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Hiroaki Nakamura hnakamur

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@hnakamur
hnakamur / build.log
Created July 10, 2022 06:23
Non-comptime switch cases not allowed
$ zig test src/main.zig
./src/main.zig:11:28: error: cannot store runtime value in compile time variable
const d: u32 = c;
^
@hnakamur
hnakamur / mytask.yaml
Created May 15, 2022 06:28
trim spaces in ansible vairable using jinja2 if
---
- name: My playbook
hosts: localhost
vars:
zabbix_agentd_d_dir: >-
{% if ansible_facts['os_family'] == 'RedHat' -%}
/etc/zabbix/zabbix_agentd.d
{%- else -%}
/etc/zabbix/zabbix_agentd.conf.d
{%- endif %}
@hnakamur
hnakamur / a.js
Created May 3, 2022 01:48
atob(`DES9N7bxsOmHupY4JsjDg6fZ7vaFIZaWDBASiCj6vN+S
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apaRgEGCB8FZt3iSkE9EdmShv5vmSv3oMrCoSFlqnLeGY
9Wh6hNCNx4nUfxtzjoExo494fUr+hZebjFTo5ow//oy22
fW8fuwieImoEm7y28eFSmN5ITVpjzDabYQBjYPgRpLStG
jRMcsilxGH6Ud3nweSyqjimsCs6f2OL4JuoIfPTSVAP9/
hiab9VKmyBM3WbOVwAi+wLjoS6k1FcAcyjQo8HUM3v
GALSnPn7w+wnD5YNKRdXPVpQ8tq+stidQzFdESSzajS7
rPC81pzrIjW3tXOkrDmusp/mEzfTEHOsFRq9eq3kOJr+
CXXSOhjXuSSPVNH1rt8JIDUts529LqAb5pPfYta1L4bD
@hnakamur
hnakamur / main.rs
Last active April 14, 2022 01:35
Read a byte from stdin in rust
use std::io;
use std::io::prelude::*;
fn main() -> io::Result<()> {
let mut buffer = [0; 1];
loop {
let n = io::stdin().read(&mut buffer)?;
if n == 0 {
break;
}
@hnakamur
hnakamur / show-cert-info-file.sh
Created April 14, 2022 00:16
Print dates, subject, issuer, and SANs in a server certificate and intermediate certificates at a server or in a file.
#!/bin/bash
if [ $# -ne 1 ]; then
>&2 echo "Usage: $0 /path/to/cert_file"
exit 1
fi
cert_file="$1"
certs=$(cat $cert_file)
count=$(echo "$certs" | grep -c '^-----BEGIN CERTIFICATE-----')
i=1
@hnakamur
hnakamur / math.zig
Created April 2, 2022 15:29
modified std.math.cast to support .ComptimeInt as well as .Int
const std = @import("std");
const assert = std.debug.assert;
const maxInt = std.math.maxInt;
const minInt = std.math.minInt;
pub fn cast(comptime T: type, x: anytype) (error{Overflow}!T) {
comptime assert(@typeInfo(T) == .Int); // must pass an integer
comptime assert(@typeInfo(@TypeOf(x)) == .Int or
@typeInfo(@TypeOf(x)) == .ComptimeInt); // must pass an integer or comptimeint
if (x > maxInt(T)) {
@hnakamur
hnakamur / callback_example.zig
Created November 8, 2021 08:50
Zig minimal generic callback example (slimmed version of TigerBeetle IO struct)
pub const Transport = struct {
pub fn send(
self: *Transport,
comptime Context: type,
context: Context,
comptime callback: fn (
context: Context,
reuslt: usize,
) void,
) void {
@hnakamur
hnakamur / bm_test.go
Last active August 19, 2021 12:56 — forked from mipearson/bm_test.go
Add an increment of a global variable after each op to ensure the Go compiler isn't being clever about optimisation.
package bm
import (
"testing"
)
var mb = map[string]bool{
"alpha": true,
"beta": true,
"gamma": true,
@hnakamur
hnakamur / main.go
Created July 13, 2021 06:49
Go math/rand.NewZipf example
package main
import (
"fmt"
"log"
"math/rand"
"sort"
"time"
)
@hnakamur
hnakamur / apt-key-add
Created May 12, 2021 04:59
Alternative script for "apt-key add" which is deprecated in Ubuntu 20.10
#!/bin/bash
# apt-key-add - Alternative script for "apt-key add" which is deprecated in Ubuntu 20.10
#
# example:
# curl -fsSL https://deb.nodesource.com/gpgkey/nodesource.gpg.key | sudo apt-key-add - nodesource
# instead of
# curl -fsSL https://deb.nodesource.com/gpgkey/nodesource.gpg.key | sudo apt-key add -
#
set -e
if [ $# -ne 2 -o $UID -ne 0 ]; then