Created
September 1, 2016 23:45
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Javascript hash normalize
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| var response={ | |
| authors:[ | |
| { | |
| id: 1, | |
| name: "Monica", | |
| posts: [ | |
| { | |
| id: 1, | |
| title: "how to write fast js", | |
| comments:[ | |
| {id:1, | |
| text: "fast js is really fast" | |
| }, | |
| {id:2, | |
| text: "fast js is not bad" | |
| } | |
| ] | |
| }, | |
| { | |
| id: 2, | |
| title: "how to write slow js", | |
| comments:[ | |
| { | |
| id:3, | |
| text: "it is too slow" | |
| } | |
| ] | |
| } | |
| ] | |
| }, | |
| { | |
| id: 2, | |
| name: "John", | |
| posts: [ | |
| { | |
| id: 2, | |
| title: "how to write slow js", | |
| comments:[ | |
| { | |
| id:3, | |
| text: "it is too slow" | |
| } | |
| ] | |
| } | |
| ] | |
| } | |
| ] | |
| } | |
| function normalize(parent, object){ | |
| var keys = Object.keys(object); | |
| //iterate through keys | |
| keys.forEach(function(key){ | |
| //if value is array, create a array in result variable | |
| if(Array.isArray(object[key])){ | |
| if(!result[key]) result[key] = []; | |
| // add each item to the | |
| object[key].forEach(function(child, i){ | |
| if(!result[key].find(function(item){return item.id === child.id})){ | |
| if(parent) child[parent+"_id"] = object.id; | |
| result[key].push(child); | |
| } | |
| // **** recursion ****// | |
| normalize(singular(key), child); | |
| }); | |
| delete object[key]; | |
| } | |
| }); | |
| } | |
| function singular(str){ | |
| return str.replace(/[s]$/i, ""); | |
| } | |
| var result = {}; | |
| normalize("", response); | |
| console.log(result); | |
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