\n| map.get(key)<\/td>\n | \u5b89\u9759\u5730\u8fd4\u56de None<\/td>\n | ?V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \u4e00\u53e5\u8bdd：\u65b9\u62ec\u53f7\u662f"\u5feb\u901a\u9053"，\u786e\u4fe1\u4e0b\u6807\/\u952e\u5b58\u5728\u65f6\u7528；get \u662f"\u5b89\u5168\u901a\u9053"，\u62ff\u4e0d\u51c6\u65f6\u7528\u3002<\/p>\n 6.1 \u4e00\u4e2a\u610f\u5916\u53d1\u73b0：\u7f16\u8bd1\u5668\u4f1a\u66ff\u4f60\u67e5\u8d8a\u754c<\/h4>\n\u5199\u4ee3\u7801\u65f6\u4f60\u53ef\u80fd\u4f1a\u649e\u5230\u8fd9\u4e2a\u62a5\u9519：<\/p>\n error: array index is out of bounds<\/p>\n \u4ed3\u9889\u4f1a\u5bf9\u7f16\u8bd1\u671f\u5c31\u80fd\u7b97\u51fa\u7684\u5e38\u91cf\u4e0b\u6807\u505a\u68c0\u67e5：let arr = [1,2,3]; arr.get(9) \u751a\u81f3 arr[9]，\u7f16\u8bd1\u5668\u4e00\u773c\u770b\u51fa\u8d8a\u754c，\u76f4\u63a5\u62d2\u7edd\u7f16\u8bd1\u3002\u4e0b\u6807\u6765\u81ea\u5faa\u73af\u53d8\u91cf\u3001\u51fd\u6570\u53c2\u6570\u7b49"\u8fd0\u884c\u65f6\u624d\u77e5\u9053"\u7684\u503c\u65f6，\u624d\u7559\u5230\u8fd0\u884c\u671f\u5904\u7406\u3002\u8fd9\u662f\u52a0\u5206\u9879，\u4f46\u7b2c\u4e00\u6b21\u89c1\u4f1a\u61f5\u2014\u2014\u8bb0\u4f4f\u5b83\u4e0d\u662f bug\u3002<\/p>\n 6.2 \u81ea\u5df1\u8bbe\u8ba1\u51fd\u6570：\u628a"\u53ef\u80fd\u5931\u8d25"\u5199\u8fdb\u8fd4\u56de\u7c7b\u578b<\/h4>\n\u6700\u5b9e\u7528\u7684\u4e60\u60ef：\u51e1\u662f\u7ed3\u679c\u53ef\u80fd\u6ca1\u6709\u7684\u51fd\u6570，\u8ba9\u5b83\u8fd4\u56de ?T，\u8c03\u7528\u65b9\u5c31\u88ab\u8feb\u9762\u5bf9\u5931\u8d25，\u800c\u4e0d\u662f\u63a5\u5230\u4e00\u4e2a\u6084\u6084\u7206\u70b8\u7684 null\u3002\u6bd4\u5982\u9664\u96f6：<\/p>\n func safeDiv(a: Float64, b: Float64): ?Float64 {
\n if (b == 0.0) {
\n return None
\n }
\n return Some(a \/ b)
\n}<\/p>\n \u8c03\u7528\u65b9\u60f3\u70b8\u90fd\u96be：safeDiv(10, 0) \u62ff\u5230\u7684\u662f None，\u914d\u5408 ?? \u6216 match \u5c31\u80fd\u4f18\u96c5\u515c\u5e95\u3002<\/p>\n
\n\u4e03\u3001CIDE \u5b9e\u64cd：\u6210\u7ee9\u67e5\u8be2 + \u5b66\u751f\u6635\u79f0（\u7efc\u5408\u5b9e\u6218）<\/h3>\n7.1 \u7f16\u5199\u7a0b\u5e8f<\/h4>\n\u65b0\u5efa\u5de5\u7a0b（\u6216\u5355\u6587\u4ef6），\u8f93\u5165\u4e0b\u9762\u7684\u7a0b\u5e8f\u3002\u5b83\u628a\u672c\u8282\u8bfe\u5168\u90e8\u8981\u7d20\u4e32\u4e86\u8d77\u6765：\u5b89\u5168\u9664\u6cd5\u3001HashMap \u67e5\u8be2\u3001match \u89e3\u6784\u3001map + ?? \u4e00\u884c\u6d41\u3001\u5d4c\u5957 Option \u4e0e flatMap\u3001get \u8d8a\u754c\u4e0e\u65b9\u62ec\u53f7\u8d8a\u754c\u5bf9\u7167\u3002<\/p>\n import std.collection.*<\/p>\n \/\/ \u5b89\u5168\u9664\u6cd5：\u9664\u6570\u4e3a 0 \u65f6\u8fd4\u56de None，\u800c\u4e0d\u662f\u5d29\u6e83
