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@helinwang
helinwang / string.md
Last active March 7, 2024 01:23
How to call go from c with string (char *) as the parameter without making a copy

Here is the gist for showing how to send string from c to go without a copy, for sending an float32 array from c to go without copy, please see here

Below is the documentation for converting between a c string and a go string:

// From https://golang.org/cmd/cgo/
// A few special functions convert between Go and C types by making copies of the data. 
// Go string to C string
// The C string is allocated in the C heap using malloc.
// It is the caller's responsibility to arrange for it to be
// freed, such as by calling C.free (be sure to include stdlib.h
@timgit
timgit / megaNumber.js
Last active January 15, 2020 08:35
Large number format filter for Angular written in ES6 that rounds to the specified decimal place (defaults to 1). 1 billion => 1B, 1,490,000 => 1.5M, 999,999 => 1M
angular.module('utilsModule').filter("megaNumber", () => {
return (number, fractionSize) => {
if(number === null) return null;
if(number === 0) return "0";
if(!fractionSize || fractionSize < 0)
fractionSize = 1;
var abs = Math.abs(number);
@samklr
samklr / install-proto.sh
Created April 20, 2015 08:19
Install Protobuf debian ...
#! /bin/bash
wget https://github.com/google/protobuf/releases/download/v2.6.1/protobuf-2.6.1.tar.gz
tar xzf protobuf-2.6.1.tar.gz
cd protobuf-2.6.1
sudo apt-get update
sudo apt-get install build-essential
sudo ./configure
sudo make
sudo make check
sudo make install
@wout
wout / gist:5188265
Last active July 29, 2021 18:04
Zoom in and out with svg viewbox for http://svgjs.dev
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8">
<title>svg.js</title>
<style type="text/css" media="screen">
#buttons {
position: absolute;
right: 0;