Method filterByLimit

java/lib/src/main/java/io/github/ccxt/Exchange.java:4510–4558

(Object array, Object... optionalArgs)

    }

    public Object filterByLimit(Object array, Object... optionalArgs)
    {
        // array = ascending ? this.arraySlice (array, 0, limit) : this.arraySlice (array, -limit);
        // array = ascending ? this.arraySlice (array, -limit) : this.arraySlice (array, 0, limit);
        Object limit = Helpers.getArg(optionalArgs, 0, null);
        Object key = Helpers.getArg(optionalArgs, 1, "timestamp");
        Object fromStart = Helpers.getArg(optionalArgs, 2, false);
        if (Helpers.isTrue(this.valueIsDefined(limit)))
        {
            Object arrayLength = Helpers.getArrayLength(array);
            if (Helpers.isTrue(Helpers.isGreaterThan(arrayLength, 0)))
            {
                Object ascending = true;
                if (Helpers.isTrue((Helpers.inOp(Helpers.GetValue(array, 0), key))))
                {
                    Object first = Helpers.GetValue(Helpers.GetValue(array, 0), key);
                    Object last = Helpers.GetValue(Helpers.GetValue(array, Helpers.subtract(arrayLength, 1)), key);
                    if (Helpers.isTrue(Helpers.isTrue(!Helpers.isEqual(first, null)) && Helpers.isTrue(!Helpers.isEqual(last, null))))
                    {
                        ascending = Helpers.isLessThanOrEqual(first, last); // true if array is sorted in ascending order based on 'timestamp'
                    }
                }
                if (Helpers.isTrue(fromStart))
                {
                    if (Helpers.isTrue(Helpers.isGreaterThan(limit, arrayLength)))
                    {
                        limit = arrayLength;
                    }
                    if (Helpers.isTrue(ascending))
                    {
                        array = this.arraySlice(array, 0, limit);
                    } else
                    {
                        array = this.arraySlice(array, Helpers.opNeg(limit));
                    }
                } else
                {
                    if (Helpers.isTrue(ascending))
                    {
                        array = this.arraySlice(array, Helpers.opNeg(limit));
                    } else
                    {
                        array = this.arraySlice(array, 0, limit);
                    }
                }
            }
        }
        return array;
    }

    public Object filterBySinceLimit(Object array, Object... optionalArgs)
    {