#Development

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Page 12 of 22

May 27, 2020Programming
Key-Exchange Logic for Encrypting Interface Data in Front-End/Back-End Separated Projects (Addendum: MITM Man-in-the-Middle Attack)
Earlier I wrote "Key-Exchange Logic for Encrypting Interface Data in Front-End/Back-End Separated Projects (RSA, AES)", explaining the encryption/decryption strategy when front and back ends exchange data. As my understanding and grasp of network programming grew, two months later I had to write another addendum to patch my previous article, because improper use still can't achieve absolute security. The previous article didn't mention the man-in-the-middle attack, so I'm adding it here.
ProgrammingDevelopmentJavaCodeSecurity
May 26, 2020Programming
Why You Can't Use double/float for Transactions and Financial Currency in Java — Use BigDecimal
Why can't you use double/float for transactions and financial currency in Java? In daily use, floating-point calculations with double/float often produce unexpected results, because binary can't precisely represent most decimal fractions. Today we'll discuss how to do decimal calculations correctly in Java.
ProgrammingDevelopmentJavaCode
May 22, 2020Server Side
What kill, kill -9, and kill -3 Mean in Linux and How They Differ
Many students often use the kill command to kill processes in daily Linux use. Some use kill directly, some use kill -9, some use kill -3. What do they mean and what's the difference? Today we'll learn about the kill command and signals in Linux.
ProgrammingDevelopmentOpsServerHosting
May 21, 2020Industry News
Alipay's Self-Developed Database Sets a Record: 707 Million Orders Created Per Minute
According to the latest results published on the evening of May 20 on TPC-C, the authoritative database ranking, Alipay's self-developed distributed relational database OceanBase scored above the 100-million mark for the first time in the latest TPC-C benchmark, reaching 707 million tpmC — meaning 707 million new orders created per minute, an nearly 11x improvement over the 60.88 million tpmC of October last year.
DevelopmentDatabaseNews
May 17, 2020Programming
Service Upgrade for "ip.renfei.net" — Now Supports IPv4/IPv6 Networks
This "ip.renfei.net" upgrade supports not only IPv4 networks but also IPv6 networks, so the JSON you get may be an IPv4 or an IPv6 address. Developers, please update your programs to recognize it. If you only want to query an IPv4 address, use "ipv4.renfei.net", which supports IPv4 only.
NetworkProgrammingDevelopmentDNSOps
May 15, 2020Uncategorized
Looking for Users of "ip.renfei.net" — Your Requests Are Too Fast
ip.renfei.net pairs with DDNS dynamic DNS resolution for resolving dynamic IPs. In a dynamic-IP environment, it conveniently updates domain resolution records in time. On Linux, use curl ip.renfei.net to quickly query the public outbound IP. In a browser, use JavaScript to request ip.renfei.net to get the user's public IP address.
DomainNetworkProgrammingDevelopmentWebsiteOpsServer
May 11, 2020Software
Navicat Premium 15.0.15 for Mac OS X [TNT]
Navicat Premium merges all Navicat versions into one ultimate version, able to connect to MySQL, Oracle, and PostgreSQL. Navicat Premium lets users drag tables and data from Oracle to MySQL, Postgre...
ProgrammingDevelopmentCodeDatabaseMySQLSQLSoftware
April 15, 2020Programming
Resolving the SLF4J Warning "Class path contains multiple SLF4J bindings" — logback and log4j Package Conflict
The SLF4J warning "Class path contains multiple SLF4J bindings" appears in the run log, for example after referencing sdk.renfei.net in SpringBoot. Actually this is a Jar package conflict; you just need to exclude the conflicting Jar package.
ProgrammingDevelopmentJavaCode
April 13, 2020Programming
Chained Calls with func().then() in Vue.js and How Promise.resolve Works
In Vue.js development you'll encounter asynchronous-call scenarios, but sometimes you need to wait for the async to finish before the next step, which is where func().then() comes in. To use this pattern you need Promise. I'm writing this article because when I searched I found some people wrote it wrong, somewhat misleading others, so I'll write my own version.
ProgrammingDevelopmentCode
April 9, 2020Programming
Use the editor-fold Tag to Fold Your Code and Optimize Its Structure
In real work we often write very long class files, and code readability keeps getting worse. Think about scrolling up and down through hundreds or even over a thousand lines to find the piece of code you want — isn't there a more elegant way? Of course there is. Today I'm introducing the editor-fold tag to optimize your code structure.
ProgrammingDevelopmentJavaCodeIDEA