/// <summary>
/// Some operations on the vector.
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public override QsValue Execute(ParticleLexer.Token expression)
{
if (expression.TokenValue.Equals("length", StringComparison.OrdinalIgnoreCase))
{
return(this.Count.ToScalarValue());
}
return(base.Execute(expression));
}
static void ReadCurrenciesJson()
{
if (!File.Exists(TodayChangeRatesFile))
{
// get the file from http://openexchangerates.org
DownloadExchangeFile();
}
using (var rr = new System.IO.StreamReader(TodayChangeRatesFile))
{
CurrenciesJson = ParticleLexer.Token.ParseText(rr.ReadToEnd());
}
/*
* json format is
*
* { "key": value, "key": "other value", "key":{ "key":value }
*
* value is either string or number
*
*/
CurrenciesJson = CurrenciesJson.TokenizeTextStrings();
CurrenciesJson = CurrenciesJson.MergeTokens <WordToken>();
CurrenciesJson = CurrenciesJson.RemoveAnySpaceTokens();
CurrenciesJson = CurrenciesJson.RemoveNewLineTokens();
CurrenciesJson = CurrenciesJson.MergeTokens <NumberToken>();
CurrenciesJson = CurrenciesJson.MergeSequenceTokens <MergedToken>(
typeof(ParticleLexer.CommonTokens.TextStringToken),
typeof(ColonToken),
typeof(NumberToken)
);
Currs = new Dictionary <string, double>();
// find rates key
foreach (var tok in CurrenciesJson)
{
if (tok.TokenClassType == typeof(MergedToken))
{
Currs.Add(tok[0].TrimTokens(1, 1).TokenValue, double.Parse(tok[2].TokenValue, CultureInfo.InvariantCulture));
}
}
}
/// <summary>
/// when executing object->method or property
/// </summary>
/// <param name="expression"></param>
/// <returns></returns>
public override QsValue Execute(ParticleLexer.Token expression)
{
return(ContentValue.Execute(expression));
}