\nfunc safeDiv(a: Float64, b: Float64): ?Float64 {
\n if (b == 0.0) {
\n return None
\n }
\n return Some(a \/ b)
\n}<\/p>\n class Student {
\n let name: String
\n let nickname: ?String \/\/ \u6635\u79f0\u53ef\u4ee5\u6ca1\u6709
\n init(name: String, nickname: ?String) {
\n this.name = name
\n this.nickname = nickname
\n }
\n}<\/p>\n \/\/ \u6309\u59d3\u540d\u67e5\u5b66\u751f：\u53ef\u80fd\u67e5\u4e0d\u5230
\nfunc findStudent(list: ArrayList<Student>, target: String): ?Student {
\n for (s in list) {
\n if (s.name == target) {
\n return Some(s)
\n }
\n }
\n return None
\n}<\/p>\n \/\/ \u5206\u6570\u8bc4\u7ea7（\u62ff\u5230\u7684\u4e00\u5b9a\u662f\u771f\u5b9e\u5206\u6570）
\nfunc gradeOf(score: Int64): String {
\n if (score >= 90) {
\n return "\u4f18\u79c0"
\n } else if (score >= 60) {
\n return "\u53ca\u683c"
\n } else {
\n return "\u4e0d\u53ca\u683c"
\n }
\n}<\/p>\n main(): Int64 {
\n println("—— \u2460 \u5b89\u5168\u9664\u6cd5 ——")
\n let r1 = safeDiv(10.0, 2.0)
\n let r2 = safeDiv(10.0, 0.0)
\n println("10 \/ 2 = ${r1}")
\n println("10 \/ 0 = ${r2}")
\n println("\u5e73\u5747\u503c = ${r2 ?? 0.0}")<\/p>\n println("—— \u2461 \u6210\u7ee9\u67e5\u8be2（\u7f3a\u8003\u7684\u4eba\u4e0d\u5728\u8868\u91cc）——")
\n let scores = HashMap<String, Int64>()
\n scores.add("\u5f20\u4e09", 92)
\n scores.add("\u674e\u56db", 58)
\n for (name in ["\u5f20\u4e09", "\u674e\u56db", "\u738b\u4e94"]) {
\n let score = scores.get(name)
\n match (score) {
\n case Some(s) => println("${name}：${s} \u5206，${gradeOf(s)}")
\n case None => println("${name}：\u7f3a\u8003")
\n }
\n }<\/p>\n println("—— \u2462 \u4e00\u884c\u6d41：map \u53d8\u6362 + ?? \u515c\u5e95 ——")
\n for (name in ["\u5f20\u4e09", "\u674e\u56db", "\u738b\u4e94"]) {
\n let g = scores.get(name).map({ s => gradeOf(s) })
\n println("${name}：${g ?? "\u7f3a\u8003"}")
\n }<\/p>\n println("—— \u2463 \u5b66\u751f\u6635\u79f0（\u5d4c\u5957 Option \u4e0e flatMap）——")
\n let students = ArrayList<Student>([
\n Student("\u5f20\u4e09", Some("\u5c0f\u4e09\u5b50")),
\n Student("\u674e\u56db", None)
\n ])
