{"id":2535,"date":"2024-10-06T12:13:47","date_gmt":"2024-10-06T03:13:47","guid":{"rendered":"http:\/\/batmask.dothome.co.kr\/?p=2535"},"modified":"2024-10-07T15:52:30","modified_gmt":"2024-10-07T06:52:30","slug":"kotlin-%ec%97%90-%ec%9d%b5%ec%88%99%ed%95%b4%ec%a7%80%ea%b8%b0-%eb%82%af%ec%84%a0-%eb%ac%b8%eb%b2%95%eb%93%a4-%ec%a0%95%eb%a6%ac-1","status":"publish","type":"post","link":"http:\/\/batmask.net\/index.php\/2024\/10\/06\/2535\/","title":{"rendered":"Kotlin \uc5d0 \uc775\uc219\ud574\uc9c0\uae30 : \ub0af\uc120 \ubb38\ubc95\ub4e4 \uc815\ub9ac #1"},"content":{"rendered":"\n

when \ubb38 : https:\/\/kotlinlang.org\/docs\/control-flow.html#when-expression<\/a><\/h3>\n\n\n\n

\ucd5c\uc2e0 \uc5b8\uc5b4\ub4e4\uc740 switch-case \ubb38\uc744 \uc548\uc4f0\ub294 \ucd94\uc138\ub2e4. \ub300\uc2e0 \ub354 \uc720\uc5f0\ud558\uace0 \uc9c4\ubcf4\uc801\uc778 when\ubb38\uc774 \uc0dd\uae40. when\ubb38\uc740 switch-case\uc640 \uc720\uc0ac\ud558\uac8c \uc870\uac74 \ud45c\ud604\uc2dd\uc5d0 \ub530\ub77c \uc5ec\ub7ec \uacbd\uc6b0\uc758 \uc218\uc5d0 \ub300\ud574 \ucc98\ub9ac\ub97c \ub2ec\ub9ac \ud574\uc8fc\ub294 \ud45c\ud604\uc2dd\uc774\ub2e4.<\/p>\n\n\n\n

<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
when<\/span> (x) {<\/span><\/span>\n    <\/span>1<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x == 1"<\/span>)<\/span><\/span>\n    <\/span>2<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x == 2"<\/span>)<\/span><\/span>\n    <\/span>else<\/span> <\/span>-><\/span> {<\/span><\/span>\n        <\/span>print<\/span>(<\/span>"x is neither 1 nor 2"<\/span>)<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
swich \ubb38\uacfc \ub2e4\ub974\uac8c break\ub098 continue\uac00 \uc5c6\ub2e4. \ub300\uc2e0 \uc21c\ucc28\uc801\uc73c\ub85c \uc870\uac74\uc744 \uccb4\ud06c\ud558\uba74\uc11c \ub9cc\uc871\ud558\ub294 \ube0c\ub79c\uce58\ub97c \ucc3e\uc544 \uc2e4\ud589\ud558\uac8c \ub41c\ub2e4.  when\uc740 \uadf8\ub0e5 statement\ub85c\ub3c4 \uc4f0\uc77c \uc218 \uc788\uc9c0\ub9cc, expression\uc73c\ub85c \uc0ac\uc6a9\ub420 \uc218\ub3c4 \uc788\ub2e4. \uc774 \uacbd\uc6b0, \uc870\uac74\uc2dd\uc758 \ub9c8\uc9c0\ub9c9 expression\uac12\uc774 \ub9ac\ud134\uac12\uc774\ub77c\uace0 \uc0dd\uac01\ud558\uba74 \ub41c\ub2e4. \ub610\ud55c, \ub098\uc5f4\ub418\ub294 \uc870\uac74\uc774 \ubaa8\ub4e0 \uac00\ub2a5\ud55c \uc870\uac74\uc744 \ud3ec\ud568\ud558\ub294 \uacbd\uc6b0,  else\ub294 \uc0dd\ub7b5\ub420 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
enum<\/span> <\/span>class<\/span> <\/span>Bit<\/span> {<\/span><\/span>\n    ZERO, ONE<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nval<\/span> numericValue <\/span>=<\/span> <\/span>when<\/span> (<\/span>getRandomBit<\/span>()) {<\/span><\/span>\n    Bit.ZERO <\/span>-><\/span> <\/span>0<\/span><\/span>\n    Bit.ONE <\/span>-><\/span> <\/span>1<\/span><\/span>\n    <\/span>\/\/ 'else' is not required because all cases are covered<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
