hemashushu

WebAssembly 导学

提起 WebAssembly/Wasm 可能会想起它是一种可以在浏览器里运行 C/C++/Rust 的技术，实际上它是一个虚拟机标准，它的实现可以在 MCU（单片机）、移动设备、桌面电脑到服务器里面跑，可以嵌入到浏览器、嵌入到应用程序或者独立运行，没有具体的边界。

特点：

1. 编译一次到处可运行（有点类似JVM虚拟机），源语言可以是 C/C++，Rust，Go，Swift ，TypeScript，C#，Kotlin 等等。
2. 具体的功能依赖于导入的接口（Import API），否则只是一个单纯的运算器（栈式虚拟机）。目前接口主要有 Web JS 和 WASI 两种，前者用在浏览器里，后者可以作为独立应用程序（比如调用文件系统、socket 等）。
3. 在 WASM 虚拟机里，只能调用宿主导入的方法和共享的内存，无法直接调用宿主的资源（比如 Web DOM 对象、文件系统等），所以天然具有沙盘安全特性。
4. 性能很好，提供了接近本地程序的性能，同一段简单的 C 计算程序，以 WASM 方式运行大概慢 1 倍左右，相对一般动态语言慢几倍到上百倍来说，性能已非常突出。

comerford

storage:
    dbPath: "/data/db/300-mm"
    directoryPerDB: true
    journal:
        enabled: true
systemLog:
    destination: file
    path: "/data/db/300-mm/mongodb.log"
    logAppend: true
    timeStampFormat: iso8601-utc

bgrins

Javascript log Function

Every time I start a new project, I want to pull in a log function that allows the same functionality as the console.log, including the full functionality of the Console API.

There are a lot of ways to do this, but many are lacking. A common problem with wrapper functions is that the line number that shows up next to the log is the line number of the log function itself, not where log was invoked. There are also times where the arguments get logged in a way that isn't quite the same as the native function.

This is an attempt to once and for all document the function that I pull in to new projects. There are two different options:

• The full version: Inspired by the plugin in HTML5 Boilerplate. Use this if you are writing an application and want to create a window.log function. Additionally,