\n for (name in ["\u5f20\u4e09", "\u674e\u56db", "\u738b\u4e94"]) {
\n let nick = findStudent(students, name).flatMap({ s => s.nickname })
\n println("${name} \u7684\u6635\u79f0：${nick ?? "（\u6ca1\u6709\u6635\u79f0）"}")
\n }<\/p>\n println("—— \u2464 \u8d8a\u754c\u8bbf\u95ee：get \u8fd4\u56de None，[] \u76f4\u63a5\u629b\u5f02\u5e38 ——")
\n let data = [10, 20, 30]
\n for (i in 0..data.size + 1) {
\n match (data.get(i)) {
\n case Some(v) => println("\u7b2c ${i} \u4e2a：${v}")
\n case None => println("\u7b2c ${i} \u4e2a：\u4e0d\u5b58\u5728（\u4f46\u7a0b\u5e8f\u8fd8\u6d3b\u7740）")
\n }
\n }
\n \/\/ \u5bf9\u7167：\u65b9\u62ec\u53f7\u4e0b\u6807\u8d8a\u754c\u4f1a\u629b\u5f02\u5e38（\u5305\u5728 try \u91cc\u7a0b\u5e8f\u624d\u4e0d\u4f1a\u9000\u51fa）
\n try {
\n println("${atIndex(data, 3)}")
\n } catch (e: IndexOutOfBoundsException) {
\n println("\u65b9\u62ec\u53f7\u8d8a\u754c\u88ab\u6355\u83b7：${e}")
\n }
\n return 0
\n}<\/p>\n \/\/ \u4e0b\u6807\u5305\u8fdb\u51fd\u6570，\u9694\u7edd\u7f16\u8bd1\u5668\u5bf9\u5b57\u9762\u91cf\u4e0b\u6807\u7684\u7f16\u8bd1\u671f\u68c0\u67e5
\nfunc atIndex(a: Array<Int64>, i: Int64): Int64 {
\n return a[i]
\n}<\/p>\n 💡 \u5c0f\u63d0\u793a：Lambda \u91cc\u5982\u679c\u7528 if \u8868\u8fbe\u5f0f\u4e14\u5199\u5728\u540c\u4e00\u884c，\u4e24\u4e2a\u5206\u652f\u4f53\u90fd\u8981\u5e26\u82b1\u62ec\u53f7：{ s => if (s >= 60) { "\u53ca\u683c" } else { "\u4e0d\u53ca\u683c" } }，\u5426\u5219\u4f1a\u62a5 expected '{'\u3002<\/p>\n 7.2 \u8fd0\u884c\u4e0e\u9a8c\u8bc1<\/h4>\n\u5728 CIDE \u4e2d\u70b9\u8fd0\u884c（\u6216 cjpm run），\u5e94\u5f97\u5230\u4e0b\u9762\u7684\u8f93\u51fa（\u5df2\u9010\u5b57\u6838\u5bf9）：<\/p>\n —— \u2460 \u5b89\u5168\u9664\u6cd5 ——
\n10 \/ 2 = Some(5.000000)
\n10 \/ 0 = None
\n\u5e73\u5747\u503c = 0.000000
\n—— \u2461 \u6210\u7ee9\u67e5\u8be2（\u7f3a\u8003\u7684\u4eba\u4e0d\u5728\u8868\u91cc）——
\n\u5f20\u4e09：92 \u5206，\u4f18\u79c0
\n\u674e\u56db：58 \u5206，\u4e0d\u53ca\u683c
\n\u738b\u4e94：\u7f3a\u8003
\n—— \u2462 \u4e00\u884c\u6d41：map \u53d8\u6362 + ?? \u515c\u5e95 ——
\n\u5f20\u4e09：\u4f18\u79c0
\n\u674e\u56db：\u4e0d\u53ca\u683c
\n\u738b\u4e94：\u7f3a\u8003
\n—— \u2463 \u5b66\u751f\u6635\u79f0（\u5d4c\u5957 Option \u4e0e flatMap）——
\n\u5f20\u4e09 \u7684\u6635\u79f0：\u5c0f\u4e09\u5b50
\n\u674e\u56db \u7684\u6635\u79f0：（\u6ca1\u6709\u6635\u79f0）