 \uc5ec\ub7ec \ucf00\uc774\uc2a4\ub97c \ud569\uce58\ub294 \uacbd\uc6b0\uc5d4 \ucf64\ub9c8(,)\ub85c \ucee8\ub514\uc158\uc744 \ud55c \ub77c\uc778\uc5d0 \ub098\uc5f4 \ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
when<\/span> (x) {<\/span><\/span>\n    <\/span>0<\/span>, <\/span>1<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x == 0 or x == 1"<\/span>)<\/span><\/span>\n    <\/span>else<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"otherwise"<\/span>)<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc870\uac74\ubd80\ubd84\uc5d0 \uc784\uc758\uc758 \ud45c\ud604\uc2dd \uc0ac\uc6a9\ub3c4 \uac00\ub2a5\ud558\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
when<\/span> (x) {<\/span><\/span>\n    s.<\/span>toInt<\/span>() <\/span>-><\/span> <\/span>print<\/span>(<\/span>"s encodes x"<\/span>)<\/span><\/span>\n    <\/span>else<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"s does not encode x"<\/span>)<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
in, !in \uc744 \uc774\uc6a9\ud574 range \uccb4\ud06c\ub3c4 \uac00\ub2a5.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
when<\/span> (x) {<\/span><\/span>\n    <\/span>in<\/span> <\/span>1<\/span>..<\/span>10<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x is in the range"<\/span>)<\/span><\/span>\n    <\/span>in<\/span> validNumbers <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x is valid"<\/span>)<\/span><\/span>\n    <\/span>!in<\/span> <\/span>10<\/span>..<\/span>20<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x is outside the range"<\/span>)<\/span><\/span>\n    <\/span>else<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"none of the above"<\/span>)<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
is, !is\ub97c \uc774\uc6a9\ud574 \ud0c0\uc785 \uccb4\ud06c\ub3c4 \uac00\ub2a5.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
fun<\/span> <\/span>hasPrefix<\/span>(x: <\/span>Any<\/span>) <\/span>=<\/span> <\/span>when<\/span>(x) {<\/span><\/span>\n    <\/span>is<\/span> String <\/span>-><\/span> x.<\/span>startsWith<\/span>(<\/span>"prefix"<\/span>)<\/span><\/span>\n    <\/span>else<\/span> <\/span>-><\/span> <\/span>false<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc778\uc790 \uc5c6\uc774 if-else \uccb4\uc778\uc744 \ub300\uc2e0\ud574\uc11c \uc0ac\uc6a9\ub3c4 \uac00\ub2a5\ud558\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
when<\/span> {<\/span><\/span>\n    x.<\/span>isOdd<\/span>() <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x is odd"<\/span>)<\/span><\/span>\n    y.<\/span>isEven<\/span>() <\/span>-><\/span> <\/span>print<\/span>(<\/span>"y is even"<\/span>)<\/span><\/span>\n    <\/span>else<\/span> <\/span>-><\/span> <\/span>print<\/span>(<\/span>"x+y is odd"<\/span>)<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\"seperator\"<\/figure>\n\n\n\n
