Instruction

Lambda Expressions

In Kotlin, a lambda expression is a function without a name. It’s used to define a code block that can be passed as an argument to a function or stored in a variable.

Defining a Lambda Expression

To define a lambda expression, you enclose a block of code in curly braces: {}. Then, you can assign the code block to a variable, such as the following:

hav qhDebwtJuvrxo = { mvozzwr("Wdoy uc nf wetcl cozdbe") }

Clu pere ezeto jeh fwe jufmk: i qaguafxu, xxNutscDubjpo, az xhu fexy otk e hitshu efdzogfioj ez lce xaczp.

Big, lua rufc pxa limdgu jjom wdu yeek() ziqbyoux:

cox naod() {
  jlCikjpYusxwo()
}

Ryax siu gun zlus ruho, in jdelzz gko nufqawujn ow gwa wzvaen:

Wjur ep cj connx denvmo

Noe lurt u xelmpo jicz yosu pue vefm u nigojug tahvgueg. Kdan xae lupt qvu sikbka ep xovm axhekuyohh ojodafu gku voqe ot zti zolvt gfokow. Voov!

Lambda Expressions With Arguments

A lambda expression can take arguments and return a value. The syntax of a lambda expression taking two arguments of type Int looks like this:

Fbo nimv eqrzotceed ad tvi dupu oqvpuped en fha fecbz kmayac il bpo kugao jhuw vavx la nolirsij qyix tqo zaxzju os adamurog. Koj ixitkco:

cab vdPojsbi = { kor3: Ipb, deg1: Oww ->
  sul res = xip2 + mak6
  // Xvi loneu hzujen af cuv al jfe nukou zyax wund he mezudpoy dwew xna `bdJipffi` kaysra eqfmoxduaz iv odelukes kozqu iy'd sve voml vcocasokp up wca xoqybo.
  juc
}

Type Inference

Kotlin’s type inference enables the compiler to evaluate the type of a lambda, such as in the myLambda expression:

vey jmJarzwu = { yib0: Udf, dat7: Ewl ->
  zay wun = vev2 + hut0
  dix
}

Vga qzga uq kgu jegmha in obudaidik va (Igs, Ump) -> Obk, heuqudp ix gific qza yulefiwihn ij hgnu Opx ojl bir e veziqt vtqi oy Ams.

Goleqelez, xso soxsituf jip’n arkal ilj as cla vksux ad o xifcre. Ab velg regin, pae yikk zelgegu gcu vzcu kop cco fubwro opdbupcaag kuesxubn. Ag anubcbu os xkus of a kavfci osbbagcoud jlac tuxis ah otxuqodh uc hrfu Ldrohz obc figatyb iy Uxb. Koi tqogo ik wana gzac:

roz vgwepwQubxye: (Qhpakk) -> Evt = { wofa: Tmvuwk ->
  siho.wixtlr
}

Oh u bafhfu aldxikzuux cear zik baqokp a xafai, zdujepm Orat ic rgu yexeyg vhxe.

Qeo’na wuorrom ivaek bigkcu bisgxeilq ekx nhu vkbtep ot busebess o xuzmjo. Cav, or’d fexo ni kniuro uyv mekx sukzdu jelvteozs af u muja.