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export-mike/maps.go

Created June 25, 2021 06:56
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  1. export-mike created this gist Jun 25, 2021.
    87 changes: 87 additions & 0 deletions maps.go
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,87 @@
    package main

    import (
    // "bytes"
    "fmt"
    )

    func main() {
    type Mapping struct {
    symbol string
    exchange string
    }
    currentMappings := []Mapping{
    {
    symbol: "NOVN",
    exchange: "EBS",
    },
    {
    symbol: "NOVN",
    exchange: "EBS",
    },
    {
    symbol: "NOVN",
    exchange: "VIRTX",
    },
    {
    symbol: "NOVNz",
    exchange: "VIRTX",
    },
    }
    fmt.Println("current ", currentMappings)
    stringKeyMapping := make(map[string]string)
    for _, mapping := range currentMappings {
    stringKeyMapping[mapping.symbol] = mapping.exchange
    }
    structKeyMapping := make(map[Mapping]Mapping)
    for _, mapping := range currentMappings {
    structKeyMapping[mapping] = mapping
    }

    incomingMappings := []Mapping{
    {
    symbol: "NOVN",
    exchange: "EBS",
    },
    {
    symbol: "NOVN",
    exchange: "EBS",
    },
    {
    symbol: "NOVN",
    exchange: "VIRTX",
    },
    {
    symbol: "NOVNz",
    exchange: "VIRTX",
    },
    {
    symbol: "NVS",
    exchange: "NYSE",
    },
    }

    fmt.Println("incoming", incomingMappings)

    var deduplicated []Mapping
    for _, mapping := range incomingMappings {
    val, ok := stringKeyMapping[mapping.symbol]
    if ok && val == mapping.exchange {
    continue
    }
    fmt.Println(fmt.Sprintf("val (%v), ok(%v) := stringKeyMapping[%v]; ok && val == %v", val, ok, mapping.symbol, mapping.exchange))

    deduplicated = append(deduplicated, mapping)
    }
    fmt.Println("string key method deduplicated", deduplicated)
    fmt.Println("struct key map", structKeyMapping)
    var structKeyDeduplicated []Mapping
    for _, mapping := range incomingMappings {
    if _, ok := structKeyMapping[mapping]; ok {
    continue
    }
    structKeyDeduplicated = append(structKeyDeduplicated, mapping)
    }
    fmt.Println("struct key method deduplicated", structKeyDeduplicated)

    }