下载Tau-Prolog之后,我尝试运行this example,但是突然被我停止了:
$ nodejs ./sample.js bread /home/stefan/Desktop/tau-prolog/tau-prolog.js:6117 pl.type.is_dom_object = function( obj ) { ^ TypeError: Cannot read property 'type' of undefined at /home/stefan/Desktop/tau-prolog/tau-prolog.js:6117:5 at Object. (/home/stefan/Desktop/tau-prolog/tau-prolog.js:6382:3) at Module._compile (module.js:652:30) at Object.Module._extensions..js (module.js:663:10) at Module.load (module.js:565:32) at tryModuleLoad (module.js:505:12) at Function.Module._load (module.js:497:3) at Module.require (module.js:596:17) at require (internal/module.js:11:18) at Object. (/home/stefan/Desktop/tau-prolog/sample.js:2:10)
这是我当前的配置:
$ pwd /home/stefan/Desktop/tau-prolog $ ls core.js js.js lists.js sample.js tau-prolog.js dom.js license.txt random.js statistics.js $ uname -a Linux stefan-TravelMate-B117-M 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:45:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux $ nodejs --version v8.10.0
如何摆脱这个问题?
该问题似乎在最新版本的系统中消失了。
答案 0 :(得分:2)
该示例具有用于导入tau-prolog.js的占位符路径:
var pl = require( "./path/to/tau-prolog.js" );
您需要将"./path/to/tau-prolog.js"
替换为tau-prolog.js的实际路径,在您的情况下,该路径应仅为"./tau-prolog.js"
,因为该文件与样本位于同一目录中。试图运行。