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Drops values from your data, but only the ones that match a test you define. You pick which values to look at, then set one or more conditions; any value that meets all of them is removed, and everything else stays as it is. This is the tool for cleaning out unwanted entries, such as stripping out fields that are empty or removing prices that are zero.

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Fields

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Sample data

FieldValue
AccessorBy pattern, pattern *
ConditionsIs empty
Input: 
{
    "name": "Wool scarf",
    "color": "blue",
    "size": "",
    "material": null
}
Output: 
{
    "name": "Wool scarf",
    "color": "blue"
}
The pattern selected every value, but only the empty size and the null material met the condition, so only those two were removed.