To accomplish these objectives, we need to make only one rule in our programming: Assign a value to a variable only once and NEVER MODIFY IT!
为了达成这些目标，我们只需要在程序设计中制定一个规则：一个变量只赋值一次，而且永远不再修改它！
For example, if you have a value that you want to assign to many targets, you can use an assign to set a value to the variable, then use a move transform from that variable to multiple attributes.
例如，如果您有一个希望赋值给许多目标的值，您可以使用赋值来将某个值设置到该变量，然后使用从该变量到多个属性的移动转换。
Because a map requires all targets to have a mapping, you can assign some default value to the extra parameter.
由于映射要求所有目标都具有映射，您可以向额外参数赋予某些缺省值。
This guarantees that the column values remain unique and frees you from worrying about this column later on (don't try to assign a value to it, though).
这保证列值是惟一的并避免您为这个列操心(但是，不要尝试为它赋值)。
An assign parameter mapping lets you specify a constant value to put in a target parameter.
赋值参数映射允许您指定一个常数值来放在目标参数中。
An assign transform sets a constant value to a target attribute.
赋值转换将一个常数值设置到目标属性。
Assign a numerical value to each of the evaluations, which allows you to compare each element to the others across the life cycle of the problem-solving process.
对每一个评估赋一个数值，这使得您可以跨越问题解决流程的生命周期来将每个元素同其他的进行比较。
A variable declaration, unless you assign a value to the variable.
变量声明，除非你给变量赋予了一个值。
These variables are the internal objects used by the snippet to which you need to assign a corresponding value.
这些变量是代码片段使用的内部对象，您需要向其分配相应的值。
Use the single equal sign to assign a value to a variable, unlike the double equal sign (==), as in the previous condition, which compare the values.
使用单等于号来向变量赋值，而不是像在前一个条件中那样使用双等于号 (==) 来比较值。
Select the target element or attribute to assign a value.
选择目标元素或属性以指定值。
You can assign to document routing data containers any collection of name-value pairs and provide a convenient store for workflow global data state.
可以把任何名值对集合分配给文档路由数据容器，为工作流全局数据状态提供方便的存储。
You usually see this error when you assign a value returned from a function to a variable with a more specific type.
你通常会把函数返回值赋给拥有更特定类型变量的时候遇到这样的错误。
The same skills that allow you to assign a positive emotional value to average daily activities also give you the power to devalue unwanted or inappropriate tendencies.
你拥有技巧可以为日常活动分配你的积极情感价值，这些技巧也可以用来贬低多余的、不适宜的倾向的价值。
This clause is used to assign a value (possibly containing a list of several items) to a variable that can be used in other clauses of the FLWOR expression.
该子句用于将一个值(可能包含一个由多项组成的列表)赋给一个变量，这个变量可以在FL WOR表达式的其他子句中使用。
The default expression calculates a value to assign to the global variable the first time it is referenced.
在第一次引用时，默认表达式将为全局变量计算一个值。
As you can see, you can declare a property and assign its value at the same time.
正如所看到的，可以同时声明属性并为其赋值。
Then we closed trading in the market, and asked the kids to assign a value to the gift they wound up with.
那么我们结束了交易，问孩子给他们所兴奋的糖果给出评分。
Create a parameter named empno, and assign it the value of the employee's empno for the selected row.
创建一个名为empno的参数，然后将其赋予员工的empno值，为选中的行。
The default model binder also cannot assign a null value to a property that does not accept nulls. In particular, the model binder cannot assign a null value to the UnitsInStock property.
默认的模型绑定器同样不能指定一个null值到一个不允许为null的属性中，这里的情况是模型绑定其不能指定一个null值到UnitsInStock属性中。
Haskell is statically typed, so once you assign a variable to a value, the variable always holds the same type.
Haskell是静态类型化的，所以一旦给变量分配了值，那么变量就会一直维持相同的类型。
We use this method to assign a long-form breed name to each enumeration value, which is what the Value.toString method returned in the output above.
我们使用这个方法来给每一个枚举值赋一个长的品种名称，也就是上面输出中的Value. toString方法所返回的值。
Note the use of the assign keyword here to create a variable attribute for setting the counter's value.
注意，这里使用assign关键字创建一个变量属性，用它设置计数器值。
He cannot yet assign a specific average pH value to Alaskan waters, but other data show a clear trend line.
他还不能给出一个阿拉斯加水域平均的PH值，但是其他的资料已经给出了一个明确的趋势曲线。
Just as with story sizing, Kelly USES a Fibonacci scale to assign relative business value to each story.
随着故事规模的增大，Kelly使用斐波那契数列来将相关的业务价值分配给每个故事。
Some commands can have a return value, which you can assign to a cheat sheet variable using the returns attribute.
有些命令可有返回值，您可以通过使用returns属性将这个值赋给备忘单变量。
The Assign refinement is used when you want to assign a constant value to a target element or attribute.
希望将常量值指定给目标元素或属性时，就要使用Assign细化。
For any attribute in Laszlo, you can assign a constraint expression instead of a standard value. Constraint expressions begin with a dollar sign, and have the following format.
对于Laszlo中的任何属性，都可以为之赋予一个约束表达式(constraintexpression)，而不是赋予一个标准的值。
In other words, you can declare a variable in XPath and assign it a value from the XPath.
换句话说，您可以在XPath中声明变量并从XPath中为其赋值。
On the Details TAB of the Properties view for the Assign, enter a colon (:) character in the value field (Figure 15).
进入Assign的Properties视图的Details选项卡，在value字段中输入一个冒号(：)字符(图15)。
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