Javascript 使用 lodash 检查对象中是否存在键
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check if key exists in object with lodash
提问by Leonel Matias Domingos
I need help with lodash cause i dont understand functional programming and lodash is very helpfull with object/arrays operations.
我需要 lodash 的帮助，因为我不懂函数式编程，而 lodash 对对象/数组操作非常有帮助。
I need to search objects inside object and return true if key exists. I've setup a jsfiddle. Apreciate your help.
我需要搜索对象内的对象，如果键存在则返回 true。我已经设置了一个 jsfiddle。感谢您的帮助。
var dependsOn={
"Cadastro": {
"RHID": "RHID"
},
"Agregados":{
"CD_DOC":"CD_DOC"
}
"Documentos":{
"RHID":"CD_DOC"
}
}
var field='RHID'
alert(_.contains(_.keys(dependsOn), field))
回答by Fawad Mukhtar
Try this. it's simple
尝试这个。这很简单
_.has(dependsOn, field)
it returns true if the RHIDkey exist in dependsOn. in above case it returns false
如果RHID密钥存在于dependsOn，则返回true 。在上述情况下，它返回 false
回答by Narendra CM
try this
尝试这个
var dependsOn={
"Cadastro": {
"RHID": "RHID"
},
"Agregados":{
"CD_DOC":"CD_DOC"
},
"Documentos":{
"RHID":"CD_DOC"
}
}
var field='RHID'
alert(_.some(dependsOn, function(o) { return _.has(o, field); }));
Updated your fiddle: https://jsfiddle.net/88gwp87k/1/
更新了你的小提琴：https: //jsfiddle.net/88gwp87k/1/
回答by stasovlas
_.chain(dependsOn).findKey(field).isString().value();
