(Imperative Programming)和声明式编程(Declarative Programming)都是计算机编程的范式,它们有着不同的特点和适用场景。 首先,我们讨论命令式编程。在命令式编程中,程序员需要明确地告诉计算机需要执行哪些步骤来达到预期的结果。我们可以把这种范式比作烹饪食谱:食谱会明确地告诉你需要什么成分,然后应该按照什么顺序进行哪些步...
命令式编程(Imperative Programming)和声明式编程(Declarative Programming)都是计算机编程的范式,它们有着不同的特点和适用场景。 首先,我们讨论命令式编程。在命令式编程中,程序员需要明确地告诉计算机需要执行哪些步骤来达到预期的结果。我们可以把这种范式比作烹饪食谱:食谱会明确地告诉你需要什么成分,然后应该按照什么顺序...
If we were to use it, our imperative example would be slow because we would have to iterate over the full list of owners for every dog in the list. But in the SQL example we can let the database deal withhowto get the correct results. If it makes sense to use an index (providing...
命令式编程（Imperative Programming）和声明式编程（Declarative Programming）是计算机编程的两种范式，各自有独特特点及适用场景。命令式编程侧重于详细说明计算机执行步骤以达到结果。类比烹饪，编程者需明确告知需要哪些材料及操作顺序。例如，计算数组元素总和，Python命令式编程代码如下：我们直接告知计算机执行过...
In contrast to the imperative one,declarative programmingis about describing what you're trying to achieve, without instructing how to do it. Let's convert the imperative example above into a declarative one (using promise-like constructs): ...
Engineers familiar with imperative programming might forget that the location where a declarative directive appears in the configuration does not affect its execution time. Consider the following configuration:allow 1.2.3.4; deny all; location /hello { return 200 'Hello World!'; } location / { ...
【摘要】 命令式编程(Imperative Programming)和声明式编程(Declarative Programming)都是计算机编程的范式,它们有着不同的特点和适用场景。首先,我们讨论命令式编程。在命令式编程中,程序员需要明确地告诉计算机需要执行哪些步骤来达到预期的结果。我们可以把这种范式比作烹饪食谱:食谱会明确地告诉你需要什么成分,然后应该按...
Engineers familiar with imperative programming might forget that the location where a declarative directive appears in the configuration does not affect its execution time. Consider the following configuration:allow 1.2.3.4; deny all; location /hello { return 200 'Hello World!'; } location / { ...
Declarative programming focuses on the end result, while imperative programming focuses on how to get there. For example, when you jump in a taxi, youdeclareto the driver where you want to go. You don't tell him how to get there by providing turn-by-turn directions. The turn-by-turn ...
命令式编程(Imperative Programming)和声明式编程(Declarative Programming)都是计算机编程的范式,它们有着不同的特点和适用场景。 首先,我们讨论命令式编程。在命令式编程中,程序员需要明确地告诉计算机需要执行哪些步骤来达到预期的结果。我们可以把这种范式比作烹饪食谱:食谱会明确地告诉你需要什么成分,然后应该按照什么顺序...