Programming languages and software development
iOS automatically pauses video playback when you lock your device to save battery and comply with app guidelines. If you want to listen to audio from a video while your screen is locked — say, watching a music video or podcast while walking — you need to enable background audio mode in your player app….
Taking photos with iPhone earphone remotes provides a practical way to reduce hand shake and camera blur, especially useful for self-portraits, group photos, or situations where you need stable hands-free operation. How to Trigger the Camera Press the volume-up button on your earphone remote to capture a photo. This works with the native Camera app…
The /b/ segment in fclose.com URLs is a legacy artifact from the site’s original architecture. It originally designated the “blog” section when the site was first established as a blogging platform. Over time, fclose.com evolved beyond a pure blog to include multiple content types—forums, tutorials, Q&A sections, and other resources. The /b/ prefix was retained…
GNOME Keyring stores passwords, SSH keys, and certificates. If you need to update your keyring password, you can do this through the Seahorse graphical interface or directly from the command line. Using Seahorse (GUI Method) Seahorse is GNOME’s visual keyring manager. Open it with: seahorse Once open: Go to the View menu and select By…
If you’re creating posters—whether for conferences, events, or general communication—you’ll want the right tools and guidance. Here’s a practical breakdown of what works. Design Software Inkscape is your go-to for vector-based design. It’s free, open-source, and handles logos, text, and scalable graphics without quality loss. Use it when you need clean lines, precise shapes, or…
No special meaning here. “fclose” is simply a function that anyone working with C or systems programming will recognize immediately. For those unfamiliar with it, fclose() is a standard C library function that closes a file stream. It’s defined in stdio.h and takes a FILE* pointer as an argument: #include <stdio.h> int main() { FILE…
When you’re fighting page limits — conference submissions, journal requirements, or just fitting content on a poster — reducing LaTeX’s default spacing is essential. Here are the practical approaches, from gentle to aggressive. Basic Spacing Adjustments Start with the most impactful changes. These target the whitespace around floats (figures, tables) and captions: \setlength{\textfloatsep}{1pt} % Space…
If you need server imagery for documentation, presentations, or technical content, here are reliable sources for free-to-use assets: Vector Graphics and Icons Wikimedia Commons offers a solid collection of server-related SVG files under open licenses: Multiple servers Single server Color variants (yellow, green, and others) These are ideal for diagrams, documentation, and architectural drawings since…
This post addresses a fair question: with Stack Overflow, Reddit, and countless other Q&A platforms already established, why create a dedicated Q&A space? There are three practical reasons. Short-form technical tips Some knowledge doesn’t warrant a full blog post. A 2000-word article dilutes what should be a focused tip. Q&A format works better for these…
The hex() function converts an integer to a hexadecimal string with a 0x prefix: i = 255 print(hex(i)) # Output: 0xff This works for negative numbers too: print(hex(-42)) # Output: -0x2a String formatting for control For more control over the output, use f-strings or the format() method with format specifiers: i = 255 print(f”Value: {i:x}”)…
To enable debugging, configure your CMake build with CMAKE_BUILD_TYPE set to Debug. This tells CMake to invoke the compiler with the -g flag, generating debug symbols that tools like gdb and lldb need. From your project’s root directory: cmake -DCMAKE_BUILD_TYPE=Debug -B build cd build make The -B build flag creates a separate build directory, which…
The x86-64 architecture on Linux follows the System V AMD64 ABI calling convention. Understanding this is essential when writing assembly, optimizing code, debugging, or interfacing with C libraries. Register usage for arguments Integer and pointer arguments use these registers in order: RDI — first argument RSI — second argument RDX — third argument RCX —…
The strcmp() and strncmp() functions are fundamental string comparison utilities in the C standard library. Understanding their implementations reveals important aspects of character comparison, null-termination handling, and performance optimization. strcmp Implementation The glibc implementation of strcmp() performs lexicographic comparison of two null-terminated strings, returning: A negative value if the first string is lexicographically less than…
There are several ways to determine a file’s size in C, each with different trade-offs. Choose based on whether you have a file descriptor, stream, or just the filename. Using stat() with a Filename If you know the filename, stat() is the most straightforward approach: #include <sys/stat.h> #include <stdio.h> int main(const char *filename) { struct…
Converting strings to long integers is fundamental in C. The standard library provides strtol(), strtoul(), strtoll(), and strtoull() for this purpose. These functions handle the conversion robustly and let you detect parsing errors through their return value and endptr argument. Function Signatures All four functions share a similar interface: long strtol(const char *str, char **endptr,…
ANSI C is the standardized version of C defined in 1989, specifying the language’s syntax and semantics formally through a grammar. Understanding this grammar is essential for building tools that parse, analyze, or transform C code. Grammar Basics The ANSI C grammar is defined using Backus-Naur Form (BNF), a notation for specifying formal grammars. The…
The claim that scanf is dangerous gets thrown around frequently, but the reasons aren’t always clear. Most people point to %s causing buffer overflows and recommend fgets as the solution. That’s part of it, but not the core problem. The real issues with scanf break down into two categories: string handling and arithmetic input. String…
When you need to download a video playing in your browser, Chrome offers several solid options depending on your workflow and the video source. Browser Extensions Video Download Helper is a reliable choice for Chrome that works across most video hosting platforms. Install it from the Chrome Web Store and use it to capture videos…
If you’re running a site with limited resources, a free CDN can significantly improve performance and reduce bandwidth costs. Here are the current options worth considering. Cloudflare https://www.cloudflare.com Cloudflare remains the most popular free CDN choice for good reason. Their free tier includes: Global edge network with automatic content caching and optimization DDoS protection and…
WordPress’s Text/HTML editor can be extended with custom buttons for frequently used code snippets or shortcodes. This is useful for inserting boilerplate markup, custom shortcodes, or formatting helpers without manually typing them each time. Basic Implementation Add this code to your theme’s functions.php or a custom plugin: function add_custom_quicktags() { wp_add_inline_script( ‘quicktags’, “QTags.addButton(‘wiki_button’, ‘Wiki’, ‘[yadawiki…