539\u73b0\u6709\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n
\u4f7f\u7528 chomp<\/code> \u65b9\u6cd5\u5220\u9664\u5b57\u7b26\u4e32\u672b\u5c3e\u7684\u6307\u5b9a\u5b57\u7b26\u6216\u6362\u884c\u7b26<\/h3>\n
chomp<\/code> \u65b9\u6cd5\u53ef\u4ee5\u4ece\u5b57\u7b26\u4e32\u7684\u672b\u5c3e\u5220\u9664\u6307\u5b9a\u7684\u5b57\u7b26\u5e8f\u5217\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>chomp(<\/span>\"my\"<\/span><\/span>)<\/span> # \"Sam\"<\/span>\r\n<\/code><\/pre>\n
\u5982\u679c\u4f60\u6ca1\u6709\u6307\u5b9a\u8981\u5220\u9664\u7684\u5b57\u7b26\u4e32\uff0cchomp<\/code> \u51fd\u6570\u5c06\u4f1a\u5220\u9664\u5b57\u7b26\u4e32\u672b\u5c3e\u7684\u6362\u884c\u7b26\uff08\\n<\/code>\u3001\\r<\/code> \u6216 \\r\\n<\/code>\uff09\u3002<\/p>\n
\"This string has a newline\\n\"<\/span><\/span>.<\/span>chomp # \"This string has a newline\"<\/span>\r\n<\/code><\/pre>\n
\u7136\u800c\uff0c\u5982\u679c\u5b57\u7b26\u4e32\u4e2d\u4e0d\u5305\u542b\u6362\u884c\u7b26\uff0cchomp<\/code> \u53ea\u4f1a\u8fd4\u56de\u539f\u59cb\u5b57\u7b26\u4e32\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>chomp # \"Sammy\"<\/span>\r\n<\/code><\/pre>\n
\u8fd9\u4f7f\u5f97\u4f7f\u7528 chomp<\/code> \u65b9\u6cd5\u6bd4 chop<\/code> \u65b9\u6cd5\u66f4\u5b89\u5168\uff0c\u56e0\u4e3a\u5b83\u4ec5\u5728\u5b58\u5728\u6362\u884c\u7b26\u65f6\u624d\u79fb\u9664\u5b83\u4eec\uff0c\u800c chop<\/code> \u603b\u662f\u79fb\u9664\u6700\u540e\u4e00\u4e2a\u5b57\u7b26\u3002<\/p>\n
chomp!<\/code> \u65b9\u6cd5\u7684\u884c\u4e3a<\/h3>\n
Ruby \u6709\u4e00\u4e2a chomp!<\/code> \u65b9\u6cd5\uff0c\u5b83\u4f1a\u6539\u53d8\u539f\u59cb\u5b57\u7b26\u4e32\u5e76\u8fd4\u56de\u4fee\u6539\u540e\u7684\u5b57\u7b26\u4e32\uff08\u5982\u679c\u8fdb\u884c\u4e86\u66ff\u6362\uff09\u3002\u7136\u800c\uff0c\u4e0e chomp<\/code> \u4e0d\u540c\u7684\u662f\uff0c\u5982\u679c chomp!<\/code> \u65b9\u6cd5\u6ca1\u6709\u6539\u53d8\u5b57\u7b26\u4e32\uff0c\u5b83\u4f1a\u8fd4\u56de nil<\/code>\u3002<\/p>\n
string =<\/span> \"Hello\\n\"<\/span><\/span>\r\nstring.<\/span>chomp!<\/span> # \"Hello\"<\/span>\r\n\r\nstring =<\/span> \"Hello\"<\/span><\/span>\r\nstring.<\/span>chomp!<\/span> # nil<\/span>\r\n<\/code><\/pre>\n
\u63a5\u4e0b\u6765\uff0c\u8ba9\u6211\u4eec\u6765\u770b\u770b\u5982\u4f55\u5728\u5b57\u7b26\u4e32\u4e2d\u641c\u7d22\u6587\u672c\u3002<\/p>\n
\u5bfb\u627e\u5b57\u7b26\u548c\u6587\u672c<\/h2>\n
\u5728Ruby\u4e2d\u67e5\u627e\u5b57\u7b26\u4e32\uff1a`include?`\u3001`index`\u3001`start_with?`\u548c`end_with?`\u65b9\u6cd5\u8be6\u89e3<\/h2>\n
\u8fd9\u662f\u6587\u7ae0\u300a\u5982\u4f55\u5728Ruby\u4e2d\u4f7f\u7528\u5b57\u7b26\u4e32\u65b9\u6cd5\u300b\u7684\u7b2c4\u90e8\u5206\uff08\u51716\u90e8\u5206\uff09\u3002<\/p>\n
\u5728Ruby\u4e2d\u5904\u7406\u5b57\u7b26\u4e32\u65f6\uff0c\u7ecf\u5e38\u9700\u8981\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u5305\u542b\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u6216\u8005\u67e5\u627e\u7279\u5b9a\u5b57\u7b26\/\u5b50\u5b57\u7b26\u4e32\u7684\u4f4d\u7f6e\u3002\u672c\u8282\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u51e0\u4e2a\u5e38\u7528\u7684\u5b57\u7b26\u4e32\u67e5\u627e\u65b9\u6cd5\uff1ainclude?<\/code>\u3001index<\/code>\u3001start_with?<\/code>\u548cend_with?<\/code>\u3002<\/p>\n
