Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Speaker Deck
PRO
Sign in
Sign up
for free
apply() 要らなくない?
Motoi Washida
August 22, 2017
Programming
2
1.1k
apply() 要らなくない?
2017年の夏のKotlin LT祭での発表資料です。
https://kotlin.connpass.com/event/61427/
Motoi Washida
August 22, 2017
Tweet
Share
More Decks by Motoi Washida
See All by Motoi Washida
wm3
0
1.7k
wm3
1
140
wm3
0
610
wm3
2
960
wm3
0
210
wm3
1
770
Other Decks in Programming
See All in Programming
rishitdagli
0
180
akatsukinewgrad
0
160
freekmurze
0
200
pdone
0
210
osyo
1
370
muttsu_623
0
480
asumikan
0
280
malvinstn
1
630
yumcyawiz
4
620
rshindo
2
290
line_developers_tw2
0
660
azdaroth
0
160
Featured
See All Featured
pauljervisheath
196
15k
robhawkes
52
2.8k
62gerente
587
200k
morganepeng
92
13k
malarkey
393
60k
jakevdp
774
200k
garrettdimon
287
110k
geeforr
332
29k
imathis
478
150k
mthomps
39
2.3k
qrush
285
18k
maggiecrowley
8
400
Transcript
BQQMZ 銲זֻזְ 똲歊㛇
荈䊹稱➜
荈䊹稱➜ ˖ せ똲歊㛇 ˖ 5XJUUFS!XN ˖ "OESPJEؒٝآص، J04瘝װ ˖
3PPN$MJQהְֲ؎ٝذٔ،ⱖ溪ך $(.涪⚥
(PPHMF*0ך傈ח,PUMJO䱰欽׃ת׃
ַֿ ,PUMJO娖♲٠剢ך 蕯鰳罏ָזַ鎉ְתׅ
➙傈鎉ְְ✲
None
BQQMZ
銲זֻזְ
None
BQQMZ
أ؝٦فꟼ侧ך♧א ⴱ劍⻉ָٖؒؖٝز ח剅ֽ
BQQMZ ⢪זְה // { "key1": 1, "key2": 8 } //
ΛҾʹͯؔ͠Λݺͼ͍ͨ val map = Bundle() map.putInt("key1", 1) map.putInt("key2", 8) someFunction(map)
BQQMZ ⢪ֲה // { "key1": 1, "key2": 8 } //
ΛҾʹͯؔ͠Λݺͼ͍ͨ someMethod(Bundle().apply { putInt("key1", 1) putInt("key2", 8) })
瀉ְ
ֶ׃ׯ
,PUMJOזדכ ˟ הְֲ״+BWB 4XJGU鴟חכזְ
ד✉欽ׅה 汤ְ湡鋅ֲ
None
ㄎן⳿׃㼎韋ָ ♶僇然ח
⢽
⢽ class Point { var x = 0; var y
= 0 } var y = 0 // มએݴ val p = Point().apply { x = 3 y = 4 // Ͳͬͪͷ y? } println("p = (${p.x}, ${p.y})") // p = (3, 4) Λग़ྗͦ͠͏
⢽ class Point { var x = 0; var y
= 0 } var y = 0 // มએݴ val p = Point().apply { x = 3 y = 4 // Ͳͬͪͷ y? } println("p = (${p.x}, ${p.y})") // p = (3, 0) Λग़ྗ (※)
➿剏周
BMTP
➿剏周 class Point { var x = 0; var y
= 0 } var y = 0 val p = Point().apply { x = 3 y = 4 } println("p = (${p.x}, ${p.y})") // p = (3, 0) Λग़ྗ
➿剏周 BMTP class Point { var x = 0; var
y = 0 } var y = 0 val p = Point().also { it.x = 3 it.y = 4 } println("p = (${p.x}, ${p.y})") // p = (3, 4) Λग़ྗ
せ➰ֹ䒷侧
➿剏周 class Point { var x = 0; var y
= 0 } var y = 0 val p = Point().apply { x = 3 y = 4 } println("p = (${p.x}, ${p.y})") // p = (3, 0) Λग़ྗ
➿剏周 せ➰ֹ䒷侧 class Point(val x: Int, val y: Int) var
y = 0 val p = Point( x = 3, y = 4 ) println("p = (${p.x}, ${p.y})") // p = (3, 4) Λग़ྗ
猘鋅
BQQMZ ״BMTP ך倯ָ㸜Ⰻ
➙儗ךⶰ⡲欽ָ㼰זְ 鏣鎘أة؎ٕז ⢪ֲ堣⠓ָקרזְ
את
BQQMZ SVO XJUIכ MFU BMTPד➿欽
דְְךדכ
None
׀䠐鋅꧊⚥
ΤϯδχΞืूத ͓ؾܰʹ࿈བྷ͍ͩ͘͞ʂ