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| About
            Crystal’s syntax is heavily inspired by Ruby’s, so it feels natural to read and easy to write, and has the added benefit of a lower learning curve for experienced Ruby devs. Crystal is statically type-checked, so any type errors will be caught early by the compiler rather than fail on runtime. Moreover, and to keep the language clean, Crystal has built-in type inference, so most type annotations are unneeded. All types are non-nilable in Crystal, and available variables are represented as a union between the type and nil. As a consequence, the compiler will automatically check for null references in compile time. Crystal’s answer to metaprogramming is a powerful macro system, which ranges from basic templating and AST inspection to types inspection and running arbitrary external programs.
             | About
            The core of extensible programming is defining functions. Python allows mandatory and optional arguments, keyword arguments, and even arbitrary argument lists. Whether you're new to programming or an experienced developer, it's easy to learn and use Python. Python can be easy to pick up whether you're a first-time programmer or you're experienced with other languages. The following pages are a useful first step to get on your way to writing programs with Python! The community hosts conferences and meetups to collaborate on code, and much more. Python's documentation will help you along the way, and the mailing lists will keep you in touch. The Python Package Index (PyPI) hosts thousands of third-party modules for Python. Both Python's standard library and the community-contributed modules allow for endless possibilities.
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            Add charts to emails, reports, and anywhere else. Over 3 billion charts are rendered for users around the world. Generate chart images with a simple, open API. Our chart API generates chart images, QR codes, and more. We're built on Chart.js, the most popular open-source charting library. We'll render any Chart.js configuration. Start by putting your Chart.js definition in a URL. Let's get creative! You can use all static customization options available in Chart.js. Visit our chart gallery to see different chart types and plugins: bar charts, line graphs, pie charts, and much more. QuickChart easily integrates with many no-code tools. Use our no-code chart maker to create custom chart templates that you can embed dynamically in spreadsheets, Airtable, Bubble, AppSheet, Thunkable, and many other no-code tools. Rendering at scale is difficult and resource intensive. We've put a lot of working into taking care of the most difficult parts so you can focus on building your application.
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                Windows
            
            
         
            
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                On-Premises
            
            
         
            
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| Audience
        Developers in need of a powerful Programming Language solution
         | Audience
        Developers interested in a beautiful but advanced programming language
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        Companies and anyone seeking a solution to generate and render chart images 
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| Company InformationCrystal crystal-lang.org | Company InformationPython Founded: 1991 www.python.org | Company InformationQuickChart United States quickchart.io | ||||
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    Algoreus
            
            
         
            
                
    Apache DataFusion
            
            
         
            
                
    ExcelMaster.ai
            
            
         
            
                
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    Llama 4 Behemoth
            
            
         
            
                
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    PyMuPDF
            
            
         
            
                
    Replit Agent
            
            
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    Algoreus
            
            
         
            
                
    Apache DataFusion
            
            
         
            
                
    ExcelMaster.ai
            
            
         
            
                
    Inspector
            
            
         
            
                
    Llama 4 Behemoth
            
            
         
            
                
    Mage
            
            
         
            
                
    OpenPipe
            
            
         
            
                
    ProxyMesh
            
            
         
            
                
    PyMuPDF
            
            
         
            
                
    Replit Agent
            
            
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