\n\u738b\u4e94 \u7684\u6635\u79f0：（\u6ca1\u6709\u6635\u79f0）
\n—— \u2464 \u8d8a\u754c\u8bbf\u95ee：get \u8fd4\u56de None，[] \u76f4\u63a5\u629b\u5f02\u5e38 ——
\n\u7b2c 0 \u4e2a：10
\n\u7b2c 1 \u4e2a：20
\n\u7b2c 2 \u4e2a：30
\n\u7b2c 3 \u4e2a：\u4e0d\u5b58\u5728（\u4f46\u7a0b\u5e8f\u8fd8\u6d3b\u7740）
\n\u65b9\u62ec\u53f7\u8d8a\u754c\u88ab\u6355\u83b7：IndexOutOfBoundsException: The length of the array is 3, but the index is 3.<\/p>\n \u53ef\u4ee5\u81ea\u5df1\u52a8\u624b\u6539：<\/p>\n \n- \u628a \u2460 \u7684 r2 ?? 0.0 \u6539\u6210\u76f4\u63a5\u63d2\u503c\u6253\u5370 r2，\u4f53\u4f1a"\u9ed8\u8ba4\u503c"\u548c"\u76d2\u5b50"\u7684\u663e\u793a\u5dee\u522b；<\/li>\n
- \u5728 \u2461 \u91cc\u628a match \u8bef\u5220 case None \u5206\u652f，\u7f16\u8bd1\u5668\u4f1a\u7acb\u523b\u62a5\u9519\u2014\u2014\u4eb2\u773c\u770b\u770b Option \u662f\u600e\u4e48"\u903c\u7740"\u4f60\u5904\u7406\u7f3a\u8003\u7684；<\/li>\n
- \u628a \u2463 \u7684 flatMap \u6362\u6210 ?.，\u89c2\u5bdf\u8f93\u51fa\u5982\u4f55\u9000\u5316\u6210 Some(Some(…)) \/ Some(None)；<\/li>\n
- \u7ed9 scores \u518d\u52a0\u4e00\u4e2a"\u8d75\u516d"35 \u5206，\u786e\u8ba4 \u2462 \u7684\u4e00\u884c\u6d41\u65e0\u9700\u4efb\u4f55\u4fee\u6539\u5c31\u6b63\u786e\u8f93\u51fa\u8bc4\u7ea7\u3002<\/li>\n<\/ul>\n
7.3 \u7528\u8c03\u8bd5\u5668\u770b\u6e05 Some \u76d2\u5b50<\/h4>\nOption \u5728 CIDE \u8c03\u8bd5\u5668\u91cc\u662f\u900f\u660e\u7684：<\/p>\n - \u5728 \u2461 \u7684 match (score) \u4e00\u884c\u6253\u65ad\u70b9，Shift + F9 \u542f\u52a8\u8c03\u8bd5；<\/li>\n
- Variables \u9762\u677f\u91cc score \u76f4\u63a5\u663e\u793a\u4e3a Some(92)；\u5faa\u73af\u5230\u738b\u4e94\u65f6\u53d8\u6210 None，\u4e0b\u65b9\u884c\u5185\u503c\u4e5f\u540c\u6b65\u53d8\u5316；<\/li>\n
- \u5355\u6b65（F8）\u8fdb\u5165 case Some(s) \u5206\u652f\u65f6，\u80fd\u770b\u5230\u65b0\u53d8\u91cf s = 92\u2014\u2014\u8fd9\u5c31\u662f match \u5e2e\u4f60\u62c6\u597d\u7684\u76d2\u5b50；<\/li>\n
- \u5728 \u2463 \u65ad\u4f4f，\u5206\u522b\u5bf9\u6bd4 ?. \u5199\u6cd5（\u5d4c\u5957\u4e24\u5c42）\u4e0e flatMap \u5199\u6cd5（\u53ea\u6709\u4e00\u5c42）\u5728\u53d8\u91cf\u9762\u677f\u4e2d\u7684\u7ed3\u6784\u5dee\u5f02\u3002<\/li>\n
\u8c03\u8bd5\u7ed3\u675f\u70b9\u505c\u6b62\u6309\u94ae\u3002<\/p>\n
