How to Put Signature on PDF Document/File ?
Sometimes you need to fill in a form in PDF with signature. Of course, you can print the form out, fill them with pen and scan them into images. …
Category: tricks
Using Variable Substitution to Reference Another Variable in PHP and BASH Script
Not many programming languages support this kind of feature. We are not talking about substitution of the values in a string. Instead, we want to reference the variable using …
Avoid Magic Numbers by using Enum in C/C++
Using Magic Numbers is one of the causes of ugly code. For example, if you want to deal with two protocols, HTTP and FTP (to count the data packages), …
How to Use Array in Windows Batch Programming?
January 13, 2015
batch script, programming languages, tricks, windows, windows command shell
2 Comments
Can you use arrays in the simple windows batch programming? The answer is yes, but we have to use some tricks to emulate the arrays. @echo off :: helloacm.com …
How to Disable [Power, Sleep, Wakeup] Buttons at Keyboard on Windows?
![How to Disable [Power, Sleep, Wakeup] Buttons at Keyboard on Windows?](https://helloacm.com/wp-content/uploads/2014/12/old-at-port-keyboard-with-power-sleep-wakeup-buttons-300x200.jpg "How to Disable [Power, Sleep, Wakeup] Buttons at Keyboard on Windows?")
If you are lucky enough to get one of those Vintage keyboards (e.g. AT port), then it might be interesting to notice that there are three buttons which can’t …