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https://www.jianshu.com/p/1e1c7e7cec50 var example = this.service.gettest().pipe( map((val) => { console.log(val.toString()) if (parseInt(val.toString 阅读全文
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1. JMM, java内存管理,指的是线程管理,保证线程安全 2. volatle and synchorozed volatile is lightwweight, only variable while synchonzied is heavy. for variable and method 阅读全文
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1.TImer 2. Quartz 3. Sprint with config 4. spring boot+enableScheduling ** iin spring boot, spring boot schedule has be tobe used. if use quartz, will 阅读全文
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Recently when I work on ETL task: Consume data from Kafka to DB. Frequent a row a connect->insert->close to DB is not a good option. First setParalism 阅读全文
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yarn is similar to npm. how to install yarn: npm install yarn -g or choco install yarn npm vs yarn: yarnnpm说明 yarn init npm init 初始化项目,生成package.json文 阅读全文