\n\u516b\u3001\u5e38\u89c1\u95ee\u9898 FAQ<\/h3>\nQ1：\u7f51\u4e0a\u6559\u7a0b\u5199\u7684 getOrElse(0)\u3001orElse { } \u4e3a\u4ec0\u4e48\u62a5 \u201cnot a member of enum \u2018Option\u2019\u201d？ SDK 1.1.3 \u7684 Option \u6ca1\u6709\u8fd9\u4e9b\u65b9\u6cd5\u3002\u8981\u9ed8\u8ba4\u503c\u4e00\u5f8b\u7528 ??；\u8981\u6309\u60c5\u51b5\u5904\u7406\u7528 match；\u8981\u53d8\u6362\u7528 map；\u8981\u94fe\u5f0f\u62cd\u5e73\u7528 flatMap\u3002\u672c\u6587\u6240\u6709\u5199\u6cd5\u5747\u6309 1.1.3 \u5b9e\u6d4b\u3002<\/p>\n Q2：\u7a7a\u5408\u5e76\u8fd0\u7b97\u7b26\u5230\u5e95\u662f ?: \u8fd8\u662f ??？ ??（\u4e24\u4e2a\u95ee\u53f7）\u3002\u4ed3\u9889\u6ca1\u6709 ?: \u5199\u6cd5，\u5199\u4e86\u4f1a\u62a5 expected expression after '?'\u3002<\/p>\n Q3：\u5b89\u5168\u4e0b\u6807 arr?[9] \u5b58\u5728\u5417？ 1.1.3 \u4e0d\u652f\u6301，\u5199\u4e86\u62a5 cannot use optional chaining\u3002\u8981\u5b89\u5168\u8bbf\u95ee\u4e0b\u6807\u7edf\u4e00\u7528 arr.get(i)（\u8d8a\u754c\u8fd4\u56de None）\u3002<\/p>\n Q4：\u4e3a\u4ec0\u4e48 x.field \u6253\u5370\u51fa Some(Some(…)) \u8fd9\u79cd\u53cc\u5c42\u76d2\u5b50？ \u56e0\u4e3a x \u672c\u8eab\u662f Option\u3001field \u53c8\u6070\u597d\u662f\u53ef\u7a7a\u7c7b\u578b，?. \u53ea\u8d1f\u8d23\u8df3\u8fc7\u7b2c\u4e00\u5c42 None，\u4e0d\u4f1a\u81ea\u52a8\u62cd\u5e73\u3002\u7528 flatMap \u628a\u4e24\u5c42\u5408\u6210\u4e00\u5c42（\u89c1 4.1\u30015.3）\u3002<\/p>\n Q5：\u660e\u660e if (o.isSome()) \u5224\u65ad\u8fc7\u4e86，\u4e3a\u4ec0\u4e48\u5206\u652f\u91cc\u7528 o \u8fd8\u62a5\u7c7b\u578b\u9519\u8bef？ \u4ed3\u9889\u4e0d\u505a"\u667a\u80fd\u8f6c\u6362"，\u5224\u65ad\u4e0d\u4f1a\u6539\u53d8\u53d8\u91cf\u7684\u9759\u6001\u7c7b\u578b\u3002\u5206\u652f\u91cc\u7528 o.getOrThrow() \u663e\u5f0f\u53d6\u503c\u3002\u628a\u53ef\u7a7a\u503c\u76f4\u63a5\u4f20\u7ed9\u8981\u6c42\u975e\u7a7a\u7684\u51fd\u6570，\u4e5f\u4f1a\u5f97\u5230 mismatched types\u3002<\/p>\n Q6：None.getOrThrow() \u4f1a\u600e\u6837？ \u629b NoneValueException（\u5bf9\u8c61\u672c\u8eab\u6253\u5370\u4e3a NoneValueException，\u65e0\u989d\u5916\u63cf\u8ff0\u6587\u672c）\u3002\u7b2c 8 \u8bfe\u7528\u65b9\u62ec\u53f7\u8bfb\u4e0d\u5b58\u5728\u7684 HashMap \u952e\u89c1\u5230\u7684 Value does not exist! \u540c\u6e90\u3002\u6b63\u5e38\u4ee3\u7801\u91cc\u5e94\u5148\u7528 isSome() \/ match \/ ?? \u89c4\u907f，\u800c\u4e0d\u662f\u4f9d\u8d56 catch\u3002<\/p>\n Q7：arr.get(9) \u4e3a\u4ec0\u4e48\u7f16\u8bd1\u9636\u6bb5\u5c31\u62a5 \u201carray index is out of bounds\u201d？ \u7f16\u8bd1\u5668\u80fd\u5bf9\u5b57\u9762\u91cf\u6570\u7ec4 + \u5e38\u91cf\u4e0b\u6807\u505a\u7f16\u8bd1\u671f\u6c42\u503c\u5e76\u62e6\u622a\u3002\u4e0b\u6807\u6765\u81ea\u5faa\u73af\u53d8\u91cf\u6216\u51fd\u6570\u53c2\u6570\u65f6\u624d\u7559\u5230\u8fd0\u884c\u671f（6.1 \u8282）\u3002\u8fd9\u662f\u5b89\u5168\u7279\u6027，\u4e0d\u662f\u7f16\u8bd1\u5668\u51fa\u9519\u3002<\/p>\n Q8：Option \u548c\u4e0b\u8282\u8bfe\u7684 Result \u6709\u4ec0\u4e48\u533a\u522b？ Option \u53ea\u56de\u7b54"\u6709\u6ca1\u6709"\u2014\u2014None \u4e0d\u643a\u5e26\u4efb\u4f55\u4fe1\u606f；\u4f46\u5f88\u591a\u5931\u8d25\u8fd8\u9700\u8981\u8bf4\u660e"\u4e3a\u4ec0\u4e48\u5931\u8d25"（\u6587\u4ef6\u4e0d\u5b58\u5728？\u6743\u9650\u4e0d\u591f？\u683c\u5f0f\u9519\u8bef？）\u3002\u7b2c 10 \u8bfe\u7684 Result<T, E> \u7528 Ok(\u503c) \/ Err(\u539f\u56e0) \u8868\u8fbe\u8fd9\u79cd\u573a\u666f，\u914d\u5408\u5f02\u5e38\u673a\u5236\u4e00\u8d77\u5b66\u3002<\/p>\n
\n\u4e5d\u3001\u8bfe\u540e\u7ec3\u4e60<\/h3>\n - \u5b9e\u73b0 func indexOf(a: Array<Int64>, target: Int64): ?Int64：\u8fd4\u56de\u76ee\u6807\u7b2c\u4e00\u6b21\u51fa\u73b0\u7684\u4e0b\u6807（Some(\u4e0b\u6807)），\u627e\u4e0d\u5230\u8fd4\u56de None\u3002\u7528\u6570\u7ec4 [5, 2, 9, 1, 5, 6] \u6d4b\u8bd5\u67e5\u627e 9 \u4e0e 100，\u5e76\u7528 ?? -1 \u6253\u5370"\u627e\u4e0d\u5230\u65f6\u663e\u793a -1"\u7684\u98ce\u683c\u5316\u7ed3\u679c\u3002<\/li>\n
- \u7ed9\u7b2c 8 \u8bfe\u7684\u901a\u8baf\u5f55\u52a0\u4e00\u4e2a\u5b89\u5168\u67e5\u8be2\u51fd\u6570 findPhone(map, name)，\u5185\u90e8\u7528 get + match：\u6709\u53f7\u7801\u6253\u5370\u53f7\u7801，\u6ca1\u6709\u65f6\u6253\u5370"\u67e5\u65e0\u6b64\u4eba"\u3002\u6545\u610f\u67e5\u4e00\u4e2a\u4e0d\u5b58\u5728\u7684\u540d\u5b57\u9a8c\u8bc1\u4e0d\u4f1a\u5d29\u3002<\/li>\n
- \u7528 map + ?? \u4e00\u884c\u5b8c\u6210：\u7ed9\u5b9a let age: ?Int64（\u5206\u522b\u8bd5 Some(17)\u3001Some(20)\u3001None），\u8f93\u51fa"\u6210\u5e74"\/\u201c\u672a\u6210\u5e74\u201d\/\u201c\u5e74\u9f84\u672a\u77e5\u201d\u3002<\/li>\n
- \u5b9a\u4e49 class Book，\u542b\u53ef\u7a7a\u5b57\u6bb5 borrower: ?String（\u501f\u9605\u4eba，\u6ca1\u4eba\u501f\u65f6\u4e3a None）；\u51c6\u5907\u4e00\u4e2a\u8fd4\u56de ?Book \u7684\u67e5\u8be2\u51fd\u6570，\u7528 flatMap \u53d6\u51fa\u5f53\u524d\u501f\u9605\u4eba\u59d3\u540d\u5e76\u6253\u5370，\u6ca1\u4eba\u501f\u6216\u4e66\u4e0d\u5b58\u5728\u65f6\u7edf\u4e00\u663e\u793a"\u5728\u9986\u53ef\u501f"\u3002<\/li>\n
