node-string-format

本模块的目的是用于扩展node自带的util.format

1 安装

npm install node-string-format

2 特性

*索引占位符

var format = require("node-string-format");
format("Hi, guys, I'm {0}", "node-string-format");

这段代码的结果是

Hi, guys, I'm node-string-format

* 名称占位符

例如下面这个很生硬的例子

var student = {
    studentName : "Mike",
    age : 18
};

var mathClass = {
    className : "Math",
    score : 100
};

为了得到下面的输出

"My name is Mike, I got 100 marks in mathematics"

通过名称占位符，可以这样做

var composedEntity = {
    studentName : student.studentName,
    mathScore : mathClass.score
};

format("My name is {studentName}, I got {mathScore} marks in mathematics", composedEntity);

在上面的代码里，两个实体上需要用到的属性被事先合并到了一个实体里。但是node-string-format允许你省略掉这一步，它支持从不同的实体中获取信息：

format("My name is {studentName}, I got {score} marks in mathematics", student, mathClass);

注:如果在多个实体上有名称相同的属性，前面的优先

* 如果想在格式化的时候输出"{"和"}",需要转义

format("{{");//{
format("}}");//}

node-string-format

this is a module to extend node's builtin util.format

1 Install

npm install node-string-format

2 Features

*Index Placeholder

var format = require("node-string-format");
format("Hi, guys, I'm {0}", "node-string-format");

will outputs

Hi, guys, I'm node-string-format

* Name Placeholder

Look at this small, weird example:

var student = {
    studentName : "Mike",
    age : 18
};

var mathClass = {
    className : "Math",
    score : 100
};

In order to get this

"My name is Mike, I got 100 marks in mathematics"

We can do like this with name placeholder

var composedEntity = {
    studentName : student.studentName,
    mathScore : mathClass.score
};

format("My name is {studentName}, I got {mathScore} marks in mathematics", composedEntity);

In above code, we made a new entity contains properties we want at first, but this is not necessary.node-string-format can exact infomation from different entities.

format("My name is {studentName}, I got {score} marks in mathematics", student, mathClass);

note:if property with the same name exists in multiple entities, the foremost will be used

* If "{" or "}" is wanted when formatting, you can do like this:

format("{{");//{
format("}}");//}