for \ubb38 : https:\/\/kotlinlang.org\/docs\/control-flow.html#for-loops<\/a><\/h3>\n\n\n\n
for \ub8e8\ud504\ub3c4 C\ub098 \uc790\ubc14\ucc98\ub7fc \ucd08\uae30\uce58; \uc870\uac74; \uc99d\uac00\ubd84 \ud615\ud0dc\uac00 \uc544\ub2c8\ub77c \ud30c\uc774\uc36c\uac19\uc740 \ubc29\uc2dd\uc73c\ub85c \uc0ac\uc6a9\ub41c\ub2e4. \uc81c\uacf5\ub418\ub294 iterator\uc5d0 \ub300\ud574\uc11c \uc21c\ud68c\ud558\ub294 \ubc29\uc2dd\uc774\ub2e4. \uc774\ub294 C#\uc758 foreach\ubb38\uacfc \ub3d9\uc77c\ud558\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
for<\/span> (item <\/span>in<\/span> collection) <\/span>print<\/span>(item)<\/span><\/span>\n<\/span>\nfor<\/span> (item: <\/span>Int<\/span> <\/span>in<\/span> <\/span>ints<\/span>) {<\/span><\/span>\n    <\/span>\/\/ ...<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc8fc\uc5b4\uc9c4 iterator\ub97c \uc774\uc6a9\ud55c\ub2e4\ub294 \uc598\uae30\ub294 \ub9ac\ud134\uac12\uc774 Iterator<>\uc778 iterator() \ub3c4 \uba64\ubc84\ub85c \uac16\uace0 \uc788\uac70\ub098 \ud655\uc7a5\ud568\uc218\ub85c \uac00\uc838\uc57c \ud55c\ub2e4. \ub610\ud55c, next()\uc640 hasNext()\ub97c \uba64\ubc84\ub85c \uac16\uac70\ub098 \ud655\uc7a5\ud568\uc218\ub85c \uac16\uace0 \uc788\uc5b4\uc57c \ud55c\ub2e4.<\/p>\n\n\n\n
range \ud45c\ud604\uc2dd\uc744 \uc0ac\uc6a9\ud558\ub294 \uacbd\uc6b0\uc758 \uc608\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
for<\/span> (i <\/span>in<\/span> <\/span>1<\/span>..<\/span>3<\/span>) {<\/span><\/span>\n    <\/span>println<\/span>(i)<\/span><\/span>\n}<\/span><\/span>\nfor<\/span> (i <\/span>in<\/span> <\/span>6<\/span> downTo <\/span>0<\/span> step <\/span>2<\/span>) {<\/span><\/span>\n    <\/span>println<\/span>(i)<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
array\ub098 list\uc758 \uc778\ub371\uc2a4\ub85c \uc21c\ud68c\ud558\ub294 \uacbd\uc6b0\uc758 \uc608\ub294 \ub2e4\uc74c\uacfc \uac19\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
for<\/span> (i <\/span>in<\/span> array.indices) {<\/span><\/span>\n    <\/span>println<\/span>(array[i])<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc774\uac78 withIndex\ub97c \uc0ac\uc6a9\ud558\uc5ec \ub2e4\uc74c\uacfc \uac19\uc774 \uc0ac\uc6a9\ud558\uba74  index\uc640 value\ub97c \ubcf4\ub2e4 \uac00\ub3c5\uc131\uc774 \uc88b\uac8c \uc0ac\uc6a9 \uac00\ub2a5\ud558\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
for<\/span> ((index, <\/span>value<\/span>) <\/span>in<\/span> array.<\/span>withIndex<\/span>()) {<\/span><\/span>\n    <\/span>println<\/span>(<\/span>"the element at <\/span>$index<\/span> is <\/span>$value<\/span>"<\/span>)<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\"seperator\"<\/figure>\n\n\n\n
extention function : https:\/\/kotlinlang.org\/docs\/extensions.html<\/a><\/h3>\n\n\n\n
