TypeError: Cannot read property 'forEach' of undefined , javascript

Question

trying to go through a dictionary and get values and get each of the array values in it to manipluate them but get this error, at first I thought it might be because I forgot the semi-colon at the line that defines the dict but the error stays.



 getPieChartSeries(logsList){
   let devidedLogs = this.divideLogsByExitCode(logsList);
   console.log(devidedLogs);
   let pieChartSeries = [];
   Object.values(devidedLogs).array.forEach(element => {
     pieChartSeries.push(this.getPrecentageOfLogType(element,logsList))
   });
   console.log(pieChartSeries)
 }

 getPrecentageOfLogType(logsList,logsOfTypeList){
   let numOflogs = logsList.length
   let numOflogsOfType = logsOfTypeList.length
   let precentageOfLogType = Math.round((numOflogsOfType  / numOflogs ) * 100)

   return precentageOfLogType
 }
 getCurrentTime(){
   var d = new Date();
   return d.toLocaleString()
 }

devidedLogs is



{failedFaults: Array(0), failedProbesLogs: Array(1), failedRollbackLogs: Array(0), rollbackedLogs: Array(0), selfHealedLogs: Array(3)}failedFaults: []failedProbesLogs: [{…}]failedRollbackLogs: []rollbackedLogs: []selfHealedLogs: (3) [{…}, {…}, {…}]__proto__: Object

{failedFaults: Array(0), failedProbesLogs: Array(1), failedRollbackLogs: Array(0), rollbackedLogs: Array(0), selfHealedLogs: Array(3)} — amos-baron
– amos-baron, Commented Jun 18, 2020 at 12:49
But you don't have array property inside your devidedLogs object — demkovych
– demkovych, Commented Jun 18, 2020 at 12:52
Each one of the values in the devidedLogs dict is an array (0 so when I go through the values of it i can do .array to each of one them — amos-baron
– amos-baron, Commented Jun 18, 2020 at 12:55

Minal Shah · Accepted Answer · 2020-06-18 13:01:28Z

3

I think you are iterating on the wrong variable.

Already .values() return the array, you don't have to add .array again after that.

So your code should be updated to the below lines:

getPieChartSeries(logsList){
 let devidedLogs = this.divideLogsByExitCode(logsList);
 console.log(devidedLogs);
 let pieChartSeries = [];
 Object.values(devidedLogs).forEach(element => {
 pieChartSeries.push(this.getPrecentageOfLogType(element,logsList))
 });
 console.log(pieChartSeries)
}

answered Jun 18, 2020 at 13:01

Minal Shah

1,4861 gold badge7 silver badges13 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Caro · Accepted Answer · 2020-06-18 13:05:28Z

0

Object.values(devidedLogs) will return an Array of all Object values, equivalently, you can use Object.keys(devidedLogs) to obtain the keys or Object.entries(devidedLogs) for an Array of key-value tuples.

Check also the docs of the Object class :)

answered Jun 18, 2020 at 13:05

Caro

11 bronze badge

1 Comment

Minal Shah Over a year ago

By fetching keys, we would again need to parse the keys and get the values in front of each key. Because as per the requirement we need the values of the logs.

Collectives™ on Stack Overflow

TypeError: Cannot read property 'forEach' of undefined , javascript

2 Answers 2

Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related