dynamic variable name

[gjniewenhuijse]

i like to get data from a table, but the variable name is dynamic. See my example:

Code:

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-- devices devices = {   {'9d', 'SENSOR', '8/4/5', 'v.hum'},   {'9e', 'COMMON', '8/4/6', 'v.tst'} } -- data get from webservice v = {hum=1, tst='abc'} log(v.hum, v.tst) -- print some data from v, based on data in devices for k,k_items in pairs(devices) do   -- log variable name   log(k_items[4])   -- log the data in variable with name k_items[4], for example the data in v.hum or v.tst (1 or abc) end

[admin]

Like this, and make sure that v is defined before devices:

Code:

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-- data get from webservice v = {hum=1, tst='abc'} log(v.hum, v.tst) -- devices devices = {   {'9d', 'SENSOR', '8/4/5', v.hum},   {'9e', 'COMMON', '8/4/6', v.tst} } -- print some data from v, based on data in devices for k,k_items in pairs(devices) do   -- log variable name   log(k_items[4])   -- log the data in variable with name k_items[4], for example the data in v.hum or v.tst (1 or abc) end

[gjniewenhuijse]

Like this, and make sure that v is defined before devices:

Code:

12345678910111213141516

-- data get from webservice v = {hum=1, tst='abc'} log(v.hum, v.tst) -- devices devices = {   {'9d', 'SENSOR', '8/4/5', v.hum},   {'9e', 'COMMON', '8/4/6', v.tst} } -- print some data from v, based on data in devices for k,k_items in pairs(devices) do   -- log variable name   log(k_items[4])   -- log the data in variable with name k_items[4], for example the data in v.hum or v.tst (1 or abc) end

No thats not possible, because my devices are defined before i get the data from the webservice.
Now i defined v hardcoded, but normally this thats comes from the web and is parsed.

[admin]

Then do it like this:

Code:

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-- devices devices = {   {'9d', 'SENSOR', '8/4/5', 'hum'},   {'9e', 'COMMON', '8/4/6', 'tst'} } -- data get from webservice v = {hum=1, tst='abc'} log(v.hum, v.tst) -- print some data from v, based on data in devices for k,k_items in pairs(devices) do   key = k_items[4]   val = v[ key ]   -- log variable name   log(val)   -- log the data in variable with name k_items[4], for example the data in v.hum or v.tst (1 or abc) end

[gjniewenhuijse]

yeah.. thanks

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i need the value 'attributes.soilHumidity.value'

how to do this in a nested table?

Code:

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["type"]   * string: SENSOR ["attributes"]   * table:    ["soilTemperature"]     * table:      ["timestamp"]       * string: 2020-10-31T14:49:03.034+0000      ["value"]       * number: 13    ["lightIntensity"]     * table:      ["timestamp"]       * string: 2020-10-31T14:49:16.260+0000      ["value"]       * number: 7    ["soilHumidity"]     * table:      ["timestamp"]       * string: 2020-10-31T14:49:03.004+0000      ["value"]       * number: 100    ["ambientTemperature"]     * table:      ["timestamp"]       * string: 2020-10-31T14:49:17.023+0000      ["value"]       * number: 16 ["relationships"]   * table:    ["device"]     * table:      ["data"]       * table:        ["type"]         * string: DEVICE        ["id"]         * string: 40940964969046840 ["id"]   * string: 5647657567567567567

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here my new example code

Code:

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-- devices devices = {   {'9d', 'SENSOR', '8/4/5', 'attributes.soilHumidity.value'},   {'9e', 'COMMON', '8/4/6', 'attributes.batteryLevel.value'} } -- data get from webservice v = { attributes= { soilHumidity={value=1},batteryLevel={value=100} } } log(v) log(v.attributes.soilHumidity.value) log(v.attributes.batteryLevel.value) -- print some data from v, based on data in devices (dynamic) for k,k_items in pairs(devices) do   key = k_items[4]   val = v[ key ]   log(key, val) end