 \uae30\uc874 \ud074\ub798\uc2a4\uc5d0 \uc0c8 \uae30\ub2a5\uc744 \ub123\uc73c\ub824\uba74 \uc0c1\uc18d(inheritance)\uc744 \ubc1b\uc544 \uad6c\ud604\ud558\ub294\uac8c \ubcf4\ud1b5\uc774\ub2e4. \uc544\ub2c8\uba74 \uae30\uc874 \ud074\ub798\uc2a4\ub97c \ud3ec\ud568\ud558\ub294 \uc0c8 \ud074\ub798\uc2a4\ub97c \ub9cc\ub4e4\uace0 \uadf8 \uba64\ubc84\ub85c \uae30\uc874 \ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud558\ub294 composition, \ub610\ub294 \uc0c8 \ud074\ub798\uc2a4\uc758 \uc0dd\uc131\uc790\uc758 \uc778\uc790\ub85c \uae30\uc874 \ud074\ub798\uc2a4\ub97c \ub118\uaca8\uc11c \uba64\ubc84\uc5d0 \uc800\uc7a5\ud558\ub294 Aggregation\uc744 \uc774\uc6a9\ud560 \uc218\ub3c4 \uc788\ub2e4. Decorator \ud328\ud134\uc740 Aggregation\uc744 \uc774\uc6a9\ud558\uac8c \ub418\ub294\ub370, \ucf54\ud2c0\ub9b0\uc5d0\uc11c\ub294 Extension function\uc744 \uc774\uc6a9\ud574 \uc774\ub97c \uc190\uc27d\uac8c \uad6c\ud604\ud560 \uc218 \uc788\ub2e4. <\/p>\n\n\n\n
Extension function\uc740 \ub9ac\uc2dc\ubc84 \ud0c0\uc785 \ud074\ub798\uc2a4\ub97c \uc9c0\uc815\ud558\uace0 \ud568\uc218\ub97c \uc815\uc758\ud55c\ub2e4. <\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
fun<\/span> <\/span>MutableList<\/span><<\/span>Int<\/span>><\/span>.<\/span>swap<\/span>(index1: <\/span>Int<\/span>, index2: <\/span>Int<\/span>) {<\/span><\/span>\n    <\/span>val<\/span> tmp <\/span>=<\/span> <\/span>this<\/span>[index1] <\/span>\/\/ 'this' corresponds to the list<\/span><\/span>\n    <\/span>this<\/span>[index1] <\/span>=<\/span> <\/span>this<\/span>[index2]<\/span><\/span>\n    <\/span>this<\/span>[index2] <\/span>=<\/span> tmp<\/span><\/span>\n}<\/span><\/span>\n<\/span>\nval<\/span> list <\/span>=<\/span> <\/span>mutableListOf<\/span>(<\/span>1<\/span>, <\/span>2<\/span>, <\/span>3<\/span>)<\/span><\/span>\nlist.<\/span>swap<\/span>(<\/span>0<\/span>, <\/span>2<\/span>) <\/span>\/\/ 'this' inside 'swap()' will hold the value of 'list'<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\ub9cc\uc57d, \uae30\uc874\uc5d0 \uac16\uace0\uc788\ub294 \uba64\ubc84\ud568\uc218\uc640 \ub3d9\uc77c\ud558\uac8c \ud655\uc7a5\ud568\uc218\ub97c \uc815\uc758\ud558\uba74 \ud56d\uc0c1 \uba64\ubc84\ud568\uc218\uac00 \ubd88\ub9ac\uac8c \ub41c\ub2e4. \uc774\uc640 \ub3d9\uc77c\ud558\uac8c property\ub3c4 extension property \uc0ac\uc6a9\uc774 \uac00\ub2a5\ud558\ub2e4. <\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
val<\/span> <<\/span>T<\/span>> List<\/span><<\/span>T<\/span>><\/span>.lastIndex: <\/span>Int<\/span><\/span>\n    <\/span>get<\/span>() <\/span>=<\/span> size <\/span>-<\/span> <\/span>1<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\"seperator\"<\/figure>\n\n\n\n
Class Constructors : https:\/\/kotlinlang.org\/docs\/classes.html#constructors<\/a><\/h3>\n\n\n\n
\uae30\ubcf8\uc801\uc73c\ub85c primary constructor\ub294 \ud074\ub798\uc2a4 \uc120\uc5b8\uc5d0 ‘constructor’ \ud0a4\uc6cc\ub4dc\uc640 \ud568\uaed8 \uc0ac\uc6a9\ud55c\ub2e4. annotation\uc774\ub098 visibility modifier \uac00 \uc5c6\ub2e4\uba74, \ud0a4\uc6cc\ub4dc\ub294 \uc0dd\ub7b5\uc774 \uac00\ub2a5\ud558\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
