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- exercise-loops-and-functions.go<\/ul>\n<\/li>\n<\/ul>\n
https:\/\/play.golang.org\/p\/tS2F5Fsf_2<\/p>\n
\u672c\u5f53\u306fEPS(\u8a08\u7b97\u6a5f\u30a4\u30d7\u30b7\u30ed\u30f3)\u3067\u3084\u308b\u3079\u304d\u306a\u306e\u304b\u3082\uff1f
\nhttps:\/\/play.golang.org\/p\/XOXwIdNfsa<\/p>\nmath.Sqrt()\u3092\u4f7f\u308f\u306a\u3044\u3060\u3051\u3067math\u30d1\u30c3\u30b1\u30fc\u30b8\u306f\u4f7f\u3063\u3061\u3083\u3063\u3066\u308b(\u672c\u8cea\u3068\u306f\u95a2\u4fc2\u306a\u3044\u304b\u3089\u826f\u3044\u304b\u306a\u3063\u3066)<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n \"fmt\"<\/span>\r\n \"math\"<\/span>\r\n)<\/span>\r\n\r\n\/\/ DELTA ...<\/span>\r\nconst<\/span> DELTA<\/span> =<\/span> 1e-10<\/span>\r\n\r\n\/\/ Sqrt is Square root using Newton's law<\/span>\r\nfunc<\/span> Sqrt<\/span>(<\/span>x<\/span> float64<\/span>)<\/span> float64<\/span> {<\/span>\r\n zn0<\/span>,<\/span> zn1<\/span> :=<\/span> float64<\/span>(<\/span>0<\/span>),<\/span> float64<\/span>(<\/span>1<\/span>)<\/span>\r\n for<\/span> math<\/span>.<\/span>Abs<\/span>(<\/span>zn1<\/span>-<\/span>zn0<\/span>)<\/span> ><\/span> DELTA<\/span> {<\/span>\r\n zn0<\/span>,<\/span> zn1<\/span> =<\/span> zn1<\/span>,<\/span> zn1<\/span>-<\/span>((<\/span>math<\/span>.<\/span>Pow<\/span>(<\/span>zn1<\/span>,<\/span> 2<\/span>)<\/span>-<\/span>x<\/span>)<\/span>\/<\/span>(<\/span>2<\/span>*<\/span>zn1<\/span>))<\/span>\r\n }<\/span>\r\n return<\/span> zn1<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n fmt<\/span>.<\/span>Println<\/span>(<\/span>Sqrt<\/span>(<\/span>2<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n\u8fd0\u52a8\uff1a\u5207\u7247<\/h2>\n
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- exercise-slices.go<\/ul>\n<\/li>\n<\/ul>\n
<\/p>\n
- https:\/\/play.golang.org\/p\/oR5GyfbMrJ<\/ul>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> \"golang.org\/x\/tour\/pic\"<\/span>\r\n\r\n\/\/ Pic https:\/\/go-tour-jp.appspot.com\/moretypes\/18<\/span>\r\nfunc<\/span> Pic<\/span>(<\/span>dx<\/span>,<\/span> dy<\/span> int<\/span>)<\/span> [][]<\/span>uint8<\/span> {<\/span>\r\n data<\/span> :=<\/span> make<\/span>([][]<\/span>uint8<\/span>,<\/span> dy<\/span>)<\/span>\r\n for<\/span> y<\/span> :=<\/span> range<\/span> data<\/span> {<\/span>\r\n data<\/span>[<\/span>y<\/span>]<\/span> =<\/span> make<\/span>([]<\/span>uint8<\/span>,<\/span> dx<\/span>)<\/span>\r\n for<\/span> x<\/span> :=<\/span> range<\/span> data<\/span>[<\/span>y<\/span>]<\/span> {<\/span>\r\n data<\/span>[<\/span>y<\/span>][<\/span>x<\/span>]<\/span> =<\/span> uint8<\/span>((<\/span>x<\/span> +<\/span> y<\/span>)<\/span> \/<\/span> 2<\/span>)<\/span>\r\n }<\/span>\r\n }<\/span>\r\n return<\/span> data<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n pic<\/span>.<\/span>Show<\/span>(<\/span>Pic<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n- \n
- \n
- \u3061\u306a\u307f\u306b\u753b\u50cf\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3059\u308c\u3070<\/ul>\n<\/li>\n<\/ul>\n
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- \u306b\u5909\u63db\u3067\u304d\u305f<\/ul>\n<\/li>\n<\/ul>\n
base64\u30a8\u30f3\u30b3\u30fc\u30c9\u3055\u308c\u3066\u308b\u3060\u3051
\n\u53c2\u7167: http:\/\/d.hatena.ne.jp\/moogme\/20090814\/p3<\/p>\n$<\/span> go run exercise-slices.go | sed<\/span> -e<\/span> 's\/IMAGE:\\(.*\\)\/<img src=\"data:image\\\/png;base64,\\1\">\/g'<\/span>\r\n<img src=\"data:image\/png;<\/span>base64<\/span>,iVBORw0KGgo.....ggg==<\/span>\">\r\n<\/span><\/code><\/pre>\n\u8fd0\u52a8\uff1a\u5730\u56fe<\/h2>\n
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- \n
- exercise-maps.go<\/ul>\n<\/li>\n<\/ul>\n
https:\/\/play.golang.org\/p\/6mCsDYvIra<\/p>\n
strings.Fields() \u306f\u307e\u3055\u306b\u5358\u8a9e\u533a\u5207\u308a\u306b\u3057\u3066\u304f\u308c\u308b\u95a2\u6570<\/p>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n \"strings\"<\/span>\r\n\r\n \"golang.org\/x\/tour\/wc\"<\/span>\r\n)<\/span>\r\n\r\n\/\/ WordCount https:\/\/go-tour-jp.appspot.com\/moretypes\/23<\/span>\r\nfunc<\/span> WordCount<\/span>(<\/span>s<\/span> string<\/span>)<\/span> map<\/span>[<\/span>string<\/span>]<\/span>int<\/span> {<\/span>\r\n result<\/span> :=<\/span> map<\/span>[<\/span>string<\/span>]<\/span>int<\/span>{}<\/span>\r\n for<\/span> _<\/span>,<\/span> word<\/span> :=<\/span> range<\/span> strings<\/span>.<\/span>Fields<\/span>(<\/span>s<\/span>)<\/span> {<\/span>\r\n result<\/span>[<\/span>word<\/span>]<\/span>++<\/span>\r\n }<\/span>\r\n return<\/span> result<\/span>\r\n}<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n
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<\/p>\n
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