It'll allow you to tackle interesting problems I'll have you to write from scratch, but it does mean that this skill here is going to be really valuable.
它会让你处理有趣的问题，我会让你绞尽脑汁的编写，但是这一点意味着，这个技能非常宝贵。
So all the custom rules you write need to be written from scratch even if a built in one almost does what you want.
因此你所编写的所有自定义规则都需要从头做起，即便其中的一个已经几乎达到了你的目的。
A common beginner mistake, however, is to underestimate the time needed to write an operating system from scratch.
刚开始开发的人，通常会犯这样一个错误- - - - - - -会低估从无到有开发一个操作系统需要的时间长度。
Open source software is a wonderful resource because it allows developers to reuse existing code to fill specific needs rather than write new software from scratch.
开源软件是极好的资源，因为它让开发人员复用现有的代码来满足具体的需求，而不是从零开始写新的软件。
The reuse issue is absolutely critical — it would be insane to write everything from scratch for each application, because it would take too long to redevelop each component.
重用的问题相当关键——为每个应用程序都从新开始编写所有的内容是非常愚蠢的，因为重新开发每个组件会花费太长时间。
I've certainly developed DM adapters for specific storage engines in a fraction of the time it would take to write an entire object mapper from scratch.
我非常肯定为特定的存储引擎开发DM适配器只需要花费一些时间来编写一个完整的对象映射器。
You could also write all your CSS from scratch; however, this process is time consuming if your application USES a lot of widgets.
也可以从头编写所有css；不过，如果应用程序中使用了很多小部件，那么这个过程会很耗时。
If you started with a browser-specific version, you would have to re-write the whole thing from scratch when you changed your target platform.
如果你从详细的用例(基于浏览器的系统用例)，每次改变你的实现平台的时候，你都得重写整个用例。
Occasionally bugs even require developers to re-write major portions of a project from scratch, because bugs are good at revealing fundamental deficiencies of the code.
因为错误往往暴露了代码的根本缺陷，所以有时候开发人员甚至会为了几个错误而从头开始重新编写项目的主要部分。
If you had started designing the XML schema from scratch, it would have been difficult to just write down the object types in XML.
如果您是从头开始设计XML模式的，那么将很难只使用XML写下对象类型。
First, decide whether to write the filter from scratch or copy and modify a filter that already exists and is similar to what you want to accomplish.
首先，确定是从头开始编写过滤器，还是复制并修改已存在的类似过滤器。
There were so many spelling mistakes, I had to write the letter out again from scratch.
这封信的拼写错误太多，我得重写一遍。
The object model supported single inheritance, which let users extend (specialize) an existing class without having to write it from scratch or copy it.
对象模型支持单一继承，能让用户扩展（系列化）一个存在的类，而不用从头再写或复制。
He said "it's quite a technical course and we are looking at fundamental game programming - how to write games from scratch - as well as using existing libraries and building games from components."
他说：“这是一个技术课程，并且我们正在寻找一个基础性的游戏项目- - -如何从头开始编写游戏- - -正如应用现有的库和组件建立游戏。”
He said "it's quite a technical course and we are looking at fundamental game programming - how to write games from scratch - as well as using existing libraries and building games from components."
他说：“这是一个技术课程，并且我们正在寻找一个基础性的游戏项目- - -如何从头开始编写游戏- - -正如应用现有的库和组件建立游戏。”
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