class<\/span> <\/span>Person<\/span> <\/span>constructor<\/span>(firstName: <\/span>String<\/span>) { <\/span>\/*...*\/<\/span> }<\/span><\/span>\nclass<\/span> <\/span>Person<\/span>(firstName: <\/span>String<\/span>) { <\/span>\/*...*\/<\/span> }<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc774\ub807\uac8c \uc4f0\uba74, \uc0dd\uc131\uc790 \ubc14\ub514\uac00 \uc5c6\ub294 \uc0c1\ud0dc\uc778\ub370, \ud074\ub798\uc2a4 \uc548\uc5d0\uc11c init { } \ube14\ub7ed\uc744 \uc774\uc6a9\ud574 \uc0dd\uc131\uc790 \ucf54\ub4dc\ub97c \uc0ac\uc6a9\ud560 \uc218 \uc788\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
class<\/span> <\/span>InitOrderDemo<\/span>(name: <\/span>String<\/span>) {<\/span><\/span>\n    <\/span>val<\/span> firstProperty <\/span>=<\/span> <\/span>"First property: <\/span>$name<\/span>"<\/span>.<\/span>also<\/span>(::<\/span>println<\/span>)<\/span><\/span>\n    <\/span><\/span>\n    <\/span>init<\/span> {<\/span><\/span>\n        <\/span>println<\/span>(<\/span>"First initializer block that prints <\/span>$name<\/span>"<\/span>)<\/span><\/span>\n    }<\/span><\/span>\n    <\/span><\/span>\n    <\/span>val<\/span> secondProperty <\/span>=<\/span> <\/span>"Second property: ${name.length}"<\/span>.<\/span>also<\/span>(::<\/span>println<\/span>)<\/span><\/span>\n    <\/span><\/span>\n    <\/span>init<\/span> {<\/span><\/span>\n        <\/span>println<\/span>(<\/span>"Second initializer block that prints ${name.length}"<\/span>)<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc774 init { } \ube14\ub7ed\uc740 \uc778\uc2a4\ud134\uc2a4 \uc0dd\uc131\uc2dc, \uae30\uc220\ub41c \uc21c\uc11c\ub300\ub85c \uc2e4\ud589\ub41c\ub2e4. \ub610\ud55c, property \ucd08\uae30\ud654\ub3c4 \uc0dd\uc131\uc790\ub85c \uc0ac\uc6a9\ub41c\ub2e4. <\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
class<\/span> <\/span>Customer<\/span>(name: <\/span>String<\/span>) {<\/span><\/span>\n    <\/span>val<\/span> customerKey <\/span>=<\/span> name.<\/span>uppercase<\/span>()<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
\uc880 \ub354 \uac04\ud3b8\ud558\uac8c, primary \uc0dd\uc131\uc790\uc5d0 property\ub4e4\uc744 \uc9c1\uc811 \uae30\uc220 \ud560 \uc218 \uc788\ub2e4. \ub9c8\uc9c0\ub9c9\uc5d0 \ucf64\ub9c8\uac00 \uc788\uc5b4\ub3c4 \uc0c1\uad00\uc5c6\ub2e4.<\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
class<\/span> <\/span>Person<\/span>(<\/span>val<\/span> firstName: <\/span>String<\/span>, <\/span>val<\/span> lastName: <\/span>String<\/span>, <\/span>var<\/span> age: <\/span>Int<\/span>,)<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
primary constructor \uc678\uc5d0 \ucd94\uac00\ub85c \uc0dd\uc131\uc790\uac00 \ud544\uc694\ud558\ub2e4\uba74, \ud074\ub798\uc2a4 \ubc14\ub514\uc548\uc5d0 constructor \ud0a4\uc6cc\ub4dc\ub97c \uc774\uc6a9\ud574 \uc120\uc5b8\ud55c\ub2e4. primary constructor\uac00 \uc874\uc7ac\ud55c\ub2e4\uba74, secondary constructor\ub294 primary constructor\uc5d0 delegate\ud574\uc57c\ud55c\ub2e4. <\/p>\n\n\n\n
