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odsantos wants to merge6 commits intojavascript-tutorial:masterfromodsantos:update-strings
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4 changes: 2 additions & 2 deletions1-js/05-data-types/03-string/1-ucfirst/_js.view/test.js
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describe("ucFirst", function() {
it('Uppercases the first symbol', function() {
it('Transforma o primeiro símbolo em maiúsculas', function() {
assert.strictEqual(ucFirst("john"), "John");
});

it("Doesn't die on an emptystring", function() {
it("Não aborta numastring vazia", function() {
assert.strictEqual(ucFirst(""), "");
});
});
16 changes: 8 additions & 8 deletions1-js/05-data-types/03-string/1-ucfirst/solution.md
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We can't "replace" the first character, becausestrings in JavaScriptare immutable.
Não podemos "substituir" o primeiro caractere, porque *strings* em JavaScriptsão imutáveis.

But we can make a newstring based on the existing one, with the uppercased first character:
Mas podemos criar uma nova *string* com base na existente, com o primeiro caractere em maiúsculas:

```js
let newStr = str[0].toUpperCase() + str.slice(1);
```

There's a small problem though. If `str`is empty, then `str[0]`isundefined, so we'll get an error.
Contudo, há um pequeno problema. Se `str`estiver vazia, então `str[0]`será `undefined`, e como `undefined` não possui o método `toUpperCase()`, recebemos um erro.

There are two variants here:
Existem aqui duas variantes:

1. Use `str.charAt(0)`,as it always returns astring (maybe empty).
2.Add a test for an emptystring.
1. Use `str.charAt(0)`,porque sempre retorna uma *string* (ainda que vazia).
2.Adicione um teste por uma *string* vazia.

Here's the 2nd variant:
Aqui está a segunda variante:

```js run
```js run demo
function ucFirst(str) {
if (!str) return str;

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4 changes: 2 additions & 2 deletions1-js/05-data-types/03-string/1-ucfirst/task.md
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Expand Up@@ -2,9 +2,9 @@ importance: 5

---

#Uppercast the first character
#Transforme o primeiro caractere em maiúsculas

Write a function `ucFirst(str)`that returns thestring `str`with the uppercased first character, for instance:
Escreva uma função `ucFirst(str)`que retorne a *string* `str`com o primeiro caractere em maiúsculas, por exemplo:

```js
ucFirst("john") == "John";
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12 changes: 6 additions & 6 deletions1-js/05-data-types/03-string/2-check-spam/_js.view/test.js
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describe("checkSpam", function() {
it('finds spamin "buy ViAgRAnow"', function() {
assert.isTrue(checkSpam('buy ViAgRAnow'));
it('encontra spamem "compre ViAgRAagora"', function() {
assert.isTrue(checkSpam('compre ViAgRAagora'));
});

it('finds spamin "freexxxxx"', function() {
assert.isTrue(checkSpam('freexxxxx'));
it('encontra spamem "xxxxx grátis"', function() {
assert.isTrue(checkSpam('xxxxx grátis'));
});

it('no spamin "innocent rabbit"', function() {
assert.isFalse(checkSpam('innocent rabbit'));
it('nenhum spamem "coelhinha inocente"', function() {
assert.isFalse(checkSpam('coelhinha inocente'));
});
});
8 changes: 4 additions & 4 deletions1-js/05-data-types/03-string/2-check-spam/solution.md
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To make the searchcase-insensitive, let's bring thestring to lower case and then search:
Para fazer a pesquisa insensível ao caso (*case-insensitive*), vamos transformar a *string* em minúsculas e a seguir pesquisar:

```js run
function checkSpam(str) {
Expand All@@ -7,8 +7,8 @@ function checkSpam(str) {
return lowerStr.includes('viagra') || lowerStr.includes('xxx');
}

alert( checkSpam('buy ViAgRAnow') );
alert( checkSpam('freexxxxx') );
alert( checkSpam("innocent rabbit") );
alert( checkSpam('compre ViAgRAagora') );
alert( checkSpam('xxxxx grátis') );
alert( checkSpam("coelhinha inocente") );
```

12 changes: 6 additions & 6 deletions1-js/05-data-types/03-string/2-check-spam/task.md
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---

#Check for spam
#Procure por spam

Write a function `checkSpam(str)`that returns `true`if `str`contains 'viagra'or 'XXX',otherwise`false.
Escreva uma função `checkSpam(str)`que retorne `true`se `str`contiver 'viagra'ou 'XXX',e em caso contrário retorne`false`.

The function must becase-insensitive:
A função deve ser insensível ao caso (*case-insensitive* - não sensível a maiúsculas/minúsculas):

