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| Original file line number | Diff line number | Diff line change |
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| # Crypto |
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| Original file line number | Diff line number | Diff line change |
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| # Loop Controls | ||
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| ## For | ||
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| The statement `For` lets you repeat a block of statements a specific number of times. | ||
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| - [TypeDoc](https://romarq.github.io/smartts-sdk/api/modules/statement.html#For) | ||
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| ```ts | ||
| const { | ||
| Contract, | ||
| EntryPoint, | ||
| TUnit, | ||
| For, | ||
| NewVariable, | ||
| SetValue, | ||
| ContractStorage, | ||
| GetVariable, | ||
| List, | ||
| Nat, | ||
| PrependToList | ||
| } = require('@tezwell/smartts-sdk'); | ||
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| const contract = new Contract() | ||
| // let <contract>.<storage> = []; | ||
| .setStorage(List([])) | ||
| .addEntrypoint( | ||
| new EntryPoint('entry_point_1') | ||
| .setInputType(TUnit()) | ||
| .code(() => [ | ||
| // let some_list = []; | ||
| NewVariable("some_list", List([])), | ||
| // for(let i = 0; i < 3; i=+1) { | ||
| // some_list = [...some_list, i]; | ||
| // } | ||
| For( | ||
| Nat(0), /* let i = 0; */ | ||
| Nat(3), /* i < 3; */ | ||
| Nat(1) /* i =+ 1 */ | ||
| ).Do((i) => [ | ||
| SetValue(GetVariable("some_list"), PrependToList(GetVariable("some_list"), i)) | ||
| ]), | ||
| // <contract>.<storage> = some_list; | ||
| SetValue(ContractStorage(), GetVariable("some_list")) | ||
| ]) | ||
| ); | ||
| ``` | ||
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| ## ForEachOf | ||
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| The `ForEachOf` lets you iterate over all elements of a `TList(...)` and apply a given block of statements on every iteration. | ||
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| - [TypeDoc](https://romarq.github.io/smartts-sdk/api/modules/statement.html#ForEachOf) | ||
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| ```ts | ||
| const { | ||
| Contract, | ||
| EntryPoint, | ||
| ContractStorage, | ||
| ForEachOf, | ||
| NewVariable, | ||
| SetValue, | ||
| Add, | ||
| PrependToList, | ||
| GetVariable, | ||
| TUnit, | ||
| List, | ||
| Nat | ||
| } = require('@tezwell/smartts-sdk'); | ||
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| const contract = new Contract() | ||
| // let <contract>.<storage> = [1, 2, 3]; | ||
| .setStorage(List([Nat(1), Nat(2), Nat(3)])) | ||
| .addEntrypoint( | ||
| new EntryPoint('entry_point_1') | ||
| .setInputType(TUnit()) | ||
| .code(() => [ | ||
| // let sum = 0; | ||
| NewVariable("sum", Nat(0)), | ||
| // <contract>.<storage>.forEach((el) => { | ||
| // sum += el; | ||
| // }) | ||
| ForEachOf(ContractStorage()).Do((el) => [ | ||
| SetValue(GetVariable("sum"), Add(GetVariable("sum"), el)) | ||
| ]), | ||
| // <contract>.<storage> = [...<contract>.<storage>, sum]; | ||
| SetValue(ContractStorage(), PrependToList(ContractStorage(), GetVariable("sum"))) | ||
| ]) | ||
| ); | ||
| ``` | ||
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| ## While | ||
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| The `While` statement lets you repeat a block of statements while a given condition evaluates to `true`. | ||
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| - [TypeDoc](https://romarq.github.io/smartts-sdk/api/modules/statement.html#While) | ||
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| ```ts | ||
| const { | ||
| Contract, | ||
| EntryPoint, | ||
| While, | ||
| SetValue, | ||
| Add, | ||
| LessThanOrEqual, | ||
| ContractStorage, | ||
| Nat, | ||
| TNat, | ||
| } = require('@tezwell/smartts-sdk'); | ||
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| const contract = new Contract() | ||
| // let <contract>.<storage> = 0; | ||
| .setStorage(Nat(0)) | ||
| .addEntrypoint( | ||
| new EntryPoint('entry_point_1') | ||
| .setInputType(TNat()) | ||
| .code((argument) => [ | ||
| // while (<contract>.<storage> <= argument) { | ||
| // <contract>.<storage> += 1; | ||
| // } | ||
| While(LessThanOrEqual(ContractStorage(), argument)).Do([ | ||
| SetValue(ContractStorage(), Add(ContractStorage(), Nat(1))), | ||
| ]), | ||
| ]), | ||
| ); | ||
| ``` |
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