<\/circle><\/circle><\/circle><\/g><\/svg><\/span><\/path><\/path><\/svg><\/span>
class<\/span> <\/span>Person<\/span>(<\/span>val<\/span> name: <\/span>String<\/span>) {<\/span><\/span>\n    <\/span>val<\/span> children: <\/span>MutableList<\/span><<\/span>Person<\/span>> <\/span>=<\/span> <\/span>mutableListOf<\/span>()<\/span><\/span>\n    <\/span>constructor<\/span>(name: <\/span>String<\/span>, parent: <\/span>Person<\/span>) : <\/span>this<\/span>(<\/span>name<\/span>) {<\/span><\/span>\n        parent.children.<\/span>add<\/span>(<\/span>this<\/span>)<\/span><\/span>\n    }<\/span><\/span>\n}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n
this\ub97c \uc0ac\uc6a9\ud558\uba74 \ub418\uba70, \uc704 \ucf54\ub4dc\uc5d0\uc11c this(name)\uc774 \uc0ac\uc6a9\ub418\uc5c8\ub2e4.<\/p>\n","protected":false},"excerpt":{"rendered":"
when \ubb38 : https:\/\/kotlinlang.org\/docs\/control-flow.html#when-expression \ucd5c\uc2e0 \uc5b8\uc5b4\ub4e4\uc740 switch-case \ubb38\uc744 \uc548\uc4f0\ub294 \ucd94\uc138\ub2e4. \ub300\uc2e0 \ub354 \uc720\uc5f0\ud558\uace0 \uc9c4\ubcf4\uc801\uc778 when\ubb38\uc774 \uc0dd\uae40. when\ubb38\uc740 switch-case\uc640 \uc720\uc0ac\ud558\uac8c \uc870\uac74 \ud45c\ud604\uc2dd\uc5d0 \ub530\ub77c \uc5ec\ub7ec \uacbd\uc6b0\uc758 \uc218\uc5d0 \ub300\ud574 \ucc98\ub9ac\ub97c \ub2ec\ub9ac \ud574\uc8fc\ub294 \ud45c\ud604\uc2dd\uc774\ub2e4. swich \ubb38\uacfc \ub2e4\ub974\uac8c break\ub098 continue\uac00 \uc5c6\ub2e4. \ub300\uc2e0 \uc21c\ucc28\uc801\uc73c\ub85c \uc870\uac74\uc744 \uccb4\ud06c\ud558\uba74\uc11c \ub9cc\uc871\ud558\ub294 \ube0c\ub79c\uce58\ub97c \ucc3e\uc544 \uc2e4\ud589\ud558\uac8c \ub41c\ub2e4. when\uc740 \uadf8\ub0e5 statement\ub85c\ub3c4 \uc4f0\uc77c \uc218 \uc788\uc9c0\ub9cc, expression\uc73c\ub85c \uc0ac\uc6a9\ub420 \uc218\ub3c4 \uc788\ub2e4. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34],"tags":[38,41],"class_list":["post-2535","post","type-post","status-publish","format-standard","hentry","category-kotlin","tag-kotlin","tag-kotlin-kr"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/posts\/2535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/comments?post=2535"}],"version-history":[{"count":27,"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/posts\/2535\/revisions"}],"predecessor-version":[{"id":2563,"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/posts\/2535\/revisions\/2563"}],"wp:attachment":[{"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/media?parent=2535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/categories?post=2535"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/batmask.net\/index.php\/wp-json\/wp\/v2\/tags?post=2535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}