Self checkout lane

Reading Time: < 1 minute The self checkout at grocery store and warehouses. Personally I think Costco $COST got it right, they have plenty of staffs to assist: for scanning as well as alcohol overwrite. Sam’s Club has one staff helping multiple lanes, but it also has a #scanandgo option in its app. /1 The scanning feature in the app… Continue reading Self checkout lane

NerdWallet ipo

Reading Time: < 1 minute 感觉这个市场还是有些泡沫的. EV 就不说了：昨天傍晚🌆的时候开车时我的七岁小女儿说看到一个Tesla. I was thinking buy a share of $TSLA just now, but I changed to $F instead [呲牙] || Separately I noticed NerdWallet the personal finance / credit card 💳 bonus website went public last week. I worked in the credit card rewards space in the past and I used to get some… Continue reading NerdWallet ipo

One set of source code – 12 factors app principle no. 1

Reading Time: 3 minutes For 12 factor application the No. 1 principle is one source code base. Today I was thinking about this topic: one sets of source code for one app, and use configuration for language, region or other different settings for different customers. And this reminded me of some of the articles I read (such as this… Continue reading One set of source code – 12 factors app principle no. 1

Raspberry Pi

Reading Time: 2 minutes Downloaded Noobs image installer (imager_1.6.2) to Mac, unpack (or install) so that I have “Raspberry Pi Imager” on Mac, and then used it to create the bootable OS on the sd card using that software. After that insert the sd card to the appropriate slot on p3, also plugged in hdmi for monitor, and usb… Continue reading Raspberry Pi

Mental health break

Reading Time: < 1 minute Two more off days for the kids and teachers before thanksgiving holidays. Please note I still have 2 vacation days to cover it (also I WFH full time since March 2020 pandemic shutdown). Btw, I heard mental health break is getting popular among school districts (public schools), so there is peer pressure there. || The… Continue reading Mental health break

Hiring Right

Reading Time: 2 minutes In a little over last year or so, I was involved in many technical interviews, and sometimes hiring decisions (one vote only, but a No vote is usually a No for the candidate). This is quite different from normal technical contributor’s job. But I learn something from this process too. I think overall I had… Continue reading Hiring Right

Java keytool

Reading Time: < 1 minute Keytool The Most Common Java Keytool Keystore Commands import keytool -import -trustcacerts -alias root -file Thawte.crt -keystore keystore.jks (or cacerts) (keytool -keystore $CACERTS_STORE -storepass changeit -importcert -alias jfrog.root -file jfrog.root.cer -noprompt) list keytool -list -v -keystore $JAVA_HOME/jre/lib/security/cacerts Install Spring STS on Mac Drag the STS to the Application may not necessary, as it could not… Continue reading Java keytool