```js
checkSpam('buy ViAgRAnow') == true
checkSpam('freexxxxx') == true
checkSpam("innocent rabbit") == false
checkSpam('compre ViAgRAagora') == true
checkSpam('xxxxx grátis') == true
checkSpam("coelhinha inocente") == false
```

12 changes: 6 additions & 6 deletions1-js/05-data-types/03-string/3-truncate/_js.view/test.js
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describe("truncate", function() {
it("truncate the longstringto the given length (including the ellipsis)", function() {
it("trunque astringlonga para o comprimento dado (incluindo as reticências)", function() {
assert.equal(
truncate("What I'd like to tell on this topic is:", 20),
"What I'd like to te…"
truncate("O que eu gostaria de dizer neste tópico é:", 20),
"O que eu gostaria d…"
);
});

it("doesn't change shortstrings", function() {
it("não alterastrings curtas", function() {
assert.equal(
truncate("Hi everyone!", 20),
"Hi everyone!"
truncate("Olá a todos!", 20),
"Olá a todos!"
);
});

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4 changes: 2 additions & 2 deletions1-js/05-data-types/03-string/3-truncate/solution.md
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The maximal length must be `maxlength`,so we need to cut it a little shorter, to give space for the ellipsis.
O comprimento máximo deve ser `maxlength`,portanto precisamos de a cortar um pouco antes, para dar espaço às reticências.

Notethat there is actually a single Unicode character for an ellipsis. That's not three dots.
Noteque realmente existe um caractere *unicode* único para as reticências. Não são três pontos.

```js run demo
function truncate(str, maxlength) {
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12 changes: 6 additions & 6 deletions1-js/05-data-types/03-string/3-truncate/task.md
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Expand Up@@ -2,16 +2,16 @@ importance: 5

---

#Truncate the text
#Trunque o texto

Create a function `truncate(str, maxlength)`that checks the length of the`str`and, if it exceeds `maxlength` --replaces the end of `str`with the ellipsis character`"…"`,to make its length equal to `maxlength`.
Crie uma função `truncate(str, maxlength)`que verifique o comprimento de`str`e, se exceder a `maxlength` --substitua o final de `str`pelo caractere reticências`"…"`,afim de tornar o seu comprimento igual a `maxlength`.

The result of the function should be the truncated (if needed) string.
O resultado da função deverá ser a *string* truncada (se necessário).

For instance:
Por exemplo:

```js
truncate("What I'd like to tell on this topic is:", 20) = "What I'd like to te…"
truncate("O que eu gostaria de dizer neste tópico é:", 20) = "O que eu gostaria d…"

truncate("Hi everyone!", 20) = "Hi everyone!"
truncate("Olá a todos!", 20) = "Olá a todos!"
```
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describe("extractCurrencyValue", function() {

it("for the string $120returns the number 120", function() {
it("para a string $120retorne o número 120", function() {
assert.strictEqual(extractCurrencyValue('$120'), 120);
});

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8 changes: 4 additions & 4 deletions1-js/05-data-types/03-string/4-extract-currency/task.md
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---

#Extract the money
#Extraia o valor monetário

We have a cost in the form`"$120"`.That is: the dollar sign goes first, and then the number.
Temos um custo na forma`"$120"`.Isto é: o sinal de dólar vem primeiro, e a seguir o número.

Create a function `extractCurrencyValue(str)`that would extract the numeric value from suchstring and return it.
Crie uma função `extractCurrencyValue(str)`que faça a extração do valor numérico dessa *string* e o retorne.

The example:
O exemplo:

```js
alert( extractCurrencyValue('$120') === 120 ); // true
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