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Rust Error Handling Cheatsheet - Result handling functions

Introduction to Rust error handling

Rust error handling is nice but obligatory. Which makes it sometimes plenty of code.

Functions return values of type Result that is "enumeration". In Rust enumeration means complex value that has alternatives and that alternative is shown with a tag.

Result is defined as Ok or Err. The definition is generic, and both alternatives have

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#!/usr/bin/env bash

function for_all_test_files { find $(go list -f '{{ .Dir }}' ./...) -name '*_test.go' ; }
function first_line_of_test { xargs -n1 awk '/^func Test/{getline; print FILENAME ":" NR-1 " " $0}' ; }
function not_parallel       { grep -v 't.Parallel()' ; }

if for_all_test_files | first_line_of_test | not_parallel
then
	echo FAIL: not all tests call t.Parallel
	exit 1

tsauvajon

### REINIT
DELETE user
PUT user
{
  "settings": {
    "number_of_shards": 1
  }, 
  "mappings": {
    "_doc": {
      "properties": {

tsauvajon

.cover {
  position: fixed;
  width: 100%;
  top: 0;
  left: 0;
  z-index: 1100; /* just above title bar */
  transition: opacity 0.2s ease-in-out;
  opacity: 1;

  /* Permalink - use to edit and share this gradient: http://colorzilla.com/gradient-editor/#5dc1b2+0,1fbcd2+100 */