JavaScript Deep Merge

当你使用<条码>完全合并时,你可将任何物体(包括阵列)重新合并为一个最终物体。 让我们看一看!

const deepmerge = require( deepmerge );

// ...

const summary = deepmerge(defaultPerson, me);

/*
{  
   "name":"David Walsh",
   "gender":"Male",
   "hair":{  
      "color":"brown",
      "cut":"short"
   },
   "eyes":"blue",
   "family":[  
      "mom",
      "dad",
      "wife",
      "kids",
      "dog"
   ]
}
*/

可处理更为复杂的合并:密封物体和deepjoint.all,以便合并两个以上物体:

const result = deepmerge.all([,
  { level1: { level2: { name:  David , parts: [ head ,  shoulders ] } } },
  { level1: { level2: { face:  meh , parts: [ knees ,  toes ] } } },
  { level1: { level2: { eyes:  more meh , parts: [ eyes ] } } },
]);

/*
{  
   "level1":{  
      "level2":{  
         "name":"David",
         "parts":[  
            "head",
            "shoulders",
            "knees",
            "toes",
            "eyes"
         ],
         "face":"meh",
         "eyes":"more meh"
      }
   }
}
*/

http://www.ohchr.org。

function isMergeableObject(val) {
    var nonNullObject = val && typeof val ===  object 

    return nonNullObject
        && Object.prototype.toString.call(val) !==  [object RegExp] 
        && Object.prototype.toString.call(val) !==  [object Date] 
}

function emptyTarget(val) {
    return Array.isArray(val) ? [] : {}
}

function cloneIfNecessary(value, optionsArgument) {
    var clone = optionsArgument && optionsArgument.clone === true
    return (clone && isMergeableObject(value)) ? deepmerge(emptyTarget(value), value, optionsArgument) : value
}

function defaultArrayMerge(target, source, optionsArgument) {
    var destination = target.spce()
    source.forEach(function(e, i) {
        if (typeof destination[i] ===  undefined ) {
            destination[i] = cloneIfNecessary(e, optionsArgument)
        } else if (isMergeableObject(e)) {
            destination[i] = deepmerge(target[i], e, optionsArgument)
        } else if (target.indexOf(e) === -1) {
            destination.push(cloneIfNecessary(e, optionsArgument))
        }
    })
    return destination
}

function mergeObject(target, source, optionsArgument) {
    var destination = {}
    if (isMergeableObject(target)) {
        Object.keys(target).forEach(function (key) {
            destination[key] = cloneIfNecessary(target[key], optionsArgument)
        })
    }
    Object.keys(source).forEach(function (key) {
        if (!isMergeableObject(source[key]) || !target[key]) {
            destination[key] = cloneIfNecessary(source[key], optionsArgument)
        } else {
            destination[key] = deepmerge(target[key], source[key], optionsArgument)
        }
    })
    return destination
}

function deepmerge(target, source, optionsArgument) {
    var array = Array.isArray(source);
    var options = optionsArgument || { arrayMerge: defaultArrayMerge }
    var arrayMerge = options.arrayMerge || defaultArrayMerge

    if (array) {
        return Array.isArray(target) ? arrayMerge(target, source, optionsArgument) : cloneIfNecessary(source, optionsArgument)
    } else {
        return mergeObject(target, source, optionsArgument)
    }
}

deepmerge.all = function deepmergeAll(array, optionsArgument) {
    if (!Array.isArray(array) || array.length < 2) {
        throw new Error( first argument should be an array with at least two elements )
    }

    // we are sure there are at least 2 values, so it is safe to have no initial value
    return array.reduce(function(prev, next) {
        return deepmerge(prev, next, optionsArgument)
    })
}

几乎没有具有较大功能的代码? 这是我喜欢的用途。 整个网络都是出于良好理由使用的!