Fe-interview: [js] 第339天 写个方法近似计算指定数组或对象占用内存的大小
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js
function sizeOfObject(obj)){
if(object == null){
return 0
}
var bytes = 0
for (var key in obj) {
if (!Object.hasOwnProperty.call(obj, key)) {
continue
}
bytes += sizeof(key)
try {
bytes += sizeof(obj[key])
} catch (ex) {
if (ex instanceof RangeError) {
bytes = 0
}
}
}
return bytes
}
function sizeOf(obj){
var objType = typeof obj
switch(objType){
case 'string':
return obj.length*3;
case 'boolean'
return 1;
case 'number':
return 8;
case 'object':
if(Array.isArray(obj)){
return obj.map(sizeOf).reduce(acc,curr)=>acc+curr,0)
}else{
return sizeOfObject(obj)
}
default:
return 0
}
}
longhui520
on 20 Mar 2020
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Most helpful comment
js function sizeOfObject(obj)){ if(object == null){ return 0 } var bytes = 0 for (var key in obj) { if (!Object.hasOwnProperty.call(obj, key)) { continue } bytes += sizeof(key) try { bytes += sizeof(obj[key]) } catch (ex) { if (ex instanceof RangeError) { bytes = 0 } } } return bytes } function sizeOf(obj){ var objType = typeof obj switch(objType){ case 'string': return obj.length*3; case 'boolean' return 1; case 'number': return 8; case 'object': if(Array.isArray(obj)){ return obj.map(sizeOf).reduce(acc,curr)=>acc+curr,0) }else{ return sizeOfObject(obj) } default: return 0 } }