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  JSON unmarshal in GoLang

In almost all mainstream programming languages, there is either built-in or third-party library to support parse JSON data because it is so popular for organizing and transferring data among different services. In GoLang, the built in json package also provides functions for marshalling and unmarshalling JSON data. Marshalling GoLang struct to a JSON string is relatively simple, just need to call json.Marshal(), it's a bit complicated to unmarshal an arbitrary JSON string into a GoLang struct ob...

   GOLANG,JSON,UNMARSHAL,EMPTY INTERFACE     2019-11-09 21:57:30

  How to optimize MySQL insert statement

For a big data system, one problem is the data access efficiency, one more problem is that the data insertion is very slow. We had a service system, the data loading process would take 4-5 hours. This time consuming operation is risky since if the program is interrupted during the loading process, it might be rerun, this will be troublesome. So it's necessary to improve the insertion efficiency for big data systems. Here we provide two optimization suggestions. 1. Combine multiple insert stateme...

   MySQL,insert,optimization     2012-10-24 22:03:13

  C/C++ Pointer Declaration Syntax – It makes sense!

I never really liked the way pointers are declared in C/C++: int *a, *b, *c; // a, b and c are pointers to int The reason is that I am used to reading variable declarations as MyType myVar1, myVar2, myVar3; and I always read “int*” as the type “integer pointer”. I therefore wanted the following int* a, b, c; // a is a pointer to int, b and c are ints to mean that a, b and c all were of type int*, i.e. pointers to int. and I therefore found it slightly a...

   C,Pointer,Declaration,Attempt     2012-02-22 05:43:58

  Convert time to Unix time

Unix time is defined as the number of seconds that have elapsed since midnight Coordinated Universal Time (UTC), 1 January 1970,not counting leap seconds. It is used widely in Unix-like and many other operating systems and file formats. It is neither a linear representation of time nor a true representation of UTC. Unix time may be checked on some Unix systems by typing date +%s on the command line. Sometimes it's a bit difficult to compare times stored in different applications or systems with ...

   UNIX time, Oracle DATE, conversion, timestamp     2013-01-19 09:04:17

  5 Signs of a Great User Experience

If you've used the mobile social network Path recently, it's likely that you enjoyed the experience. Path has a sophisticated design, yet it's easy to use. It sports an attractive red color scheme and the navigation is smooth as silk. It's a social app and finding friends is easy thanks to Path's suggestions and its connection to Facebook. In short, Path has a great user experience. That isn't the deciding factor on whether a tech product takes off. Ultimately it comes down to how many ...

   Usef interface,Standard,Good UI,Criteria     2012-01-30 05:51:35

  No support of $.browser in jQuery 1.9

Starting from jQuery 1.9, $.browser is no longer supported to detect the nrpwser type and version. The substitute is $.support. In the newer jQuery 2.x versions, IE 6/7/8 are also not supported. If users want to support IE 6/7/8, they must use jQuery 1.9. If you want to fully support IE and want to use jQuery 1.9 and jQuery 2.0, the official solution is: <!--[if lt IE 9]> <script src='jquery-1.9.0.js'></script> <![endif]--> <!--[if gte IE 9]> <script src=...

   jQuery,$.browser,$.browser.version     2013-08-27 03:10:12

  Here is Surface Pro 4

Microsoft is holding a new product release event today in New York. The biggest excitement Microsoft brings us is the Surface Pro 4. The most advanced Microsoft tablet ever equipped with Windows 10. Here are the selling points of Surface Pro 4: Performance 6th generation of Intel Core processor 30% faster than Surface Pro 3 50% faster than MacBook Air Up to 15 G RAM Up to 1TB storage 8.4 mm. Thinnest Surface Pro ever Four USB 3.0 ports Two 4K display ports Ethernet One productive connection S...

   WINDOWS 10,SURFACE PRO 4,MICROSOFT     2015-10-06 10:39:57

  How big company CEOs spend their time in work

As a company's steer holder, the CEO or founder takes plenty of pressure ordinary people even cannot imagine. They usually need to deal with different aspects of daily operation of a company including technology, business, marketing, public relationship etc. Lots of meetings, negotiations and presentations are waiting for them every day. Hence time is a precious resource for them. Let's take a look at how these CEOs spend their time in their work. 1. Apple CEO Tim Cook Gets up at 3:45 am ...

   CEO,STEVE JOBS,TIM COOK,ELON MUSK,JACK MA,MARK ZUCKERBERG,PONY MA     2016-08-13 13:29:00

  One good way to use optional parameter in function

In GoLang, it doesn't support method overloading like in Java, hence sometimes it would be a headache to create functions to construct new structs with different parameters.  Normally, we would construct the new function as below when want to let others create a new struct instance with explicit function call. type Queue struct { Name string } func NewQueue(name string) *Queue { return &Queue{name} } But with the scope and complexity of the struct increases, there might be more prope...

   OPTION PATTERN,VARIADIC FUNCTION,OPTIONAL PARAMETER     2020-09-18 21:45:29

  Understand unsafe in GoLang

Before going to understand unsafe package in GoLang, the first thing needs to talk about is the pointer in GoLang. If you have a background of C language, you must know what pointer means and its usage. With pointer, you are free to operate any data at memory level which means you have great power, but this means that you have great responsibility as well. That's why it might be considered unsafe in lots of cases. Take a look at a simple example of doubling an integer. package main import "fmt"...

   GOLANG,UNSAFE,ZERO-COPY     2020-03-14 23:18:00

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