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Is the data a null value ?
Source position: fpjson.pp line 134
public property TJSONData.IsNull : Boolean |
IsNull is True only for JSONType=jtNull, i.e. for a TJSONNull instance. In all other cases, it is False. This value cannot be set.
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Possible types of JSON data |
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JSONType |
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Class to represent boolean JSON data. |
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AsFloat |
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Value |
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AsInt64 |
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AsString |
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AsInteger |
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AsBoolean |
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AsJSON |