i am trying to map through an array of objects to extract some value from each object.
When i run my code i am getting a result of undefined on console.log(open) but get all the data get log for the console.log(data)
Can someone tell me why is it undefined or what is wrong in my code?
thanks in advance
JavaScript
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//Data from CCompare
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CryptoCompareAPI.histoHour('BTC', 'USD')
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.then(data => {
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data = data.reverse()
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console.log(data)
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const open = data.map( d => d[3])
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console.log(open)
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tulind.indicators.sma.indicator([close],[3],(error,res) => {
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if (error) return log(error)
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console.log(res)
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})
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}
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//console.log("high",data[i].high)
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//console.log(data.length)
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})
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.catch(console.error())
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Data
JavaScript
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[{
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time: 1638356400,
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high: 57274.38,
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low: 56837.03,
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open: 57014.22,
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volumefrom: 761.03,
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volumeto: 43377564.28,
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close: 57193.03,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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{
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time: 1638352800,
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high: 57212.91,
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low: 56897.87,
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open: 57144.92,
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volumefrom: 884.14,
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volumeto: 50454456.17,
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close: 57014.22,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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{
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time: 1638349200,
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high: 57197.5,
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low: 56769.43,
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open: 56935.98,
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volumefrom: 1157.5,
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volumeto: 65981513.98,
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close: 57144.92,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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{
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time: 1638345600,
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high: 57851.44,
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low: 56863.93,
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open: 57169.38,
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volumefrom: 2238.66,
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volumeto: 128240428.38,
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close: 56935.98,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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90 more items
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]
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Answer
JavaScript
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const data = [{
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time: 1638356400,
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high: 57274.38,
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low: 56837.03,
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open: 57014.22,
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volumefrom: 761.03,
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volumeto: 43377564.28,
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close: 57193.03,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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{
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time: 1638352800,
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high: 57212.91,
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low: 56897.87,
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open: 57144.92,
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volumefrom: 884.14,
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volumeto: 50454456.17,
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close: 57014.22,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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{
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time: 1638349200,
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high: 57197.5,
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low: 56769.43,
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open: 56935.98,
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volumefrom: 1157.5,
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volumeto: 65981513.98,
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close: 57144.92,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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{
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time: 1638345600,
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high: 57851.44,
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low: 56863.93,
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open: 57169.38,
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volumefrom: 2238.66,
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volumeto: 128240428.38,
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close: 56935.98,
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conversionType: 'direct',
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conversionSymbol: ''
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},
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]
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const open = data.map(e => e.open)
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console.log(open)