- \u6253\u5f00 7.1 \u7684\u7a0b\u5e8f Shift + F9 \u8c03\u8bd5，\u5728\u5faa\u73af\u4e2d\u89c2\u5bdf score \u5728 Some(…) \u4e0e None \u95f4\u7684\u53d8\u5316；\u518d\u5230 \u2463 \u5bf9\u6bd4 ?.nickname \u4e0e flatMap \u540e\u53d8\u91cf\u7684\u5c42\u6570\u5dee\u5f02，\u622a\u56fe\u6216\u53e3\u8ff0\u4e24\u8005\u533a\u522b\u3002<\/li>\n
\n\u4e0b\u8282\u9884\u544a<\/h3>\nOption \u89e3\u51b3\u4e86"\u6709\u6ca1\u6709\u503c"，\u4f46\u5b83\u6709\u4e2a\u76f2\u533a：None \u53ea\u80fd\u8868\u793a"\u6ca1\u6709"，\u8bf4\u4e0d\u51fa\u4e3a\u4ec0\u4e48\u6ca1\u6709\u3002\u6587\u4ef6\u8bfb\u4e0d\u5230\u3001\u7f51\u7edc\u5931\u8d25\u3001JSON \u683c\u5f0f\u9519\u8bef\u2014\u2014\u8fd9\u4e9b\u573a\u666f\u6211\u4eec\u8fd8\u60f3\u5e26\u4e0a\u539f\u56e0\u751a\u81f3\u9519\u8bef\u7801\u3002\u7b2c 10 \u8bfe\u5b66\u4e60\u9519\u8bef\u5904\u7406：\u5f02\u5e38\u673a\u5236\u4e0e Result：throw \/ try-catch \u600e\u4e48\u7528，Result<T, E> \u5982\u4f55\u628a\u9519\u8bef\u4e5f\u53d8\u6210\u7f16\u8bd1\u5668\u5e2e\u4f60\u68c0\u67e5\u7684\u8fd4\u56de\u503c，\u4ee5\u53ca\u4ed3\u9889"\u5f02\u5e38 + Result"\u53cc\u8f68\u5236\u5404\u81ea\u9002\u5408\u4ec0\u4e48\u573a\u666f\u3002\u6211\u4eec\u4e0b\u8282\u8bfe\u89c1！<\/p>\n
\n\u7cfb\u5217\u8bf4\u660e：\u672c\u7cfb\u5217\u57fa\u4e8e Windows \u5e73\u53f0 + CIDE + \u4ed3\u9889 SDK（1.1.3）\u7f16\u5199，\u6240\u6709\u4ee3\u7801\u5747\u5df2\u5b9e\u9645\u7f16\u8bd1\u8fd0\u884c\u901a\u8fc7\u3002\u5982\u9047 SDK \u7248\u672c\u5dee\u5f02\u5bfc\u81f4\u7684\u7ec6\u8282\u51fa\u5165，\u4ee5\u4f60\u672c\u5730\u7248\u672c\u4e3a\u51c6，\u6b22\u8fce\u8bc4\u8bba\u533a\u4ea4\u6d41\u3002<\/p>\n
\n\u79bb\u7ebf\u73af\u5883\u4e0b\u56fe\u7247\u53ef\u80fd\u52a0\u8f7d\u4e0d\u51fa\u6765，\u4e5f\u53ef\u4ee5\u5728 CIDE \u83dc\u5355 Help \u25b8 \u8054\u7cfb\u4f5c\u8005 \/ Contact \u4e2d\u67e5\u770b\u540c\u4e00\u5f20\u4e8c\u7ef4\u7801（\u5e94\u7528\u5185\u7f6e\u515c\u5e95\u56fe，\u65e0\u9700\u8054\u7f51）\u3002<\/p>\n
\n📥 \u5de5\u5177\u4e0b\u8f7d<\/h3>\n\u672c\u7cfb\u5217\u5168\u7a0b\u4f7f\u7528\u7684\u4ed3\u9889 IDE \u2014\u2014 CIDE（\u514d\u8d39\u5f00\u6e90\u3001\u793e\u533a\u7248）：<\/p>\n \n- GitCode \u4ed3\u5e93 \/ \u5b89\u88c5\u5305\u4e0b\u8f7d：https:\/\/gitcode.com\/wp_upala\/cide<\/li>\n
