IDE

Intellij

Search

• Search for files: Shift + Shift + Shift
• Search for word: Ctrl + Shift + R
• Find usages of: Alt+F7
• Show class hierarchy: Ctrl + H

Code Navigation

• Navigate to last point: Ctrl + Alt + <-
• Add bookmark: F12

Code Hints

• Show Error message: Ctrl + F1
• Auto Complete: Ctrl + Shift + Enter
• Show method definition snapshot: Ctrl + Shift + I

Code Completion

• Insert getter and setter: Alt + Insert

Vim

Mode

• command mode
  • type i -> insert mode
  • type : -> last-line mode
• insert mode
  • click Esc -> command mode
• last-line mode

Navigation

• in command mode
  • G moves to the last line.
  • gg moves to the first line.
  • 0 moves to beginning of line.
  • $ moves to end of line.
• in command mode
  • 上下左右：
    • use arrow key
    • k, j, h, l
  • 翻页上：
    • PGUP
    • Ctrl+B
  • 翻页下：
    • PGDN
    • Ctrl+F

Editing

• in command mode
  • dw will delete a character.
  • dd will delete a line.
  • u will undo the last operation.
  • Ctrl-r will redo the last undo.

Copy and Paste

• in command mode
  • v highlight one character at a time.
  • y copy text
  • d cut text
  • p paste text
  • "+y copy to system clipboard.
• refer to https://vim.fandom.com/wiki/Copy,_cut_and_paste

Search

• in command mode
  • /<String> search for String
  • n go to next matching pattern
  • N go to previous matching pattern
• set search highlight color
  • :set hlsearch
  • :nohlsearch
• show line number
  • :set number

Saving and Quiting

• in last line mode
  • :w for saving
  • :w filename for saving to another file
  • :q for quit
• in command mode
  • ZZ for saving and quit

Re-format a long line

• First set your vim so that it understands that you want 80 characters: :set tw=80
• then, hilight the line: V
• and make vim reformat it: gq