新手可以轻松地在图上拖动元素，从而改变数据元素在模式中的次序。
Novice users can easily drag elements around the diagram to change the order of the data elements in the schema.
添加新的元素名并不会改变数据结构——它总是树结构。
Adding new element names does not change the data structure-it always remains a tree structure.
所以，这就是问题所在：我们需要一个简单的方法来改变数，更新用户界面的条件只有一个元素的财产。
So, that's the problem: we need a simple way to change a property of several UI elements by updating just one condition.
一个称为索引或注标的唯一号码，会与共用变数名称结合，用以分辨阵列中的每个元素。
A unique number, called an index or subscript, combined with the Shared variable name distinguishes each element in the array.
下列范例会显示两个取得阵列变数，并在其元素上作业的程序。
The following example shows two procedures that take an array variable and operate on its elements.
这表示阵序和元素资料型别必须保持相同，因为它们都是阵列变数资料型别的固有部分。
This means that the rank and the element data type must remain the same, because they are inherently part of the array variable's data type.
宣告阵列变数后，就不可再变更其阵序或其元素资料型别。
Once you declare an array variable, you cannot change its rank or its element data type.
不可变数据是函数编程中的一个重要元素。
Immutable data is an important element of functional programming.
不可变数据是函数编程中的一个重要元素。
Immutable data is an important element of functional programming.
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