- \u6253\u5f00\u9875\u9762\u540e\u8fdb\u5165 \u53d1\u884c\u7248（Releases），\u4e24\u79cd\u5305\u4efb\u9009\u5176\u4e00：\n
\n- \u5b89\u88c5\u7248：\u4e0b\u8f7d CIDE-<\u7248\u672c>-x64-Setup.exe，\u53cc\u51fb\u5b89\u88c5，\u9002\u5408\u65e5\u5e38\u957f\u671f\u4f7f\u7528；<\/li>\n
- \u514d\u5b89\u88c5\u7248（Portable）：\u4e0b\u8f7d CIDE-<\u7248\u672c>-x64-Portable.zip，\u89e3\u538b\u5230\u4efb\u610f\u76ee\u5f55\u5373\u7528，\u4e0d\u5199\u6ce8\u518c\u8868\u3001\u4e0d\u7559\u5b89\u88c5\u75d5\u8ff9，\u62f7\u5230 U \u76d8\u4e5f\u80fd\u5728\u522b\u7684\u7535\u8111\u76f4\u63a5\u8fd0\u884c（\u5305\u5185\u9644\u300a\u4f7f\u7528\u8bf4\u660e.txt\u300b）\u3002\u9002\u5408\u5148\u8bd5\u7528\u3001\u6216\u5728\u53d7\u9650\u7535\u8111\u4e0a\u5b66\u4e60\u672c\u7cfb\u5217\u8bfe\u7a0b\u3002<\/li>\n<\/ul>\n<\/li>\n
- \u4ed3\u9889 SDK \u8bf7\u524d\u5f80\u4ed3\u9889\u7f16\u7a0b\u8bed\u8a00\u5b98\u7f51\u4e0b\u8f7d：https:\/\/cangjie-lang.cn<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
\u3010\u4ed3\u9889\u8bed\u8a00\u5165\u95e8 \u00b7 \u7b2c9\u8bfe\u3011\u53ef\u7a7a\u7c7b\u578b ? \u4e0e Option：\u8ba9\\”\u6ca1\u6709\u503c\\”\u65e0\u6cd5\u4f24\u4eba \u4e0a\u8282\u8bfe\u6211\u4eec\u5728 HashMap \u7684\u8f93\u51fa\u91cc\u53cd\u590d\u770b\u5230 Some(138-0000-0001)\u3001NoneValueException: Value does not exist!\u2014\u2014\u5f53\u65f6\u53ea\u7559\u4e86\u53e5\\”\u7b2c 9 \u8bfe\u8bb2\\”\u3002\u8fd9\u8282\u8bfe\u5c31\u6765\u6b63\u5f0f\u8ba4\u8bc6\u5b83\u4eec\u80cc\u540e\u7684\u8bbe\u8ba1：\u53ef\u7a7a\u7c7b\u578b ? \u4e0e Option\u3002 \u672c\u6587\u662f\u7cfb\u5217\u7b2c 9 \u8bfe：\u7406\u89e3\u4ed3\u9889\u4e3a\u4ec0\u4e48\u6562\u8bf4\\”\u4ece\u7c7b\u578b\u5c42\u9762\u6d88\u706d\u7a7a\u6307\u9488\\”，\u638c\u63e1<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[70,227],"topic":[],"class_list":["post-106763","post","type-post","status-publish","format-standard","hentry","category-server","tag-ide","tag-227"],"yoast_head":"\n \u3010\u4ed3\u9889\u8bed\u8a00\u5165\u95e8 \u00b7 \u7b2c9\u8bfe\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/106763.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u3010\u4ed3\u9889\u8bed\u8a00\u5165\u95e8 \u00b7 \u7b2c9\u8bfe\u3011 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u3010\u4ed3\u9889\u8bed\u8a00\u5165\u95e8 \u00b7 \u7b2c9\u8bfe\u3011\u53ef\u7a7a\u7c7b\u578b ? 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