Tools
(For the index of Tools sub-pages see the parent page with its global index.)
Various tools
Drawing and diagramming
From text
PlantUML a popular tool for creating diagrams using a text DSL
Mermaid - another popular text DSL
Architecture Diagrams in Python - Diagram as Code - draw your cloud system architecture in Python code
WYSIWYG
yEd Graph Editor - "The interface is great. It’s portable. Lots of really cool tricks you can do with diagramming and graph transformations. Many graph import/export options. It has a java-based version that’s just a jar file." Automatic layout algorithms.
diagrams.net and its open source desktop client - "very feature rich and touch screen friendly, nice sketch and comic effects". Exports/imports many formats.
Command line
Quickly jump to a directory based on frequency/clever substring matching:
z (zsh, bash) - “z is the new j, yo” - also j2 and the fish clone z-fish
DirB, Directory Bookmarks for Bash (home) – moving efficiently among favourite directories (
s <name>to create a bookmark for pwd,g <bookmark | relative/abs dir path>to enter a dir (⇒ works both for bookmarks and as a replacement for cd); also support for relative path bookmarks & more;sllists bookmakrs in the last used order)
Mini-notes
Bash
Loop with 0-padded numbers for a number of repetitions (using for and seq, from 1 to 50, outputting 01, 02, .., 50):
for i in $(seq -f '%02g' 1 50); do echo $i; doneBasic math in Bash (addition, ..; using let for a numerical var and $<expression> for math):
let num=0; echo $num; INC="1"; num=$((num+$INC)); echo $num
Git
Undo merge: git reset –hard ORIG_HEAD (the pointer ORIG_HEAD is set automatically by Git)
Unfo file changes: git co – path/to/file/to/reset [other/files/..]
git whatchanged master..
Vim - useful advanced commands
Change/delete a text region
(d|c)i<delim> - Delete|change text up to the given delimiting character; requires that you are inside pair delimiters such as “…” or (…); use ‘a’ to include the delimiters
Operations on selections (⇒ y to copy (yank), dto delete)
Select lines (e.g. for deletion via ‘d’): S-V
Select rectangle (e.g. to delete whitespace): C-V
Search and replace with confirmation: :%s/foo/bar/gc
jq - sed for JSON
Ex.: Extract nested structure with select, filter combination
// INPUT
{"name":"Sony Xperia Z3 Black",
"dealerDetails":[
{"dealerGroup":"webshop","rank":3},{"dealerGroup":"CustomerCentre","rank":3}]}
// COMMAND
jq '. | {name: .name, rank: (.dealerDetails|map(select(.dealerGroup == "webshop"))[0].rank)}'
// OUTPUT
{"name":"Sony Xperia Z3 Black","rank":3}