玩法2.3:如何统计json个子节点?
Play 2.3: How to count json child nodes?
我有这个json:
{
"errors": {
"password": [
"This field is required"
],
"email": [
"This field is required"
]
}
}
如何统计"errors"节点下的子节点?
var a = {
"errors": {
"password": [
"This field is required"
],
"email": [
"This field is required"
]
}
};
Object.keys(a.errors).length;
一种方法,你可以这样做:
import play.api.libs.json.{JsObject, Json}
val errors = """{"errors":{"password":["This field is required"],"email":["This field is required"]}}"""
val errorsCount = Json.parse(errors).
asOpt[JsObject].
flatMap(json => (json \ "errors").asOpt[JsObject]).
map(json => json.fields.size).getOrElse(0)
我有这个json:
{
"errors": {
"password": [
"This field is required"
],
"email": [
"This field is required"
]
}
}
如何统计"errors"节点下的子节点?
var a = {
"errors": {
"password": [
"This field is required"
],
"email": [
"This field is required"
]
}
};
Object.keys(a.errors).length;
一种方法,你可以这样做:
import play.api.libs.json.{JsObject, Json}
val errors = """{"errors":{"password":["This field is required"],"email":["This field is required"]}}"""
val errorsCount = Json.parse(errors).
asOpt[JsObject].
flatMap(json => (json \ "errors").asOpt[JsObject]).
map(json => json.fields.size).getOrElse(0)