Whew! It might actually be cooling in northern Texas a little bit. That’ll be nice.
In Part 74, we talked about the ArrayCopySeries() function and I digressed somewhat with a discussion of trade volumes on the MT4 platform. Here we’ll discuss some additional series and other multi-dimensional array functions.
int ArrayDimension(object array)) – this function will return the number of dimensions for which the object array is dimensioned.
This would be handy if you wanted to write a function that performed a calculation on the array that was passed. The function could be written to handle multiple dimensions making it much more versatile.
bool ArrayGetAsSeries(object array) – this function will test your array and return a true if the array is organized as a series array (indexed top to bottom.)
bool ArrayIsSeries(object array) – this function will return true if the array is actually a series array (Time,Open,Close,High,Low, or Volume.)
The difference between a series/series-organized array and a regular array is that there is no memory set aside for a series array, the data is stored in the same memory location that the actual price data is stored. Because it’s actual rate data, a series array cannot be initialized with different values.
bool ArraySetAsSeries(double&array, bool set) – this function will set the indexing direction of the array. “If the set parameter has the TRUE value, the array will be indexed in a reversed order, i.e., the last element has a zero index. The FALSE value sets a standard indexing order. The function returns the previous status. ” Quoted from here.
And that’s a wrap on arrays. Next time we’ll revisit our discussion of chart drawing objects and some tricks I use in their placement.
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