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---
id: a10d2431ad0c6a099a4b8b52
title: Everything Be True
isRequired: true
challengeType: 5
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videoUrl: ''
localeTitle: Todo sea verdad
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---
## Description
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< section id = "description" > Compruebe si el predicado (segundo argumento) es < dfn > verdadero< / dfn > en todos los elementos de una colección (primer argumento). En otras palabras, se le da una colección de objetos de matriz. El predicado < code > pre< / code > será una propiedad de objeto y debe devolver < code > true< / code > si su valor es < code > truthy< / code > . De lo contrario, devuelve < code > false< / code > . En JavaScript, los valores de < code > truthy< / code > son valores que se convierten en < code > true< / code > cuando se evalúan en un contexto booleano. Recuerde, puede acceder a las propiedades del objeto a través de la notación de puntos o la notación < code > []< / code > . Recuerda usar < a href = "http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514" target = "_blank" > Read-Search-Ask< / a > si te atascas. Trate de emparejar el programa. Escribe tu propio código. < / section >
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## Instructions
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< section id = "instructions" >
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< / section >
## Tests
< section id = 'tests' >
```yml
tests:
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- text: '< code > truthCheck([{" user" : " Tinky-Winky" , " sex" : " male" }, {" user" : " Dipsy" , " sex" : " male" }, {" user" : " Laa-Laa" , " sex" : " female" }, {" user" : " Po" , " sex" : " female" }], " sex" )</ code > debe devolver el valor verdadero.'
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testString: 'assert.strictEqual(truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex"), true, "< code > truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex")< / code > should return true.");'
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- text: '< code > truthCheck([{" user" : " Tinky-Winky" , " sex" : " male" }, {" user" : " Dipsy" }, {" user" : " Laa-Laa" , " sex" : " female" }, {" user" : " Po" , " sex" : " female" }], " sex" )</ code > debe devolver falso.'
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testString: 'assert.strictEqual(truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex"), false, "< code > truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex")< / code > should return false.");'
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- text: '< code > truthCheck([{" user" : " Tinky-Winky" , " sex" : " male" , " age" : 0}, {" user" : " Dipsy" , " sex" : " male" , " age" : 3}, {" user" : " Laa-Laa" , " sex" : " female" , " age" : 5}, {" user" : " Po" , " sex" : " female" , " age" : 4}], " age" )</ code > debe devolver falso.'
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testString: 'assert.strictEqual(truthCheck([{"user": "Tinky-Winky", "sex": "male", "age": 2}, {"user": "Dipsy", "sex": "male", "age": 0}, {"user": "Laa-Laa", "sex": "female", "age": 5}, {"user": "Po", "sex": "female", "age": 4}], "age"), false, "< code > truthCheck([{"user": "Tinky-Winky", "sex": "male", "age": 0}, {"user": "Dipsy", "sex": "male", "age": 3}, {"user": "Laa-Laa", "sex": "female", "age": 5}, {"user": "Po", "sex": "female", "age": 4}], "age")< / code > should return false.");'
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- text: '< code > truthCheck([{" name" : " Pete" , " onBoat" : true}, {" name" : " Repeat" , " onBoat" : true}, {" name" : " FastFoward" , " onBoat" : null}], " onBoat" )</ code > debe devolver falso'
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testString: 'assert.strictEqual(truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true}, {"name": "FastFoward", "onBoat": null}], "onBoat"), false, "< code > truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true}, {"name": "FastFoward", "onBoat": null}], "onBoat")< / code > should return false");'
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- text: '< code > truthCheck([{" name" : " Pete" , " onBoat" : true}, {" name" : " Repeat" , " onBoat" : true, " alias" : " Repete" }, {" name" : " FastFoward" , " onBoat" : true}], " onBoat" )</ code > debe devolver true'
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testString: 'assert.strictEqual(truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true, "alias": "Repete"}, {"name": "FastFoward", "onBoat": true}], "onBoat"), true, "< code > truthCheck([{"name": "Pete", "onBoat": true}, {"name": "Repeat", "onBoat": true, "alias": "Repete"}, {"name": "FastFoward", "onBoat": true}], "onBoat")< / code > should return true");'
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- text: '< code > truthCheck([{" single" : " yes" }], " single" )</ code > debe devolver verdadero'
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testString: 'assert.strictEqual(truthCheck([{"single": "yes"}], "single"), true, "< code > truthCheck([{"single": "yes"}], "single")< / code > should return true");'
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- text: '< code > truthCheck([{" single" : "" }, {" single" : " double" }], " single" )</ code > debe devolver falso'
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testString: 'assert.strictEqual(truthCheck([{"single": ""}, {"single": "double"}], "single"), false, "< code > truthCheck([{"single": ""}, {"single": "double"}], "single")< / code > should return false");'
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- text: '< code > truthCheck([{" single" : " double" }, {" single" : undefined}], " single" )</ code > debe devolver falso'
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testString: 'assert.strictEqual(truthCheck([{"single": "double"}, {"single": undefined}], "single"), false, "< code > truthCheck([{"single": "double"}, {"single": undefined}], "single")< / code > should return false");'
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- text: '< code > truthCheck([{" single" : " double" }, {" single" : NaN}], " single" )</ code > debe devolver falso'
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testString: 'assert.strictEqual(truthCheck([{"single": "double"}, {"single": NaN}], "single"), false, "< code > truthCheck([{"single": "double"}, {"single": NaN}], "single")< / code > should return false");'
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```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'js-seed' >
```js
function truthCheck(collection, pre) {
// Is everyone being true?
return pre;
}
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truthCheck([{"user": "Tinky-Winky", "sex": "male"}, {"user": "Dipsy", "sex": "male"}, {"user": "Laa-Laa", "sex": "female"}, {"user": "Po", "sex": "female"}], "sex");
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```
< / div >
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< / section >
## Solution
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< section id = 'solution' >
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```js
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// solution required
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```
< / section >