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Close| searchContext | SearchContext used to initialize the SearchExpressionContext that will encapsulate all information relative to expression evaluation. |
| executionFlags | Execution flags helping define how to evaluate the expression. |
| c | SearchExpressionContext that will encapsulate all information relative to expression evaluation. |
void Returns an enumerable list of SearchItem.
Execute a SearchEXpression givent a certain SearchContext Depending on flags the expression might be valuated in a worker thread (by default) or in the main thread. It returns a an enumerable list of SearchItem.
[SearchExpressionEvaluator(SearchExpressionType.Iterable | SearchExpressionType.Variadic)] [SearchExpressionEvaluatorSignatureOverload(SearchExpressionType.Number, SearchExpressionType.Iterable | SearchExpressionType.Variadic)] [Description("Extract and returns the X first results for each expression.")] public static IEnumerable<SearchItem> TakeXFirst(SearchExpressionContext c) { var argIndex = 0; var takeNumber = 1; if (c.args[0].types.HasFlag(SearchExpressionType.Number)) { ++argIndex; takeNumber = Math.Max((int)(c.args[0].GetNumberValue(takeNumber)), 0); } for ( ; argIndex < c.args.Length; ++argIndex) { var iterable = c.args[argIndex].Execute(c); var taken = 0; foreach (var item in iterable) { if (item == null) yield return null; else { yield return item; ++taken; if (taken == takeNumber) { c.Break(); break; } } } } }