My favrite Vim commands

• search - /

• ignore case search - /\c

• search for pattern

 /word1\(.*word2\)\@=
/.*Word1.*word2  

• replace :   %s/word1/replaceword/gc 

• to append at end of line  :   %s/$/word/gc

• to append at begin of line  :  %s/^/word/gc

• to append newline character at end of line  :  %s/$/\r/gc

• to remove new line character  :  %s/\r//gc
• to enable Hex editing :%!xxd
• to go back in binary mode :%!xxd -r

• To remove all lines not having getDisplayName

1. replace othr lines with blank

    :%s#^\(.*getDisplayName.*\)\@!.*$##gc

    2.  remove blank lines 

    :v/\S/d
    3.  to remove all lines having getDisplayName

            just remove @! FROM SEARCH QUERY

• :vsp      " Vertically split the window

• " Changing Case use with \ 

•  lowercase line guu
•  uppercase line gUU
•  lowercase line Vu
•  uppercase line VU
•  flip case line g~~
•  Upper Case Word vEU
•  Flip Case Word vE~
•  lowercase entire file ggguG

• buffer commands

:bn (next buffer),
:bp (previous buffer)
:buffers (list open buffers)
:b (open buffer n)
:bd (delete buffer).
:e will just open into a new buffer

• Grep Command
• :vim[grep][!] /{pattern}/[g][j] {file} ... 
• :lvim /\<\(house\|home\)\>/gj *.txt 
• :lw list selected buffers in grep