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¿Cómo asignar e iterar solo una vez sobre la matriz?

Siéntase libre de marcar esta pregunta si se trata de un duplicado y siéntase libre de reformular el título si tiene un título mejor. No sabía cómo redactar el título. Tengo 2 arreglos diferentes. La primera matriz contiene un conjunto de usuarios y la segunda matriz contiene un conjunto de avatares. Es importante mencionar que la matriz de avatares siempre será más grande que los usuarios. Necesito emparejar solo un avatar por usuario. Cada usuario no debe tener el mismo avatar y cada avatar debe coincidir con el género del usuario. ¿Cómo puedo conseguir esto?

 avatars = [ { "id" : 1, "image" : "maleavatar1", "gender": "male" }, { "id" : 2, "image" : "maleavatar2", "gender": "male" }, { "id" : 3, "image" : "maleavatar3", "gender": "male" }, { "id" : 4, "image" : "femaleavatar1", "gender": "female" }, { "id" : 5, "image" : "femaleavatar2", "gender": "female" }, { "id" : 6, "image" : "femaleavatar3", "gender": "female" }, { "id" : 7, "image" : "femaleavatar4", "gender": "female" }, ] users = [ { "id" : 1, "name" : "Manila", "gender": "female" }, { "id" : 2, "name" : "Josy", "gender": "female" }, { "id" : 3, "name" : "Eliza", "gender": "female" }, { "id" : 4, "name" : "Martin", "gender": "male" }, { "id" : 5, "name" : "Mark", "gender": "male" }, { "id" : 6, "name" : "John", "gender": "male" } ] var count = 0; var randUser = ''; var randos = []; var b_s = users.length; var a_s = avatars.length; users.forEach(function(user){count++ avatars.forEach(function(avatar){ if(avatar.gender === user.gender){ randUser = { "name" : user.name, "avatar" : avatar.image, "gender" : user.gender } //push users randos.push(randUser); } }) }) console.log(randos);

about 4 years ago · Juan Pablo Isaza
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Es una buena práctica, cuando escuchas "aleatorio sin duplicados", pensar en "mezclar".

Entonces, para asignar avatares aleatorios, que no se repitan y con el género correcto, separe los avatares por género, mezcle los avatares masculinos y femeninos y luego asígnelos secuencialmente a los usuarios...

 const avatars = getAvatars(); // just to move the data to the bottom of the snippet const users = getUsers(); const shuffledMales = shuffle(avatars.filter(a => a.gender==="male")); const shuffledFemales = shuffle(avatars.filter(a => a.gender==="female")); let maleIndex = 0, femaleIndex = 0; users.forEach(user => { user.avatar = user.gender === "male" ? shuffledMales[maleIndex++] : shuffledFemales[femaleIndex++]; }); console.log(users); // fisher-yates shuffle, adapted from https://bost.ocks.org/mike/shuffle/ function shuffle(array) { let copy = [], n = array.length, i; while (n) { let i = Math.floor(Math.random() * array.length); if (i in array) { copy.push(array[i]); delete array[i]; n--; } } return copy; } function getAvatars() { return [{ "id": 1, "image": "maleavatar1", "gender": "male" }, { "id": 2, "image": "maleavatar2", "gender": "male" }, { "id": 3, "image": "maleavatar3", "gender": "male" }, { "id": 4, "image": "femaleavatar1", "gender": "female" }, { "id": 5, "image": "femaleavatar2", "gender": "female" }, { "id": 6, "image": "femaleavatar3", "gender": "female" }, { "id": 7, "image": "femaleavatar4", "gender": "female" }, ]; } function getUsers() { return [{ "id": 1, "name": "Manila", "gender": "female" }, { "id": 2, "name": "Josy", "gender": "female" }, { "id": 3, "name": "Eliza", "gender": "female" }, { "id": 4, "name": "Martin", "gender": "male" }, { "id": 5, "name": "Mark", "gender": "male" }, { "id": 6, "name": "John", "gender": "male" } ]; }

about 4 years ago · Juan Pablo Isaza Report
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