小编Dav*_*iss的帖子

POM是

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.geotools</groupId>
    <artifactId>tutorial</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>tutorial</name>
    <url>http://maven.apache.org</url>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <geotools.version>10-SNAPSHOT</geotools.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-shapefile</artifactId>
            <version>${geotools.version}</version>
        </dependency>
        <dependency>
            <groupId>org.geotools</groupId>
            <artifactId>gt-swing</artifactId>
            <version>${geotools.version}</version>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>maven2-repository.dev.java.net</id>
            <name>Java.net repository</name>
            <url>http://download.java.net/maven/2</url>
        </repository>
        <repository>
            <id>osgeo</id>
            <name>Open Source Geospatial Foundation Repository</name>
            <url>http://download.osgeo.org/webdav/geotools/</url>
        </repository>
    </repositories>
</project>

我收到错误:

[ERROR] Failed to execute goal on project tutorial: Could not resolve dependencies for project org.geotools:tutorial:jar:1.0-SNAPSHOT: The following artifacts could not be resolved: org.geotools:gt-shapefile:jar:10-SNAPSHOT, org.geotools:gt-swing:jar:10-SNAPSHOT: Could not …

我想有一个继承数组属性的对象和一个向继承数组添加元素的方法.但是,继承的方法yChange()更改了原型数组而不是继承的数组.这个问题解释了为什么会发生不良行为.但无法弄清楚如何获得理想的行为.

var parent = {
    x: 0,
    y: [],
    xChange: function () {this.x += 1},
    yChange: function () {this.y.push(1)}
};

var child = Object.create(parent);
child.xChange();
child.yChange();

console.log(child.x, child.y); // 1 [1]
console.log(parent.x, parent.y); // 0 [1]

期望:

console.log(child.x, child.y); // 1 [1]
console.log(parent.x, parent.y); // 0 []