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‎.DS_Store‎

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‎.gitignore‎

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node_modules/*

‎1 - tipagem avancada/exemplo1.ipynb‎

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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"O **Tipo de Afirmação** ou **type assertion** nos permite informar ao compilador o tipo da variavel."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"16\n"
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]
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}
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],
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"source": [
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"let valorInicial: any = \"this is a string\";\n",
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"\n",
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"let strLength: number = (valorInicial as string).length;\n",
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"\n",
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"console.log(strLength); "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"16\n"
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]
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}
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],
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"source": [
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"let valorInicial: any = \"this is a string\";\n",
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"\n",
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"let strLength: number = (<string>valorInicial).length;\n",
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"\n",
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"console.log(strLength); "
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Deno",
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"language": "typescript",
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"name": "deno"
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},
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"language_info": {
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"codemirror_mode": "typescript",
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"file_extension": ".ts",
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"mimetype": "text/x.typescript",
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"name": "typescript",
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"nbconvert_exporter": "script",
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"pygments_lexer": "typescript",
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"version": "5.5.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

‎1 - tipagem avancada/exemplo2.ipynb‎

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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Os **Guardas de Tipos** (type guards) são uma maneira de definir uma função ou método que verifica se uma variável é de um determinado tipo. "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": [
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"function isString(param: any): value is string {\n",
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" return typeof param === \"string\";\n",
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"}\n",
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"\n",
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"function example(value: any) {\n",
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" if (isString(value)) {\n",
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" console.log(`é uma string`);\n",
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" } else {\n",
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" console.log(\"não é uma string\");\n",
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" }\n",
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"}\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"não é uma string\n"
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]
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}
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],
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"source": [
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"example(18); "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"não é uma string\n"
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]
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}
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],
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"source": [
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"example(39);"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"interface Bird {\n",
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" fly(): void;\n",
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"}\n",
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"\n",
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"interface Fish {\n",
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" swim(): void;\n",
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"}"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 5,
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"metadata": {},
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"outputs": [],
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"source": [
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"function isBird(animal: any): animal is Bird {\n",
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" return (animal as Bird).fly !== undefined;\n",
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"}\n",
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"\n",
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"function example(animal: Bird | Fish) {\n",
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" if (isBird(animal)) {\n",
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" animal.fly();\n",
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" } else {\n",
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" animal.swim();\n",
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" }\n",
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"}"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Os guardas de tipos são extremamente úteis para garantir a segurança de tipos em TypeScript"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 9,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Salmon is swimming\n"
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]
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}
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],
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"source": [
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"class Salmon implements Fish {\n",
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" swim() {\n",
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" console.log(\"Salmon is swimming\");\n",
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" }\n",
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" }\n",
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"\n",
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"const salmon = new Salmon();\n",
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"example(salmon)\n"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Deno",
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"language": "typescript",
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"name": "deno"
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},
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"language_info": {
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"codemirror_mode": "typescript",
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"file_extension": ".ts",
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"mimetype": "text/x.typescript",
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"name": "typescript",
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"nbconvert_exporter": "script",
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"pygments_lexer": "typescript",
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"version": "5.5.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

‎1 - tipagem avancada/exemplo3.ipynb‎

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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"O tipo **índice** (index type) é usado para definir um tipo que pode ser acessado usando uma chave (indexador). \n"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"Vamos criar um exemplo que permite que qualquer chave de string seja usada, com valores de string correspondentes."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 1,
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"metadata": {},
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"outputs": [],
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"source": [
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"interface TranslationDictionary {\n",
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" [key: string]: string;\n",
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"}\n",
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"\n",
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"let translations: TranslationDictionary = {\n",
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" en: \"Hello\",\n",
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" pt: \"Olá\",\n",
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" fr: \"Bonjour\",\n",
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" es: \"Hola\"\n",
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"};"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Hello\n"
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]
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}
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],
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"source": [
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"console.log(translations['en']); "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Olá\n"
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]
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}
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],
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"source": [
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"console.log(translations['pt']);"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Deno",
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"language": "typescript",
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"name": "deno"
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},
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"language_info": {
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"codemirror_mode": "typescript",
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"file_extension": ".ts",
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"mimetype": "text/x.typescript",
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"name": "typescript",
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"nbconvert_exporter": "script",
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"pygments_lexer": "typescript",
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"version": "5.5.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

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