小编Dam*_*Fox的帖子

我正在尝试显示从维基百科API的响应中获取的结果列表.如果响应未显示任何列表,则应显示不同的消息.我正在尝试进行条件渲染.

这是代码:

getData(e) {
        e.preventDefault();
        var search = e.target.search.value;
        var wikipediaEndPoint = "https://en.wikipedia.org/w/api.php?format=json&origin=*&action=query&generator=search&gsrnamespace=0&prop=pageimages|extracts&pilimit=max&exintro&explaintext&exsentences=1&exlimit=max&gsrsearch="+search;
        var wikipediaUrl = "https://en.wikipedia.org/?curid=";

        fetch(wikipediaEndPoint)
        .then(data => {
            return data.json();
        }).then(data => {
            var objectList = (data.hasOwnProperty("query")) ? data.query.pages : "";
            let resultList;

            if(objectList !== ""){
                resultList = Object.keys(objectList).map(function(key, index) {
                    return (
                        <div className="item" key={objectList[key].pageid}>
                            <a href={wikipediaUrl+objectList[key].pageid}>
                                <h1>{objectList[key].title}</h1>
                                <p>{objectList[key].extract}</p>
                            </a>
                        </div>
                    )
                });
            } else {
                resultList = (function() {
                    return (
                        <div className="item" key={1}>
                            <p>No results!</p>
                        </div>
                    )
                });
            }

            this.setState({search: resultList});
        })
    }

结果如下所示: …

我正在尝试使用mongoimport以下命令行导入 json 文件：

mongoimport --db posts --collection rows --file post_history.json

但它返回此错误：

connected to: localhost
Failed: error processing document #1: invalid character 'N' after object key:value pair
imported 0 documents

该文件的内容如下所示：

[
 {
 "Id" : 1,
 "PostHistoryTypeId" : 2,
 "PostId" : 1,
 "RevisionGUID" : "1e04af17-3bdb-4263-aa46-97ee7fb1b0b6",
 "CreationDate" : "2011-06-21 20:19:34",
 "UserId" : 9,
 "Text" : "My finance and myself are looking for a good Caribbean cruise in October and were wondering which islands are best to see and which Cruise …

我正在尝试使用以下命令启动Spark应用程序：

time spark-submit --master "local[4]" optimize-spark.py

但是我得到了这些错误：

Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
16/01/27 15:43:32 INFO SparkContext: Running Spark version 1.6.0
16/01/27 15:43:32 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
16/01/27 15:43:32 INFO SecurityManager: Changing view acls to: DamianFox
16/01/27 15:43:32 INFO SecurityManager: Changing modify acls to: DamianFox
16/01/27 15:43:32 INFO SecurityManager: SecurityManager: authentication disabled; ui acls disabled; users with view permissions: Set(DamianFox); users with modify permissions: Set(DamianFox)
16/01/27 15:43:33 INFO Utils: …