\u4f7f\u7528 `include?` \u65b9\u6cd5\u68c0\u67e5\u5b57\u7b26\u4e32\u5305\u542b\u6027<\/h3>\n
include?<\/code> \u65b9\u6cd5\u7528\u4e8e\u68c0\u67e5\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u5305\u542b\u53e6\u4e00\u4e2a\u5b57\u7b26\u4e32\u3002\u5982\u679c\u76ee\u6807\u5b57\u7b26\u4e32\u5b58\u5728\uff0c\u5219\u8fd4\u56de true<\/code>\uff0c\u5426\u5219\u8fd4\u56de false<\/code>\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>include<\/span>?<\/span>(<\/span>\"a\"<\/span><\/span>)<\/span> # true<\/span>\r\n\"Sammy\"<\/span><\/span>.<\/span>include<\/span>?<\/span>(<\/span>\"b\"<\/span><\/span>)<\/span> # false<\/span>\r\n<\/code><\/pre>\n
\u4f7f\u7528 `index` \u65b9\u6cd5\u67e5\u627e\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u7684\u9996\u6b21\u51fa\u73b0\u4f4d\u7f6e<\/h3>\n
index<\/code> \u65b9\u6cd5\u8fd4\u56de\u6307\u5b9a\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u9996\u6b21\u51fa\u73b0\u7684\u8d77\u59cb\u7d22\u5f15\u3002\u5982\u679c\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u4e0d\u5b58\u5728\uff0c\u5219\u8fd4\u56de nil<\/code>\u3002<\/p>\n
\"Sammy\"<\/span><\/span>.<\/span>index(<\/span>\"a\"<\/span><\/span>)<\/span> # 1<\/span>\r\n\"Sammy\"<\/span><\/span>.<\/span>index(<\/span>\"mm\"<\/span><\/span>)<\/span> # 2<\/span>\r\n\"Sammy\"<\/span><\/span>.<\/span>index(<\/span>\"Fish\"<\/span><\/span>)<\/span> # nil<\/span>\r\n<\/code><\/pre>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cindex<\/code> \u65b9\u6cd5\u53ea\u80fd\u627e\u5230\u5b57\u7b26\u6216\u5b50\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u6b21\u51fa\u73b0\u3002\u4f8b\u5982\uff1a<\/p>\n
text =<\/span> \"Sammy has a balloon\"<\/span><\/span>\r\ntext.<\/span>index(<\/span>\"a\"<\/span><\/span>)<\/span> # 1<\/span>\r\n<\/code><\/pre>\n
\u5728\u5b57\u7b26\u4e32\u201cSammy has a balloon\u201d\u4e2d\uff0c\u5b57\u6bcd\u201ca\u201d\u51fa\u73b0\u4e86\u56db\u6b21\u3002\u4f46 index<\/code> \u65b9\u6cd5\u53ea\u8fd4\u56de\u4e86\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4f4d\u7f6e\uff08\u7d22\u5f15\u4e3a1\uff09\u3002<\/p>\n
\u67e5\u627e\u6240\u6709\u51fa\u73b0\u4f4d\u7f6e\u7684\u8fdb\u9636\u65b9\u6cd5<\/h4>\n
\u5982\u679c\u9700\u8981\u67e5\u627e\u6240\u6709\u51fa\u73b0\u7684\u4f4d\u7f6e\uff0c\u53ef\u4ee5\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u4e3a\u5b57\u7b26\u6570\u7ec4\uff0c\u5e76\u7ed3\u5408\u6570\u7ec4\u65b9\u6cd5\u8fdb\u884c\u904d\u5386\u548c\u7b5b\u9009\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u5b9e\u73b0\u793a\u4f8b\uff1a<\/p>\n
text =<\/span> \"Sammy has a balloon\"<\/span><\/span>\r\nindices =<\/span> text.<\/span>chars\r\n.<\/span>each_with_index\r\n.<\/span>select{<\/span>|<\/span>char,<\/span> index|<\/span> char ==<\/span> \"a\"<\/span><\/span> }<\/span>\r\n.<\/span>map{<\/span>|<\/span>pair|<\/span> pair.<\/span>last}<\/span>\r\n\r\nprint indices\r\n<\/code><\/pre>\n
[1, 7, 10, 13]\r\n<\/code><\/pre>\n
\u4e0a\u8ff0\u4ee3\u7801\u7684\u89e3\u91ca\uff1a<\/p>\n