analog command grep -o in Powershell

Question

What command in Powershell replaces grep -o (which displays only the matched portion of a line instead of a whole line) ? i try use Select-Object but it always display full line. For example:

next line

<a id="tm_param1_text1_item_1" class="tm_param1param2_param3 xxx_zzz qqq_rrrr_www_vv_no_empty" >eeee <span id="ttt_xxx_zzz">0</span></a>

use next command:

cat filename  | grep -o '>[0-9]' | grep -o '[0-9]'

output: 0

When i use Select-Object i always see full line (

Answer 1

One way is:

$a = '<a id="tm_param1_text1_item_1" class="tm_param1param2_param3 xxx_zzz qqq_rrrr_www_vv_no_empty" >eeee <span id="ttt_xxx_zzz">0</span></a>'

$a -match '>([0-9])<' #returns true and populate the $matches automatic variable

$matches[1] #returns 0

Answer 2

For selecting strings in text, use select-string rather than select-object. It will return a MatchInfo object. You can access the matches by querying the matches property:

$a = '<a id="tm_param1_text1_item_1" class="tm_param1param2_param3 xxx_zzz qqq_rrrr_www_vv_no_empty" >eeee <span id="ttt_xxx_zzz">0</span></a>'
($a | select-string '>[0-9]').matches[0].value # returns >0