Array with type map - dictionary

Question

So here is the array
parts:[map[content:Phillip,
This section pertains to terminated employees who are paid out in the year following the termination event. The way the tax law works, the tax basis for your share distribution will be based on the closing stock price the day preceding notification to the transfer agent. As such, we will distribute net shares calculating the proper withholding at fair market value the day prior to notifying the transfer agent. We will be distributing the shares reflected on your 9/30/01 statement (6,606 shares plus cash for fractional shares). If you would prefer to settle the taxes with a personal check, we can distribute gross shares. Please let me know you preference.
As you know, we are in the process of transferring recordkeeping services from NTRC to Hewitt. As such, we have a CPA, Larry Lewis, working with us to audit and set up transition files. He has become our department expert on the PSA account (much more knowledgeable than myself) and the various plan provision amendments. If you would like, we can set up a conference call with you, myself, and Larry to go over the payment methodology. Please let me know a date and time that is convenient for you.
Thanks,
Renee
-----Original Message-----
From: Allen, Phillip K.
Sent: Thursday, November 01, 2001 8:26 AM
To: Ratcliff, Renee
Subject:
Renee,
Thank you for digging in to the issue of Deferred Phantom Stock Units. It is clear that the payment will be made in shares. However, I still don't understand which date will be used to determine the value and calculate how many shares. The plan document under VII. Amount of Benefit Payments reads "The value of the shares, and resulting payment amount will be based on the closing price of Enron Corp. common stock on the January 1 before the date of payment, and such payment shall be made in shares of Enron Corp. common stock." Can you help me interpret this statement and work through the numbers on my account.
Thank you,
Phillip Allen
contentType:text/plain]]
The issue I am running into is trying to "content" I have tried things like
t := v["parts"][0].(map[string]interface{})
and that didn't work as well as a few other things that got me further down a rabbit hole.
the parts is inside of another map string interface.
This is the error that i keep getting
panic: interface conversion: interface is []interface {}, not map[string]interface {}
Here is the JSON object I am parsing.
{
"X-cc": "",
"From": "renee.ratcliff#enron.com",
"X-Folder": "\\PALLEN (Non- Privileged)\\Allen, Phillip K.\\Inbox",
"Content-Transfer-Encoding": "7bit",
"X-bcc": "", "X-Origin": "Allen-P",
"To": ["k..allen#enron.com"],
"parts": [{
"content": "Phillip,\r\n\r\nThis section pertains to terminated employees who are paid out in the year following the termination event. The way the tax law works, the tax basis for your share distribution will be based on the closing stock price the day preceding notification to the transfer agent. As such, we will distribute net shares calculating the proper withholding at fair market value the day prior to notifying the transfer agent. We will be distributing the shares reflected on your 9/30/01 statement (6,606 shares plus cash for fractional shares). If you would prefer to settle the taxes with a personal check, we can distribute gross shares. Please let me know you preference.\r\n\r\nAs you know, we are in the process of transferring recordkeeping services from NTRC to Hewitt. As such, we have a CPA, Larry Lewis, working with us to audit and set up transition files. He has become our department expert on the PSA account (much more knowledgeable than myself) and the various plan provision amendments. If you would like, we can set up a conference call with you, myself, and Larry to go over the payment methodology. Please let me know a date and time that is convenient for you.\r\n\r\nThanks,\r\n\r\nRenee\r\n\r\n -----Original Message-----\r\nFrom: \tAllen, Phillip K. \r\nSent:\tThursday, November 01, 2001 8:26 AM\r\nTo:\tRatcliff, Renee\r\nSubject:\t\r\n\r\nRenee,\r\n\r\nThank you for digging in to the issue of Deferred Phantom Stock Units. It is clear that the payment will be made in shares. However, I still don't understand which date will be used to determine the value and calculate how many shares. The plan document under VII. Amount of Benefit Payments reads \"The value of the shares, and resulting payment amount will be based on the closing price of Enron Corp. common stock on the January 1 before the date of payment, and such payment shall be made in shares of Enron Corp. common stock.\" Can you help me interpret this statement and work through the numbers on my account.\r\n\r\nThank you,\r\n\r\nPhillip Allen\r\n\r\n",
"contentType": "text/plain"}],
"X-FileName": "PALLEN (Non-Privileged).pst",
"Mime-Version": "1.0",
"X-From": "Ratcliff, Renee </O=ENRON/OU=NA/CN=RECIPIENTS/CN=RRATCLI>",
"Date": {"$date": 1004725111000},
"X-To": "Allen, Phillip K. </O=ENRON/OU=NA/CN=RECIPIENTS/CN=Pallen>",
"Message-ID": "<19495537.1075862165839.JavaMail.evans#thyme>",
"Content-Type": "text/plain; charset=us-ascii", "Subject": "RE:"
}
Here is the code.
http://play.golang.org/p/rJPTjvoM_t

Answer 1

Please post an actual example of what you have tried and what you are trying to do.
arrays of maps and maps of array behave like any other types.
In your example, it looks like you want a map[string][]map[string]interface{} but you have map[string][]interface{} with the content of your interface being an []interface{}
Here are some example of use of maps/interface/array/slices + a the failure that you shown. (http://play.golang.org/p/gmH_nVPppx)
package main
import "fmt"
type Content struct {
name string
}
func main() {
arrayOfMap := [2]map[string]Content{
{"part1": {name: "Philip"}},
{"part2": {name: "John"}},
}
fmt.Printf("%s\n", arrayOfMap[0]["part1"].name)
mapOfArray := map[string][2]Content{
"parts": {
{name: "Philip"},
{name: "John"},
},
}
fmt.Printf("%s\n", mapOfArray["parts"][0].name)
mapOfArrayOfMap := map[string][2]map[string]Content{
"parts": {
{"subpart": Content{name: "Philips"}},
},
}
fmt.Printf("%s\n", mapOfArrayOfMap["parts"][0]["subpart"].name)
mapOfArrayOfInterface := map[string][2]interface{}{
"parts": {
map[string]interface{}{"content": Content{name: "Philips"}},
},
}
fmt.Printf("%s\n", mapOfArrayOfInterface["parts"][0].(map[string]interface{})["content"].(Content).name)
mapOfArrayOfSliceInterface := map[string][2][]interface{}{
"parts": {
{
map[string]interface{}{
"content": Content{name: "Philips"},
},
},
},
}
fmt.Printf("%s\n", mapOfArrayOfSliceInterface["parts"][0][0].(map[string]interface{})["content"].(Content).name)
v := map[string][]interface{}{
"parts": []interface{}{
0: []interface{}{nil},
},
}
// This will fail as shown in the given example.
fmt.Printf("%s\n", v["parts"][0].(map[string]interface{}))
}

Answer 2

Ok so after taking numerous things from the comments above... I want to say what #creack had was the closest thing to being able to get the value of "content" from the multi dimensional interface type is the link below.
http://play.golang.org/p/urBQ8NxSo8