Tutorials

If your application allows the public to sign up, chances are your application will attract the "unkind" types and they….... read more

Golang : Remove dashes(or any character) from string

Problem :

You have a string with dashes in between and you want to remove all the dashes. How to….... read more

Golang : How to validate ISBN?

This tutorial will show you an example on how to validate ISBN with the govalidator package and then get the….... read more

Golang : Validate credit card example

Problem :

You have an e-commerce website and you want to validate the user credit card number before passing it….... read more

Golang : Validate IPv6 example

This tutorial is an enhancement of previous tutorial on how to determine if a given IP address is….... read more

Golang : How to validate URL the right way

Validating input from user or external sources is critical and needed to ensure that your program will not simply process….... read more

Golang : Disable security check for HTTPS(SSL) with bad or expired certificate

There are times when a webmaster failed to renew the certificates from SSL connection in time or some other reason….... read more

Fix sudo yum hang problem with no output or error messages

Encounter a weird error this morning while trying to execute sudo yum update command. Yum just hangs there and no….... read more

JavaScript : Rounding number to decimal formats to display currency

7th August 2015

Was looking for ways to round up float numbers to 2 decimal points and also to display currency with Javascript.….... read more

Facebook : How to force facebook to scrape latest URL link data?

7th August 2015

Problem :

When you try to put URL link on a Facebook input boxes and Facebook will automatically scrape a….... read more

Golang : Get timezone offset from date or timestamp

Problem :

You have a date or time stamp and you want get the time zone offset from the date.

Golang : Fix image: unknown format error

Problem :

You want to find out the dimension of an image file with image.DecodeConfig() function - to….... read more

Golang : Reset or rewind io.Reader or io.Writer

Problem :

You have read file with io.Reader till EOF. Or you want to rewrite a file with io.Writer again.….... read more

Golang : io.Reader causing panic: runtime error: invalid memory address or nil pointer dereference

Problem :

You read a file to retrieve some data with io.Reader, then when you attempt to read the same….... read more

Golang : Get dimension(width and height) of image file

If you need to open up an image file, be it jpeg, png or gif. Chances are you will need….... read more

Golang : Get RGBA values of each image pixel

Problem :

You need to find out each pixels R,G,B,A values on an image. Maybe to do ASCII art, edge….... read more

Golang : Get missing location after unmarshal binary and gob decode time.