Git

List the last commit of each branch, most recent first

git for-each-ref --sort=committerdate refs/heads/ --format='%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(contents:subject) - %(authorname) (%(color:green)%(committerdate:relative)%(color:reset))'

Delete all local git branches

git branch --merged master | grep -v master | xargs git branch -d

Ruby

Inject

Group multiple items in a hash, when the keys are created dynamically

commodities_per_material_types = production_weights.inject(Hash.new { |h, k| h[k] = [] }) do |memo, pw|
    memo[pw.material_type.name] << pw.actual_commodities
	memo
end

We have to use hash = Hash.new { |h, k| h[k] = [] } so that each call to an unknown key of the hash returns a different Array instance.

Atom

Enable ligature with non ligatured fonts

atom-text-editor::shadow .lines .keyword.operator {
    font-family: "FiraCode-Light";
    text-rendering: optimizeLegibility;
}

atom-text-editor::shadow .lines .cursor-line .keyword.operator {
    text-rendering: auto;
}

(stolen from: http://netcell.github.io/2016/05/ligature-with-unsupported-font-in-atom/) and to get the styling for Operator Mono https://gist.github.com/brandondurham/3828ac42766f9f187c8e

Styling to use Operator Mono:

atom-workspace,
atom-text-editor {
    font-family: "OperatorMono-Light";
    font-weight: normal;
}

atom-panel.tool-panel {
}

.editor .comment,
atom-text-editor.editor {
    font-family: "OperatorMono-Light";
    font-style: normal;
}

atom-text-editor.editor .syntax--comment {
    font-family: "OperatorMono-LightItalic";
    font-style: normal;
}

.syntax--keyword, .syntax--control, .syntax--attribute-name {
  font-style: italic;
}