comparing strings between 2 arrays [duplicate]

Question

I have 2 arrays like below.I only need those elements in $b whose names are not present in $a.As it can be seen,element names on $a and $b are not same.$b has full name whereas $a has only a part of the name.

$a="rohit","shikar","virat","ravindra"
$b="rohit : sharma","shikar : dhawan","virat : kohli","ajinx : rahane","ravi : ashwin"

I've tried to loop through $b and use operators like -contain,-match,-like but those do not work.

Please do not double post. You asked practically the same question yesterday and got some good answers. — arco444
– arco444, Commented Mar 26, 2015 at 13:06
Sorry about that.I only consumed the answer (using the -contains operator)from my earlier question.In that sense,this one appeared a different case to me as those operators do not work in this example.Thanks to all those who helped me with this problem. — Kumar
– Kumar, Commented Mar 27, 2015 at 11:47

mjolinor · Accepted Answer · 2015-03-26 12:54:32Z

0

Using a regex:

$a="rohit","shikar","virat","ravindra"
$b="rohit : sharma","shikar : dhawan","virat : kohli","ajinx : rahane","ravi : ashwin"

$a_regex = ‘(?i)(‘ + (($a |foreach {[regex]::escape($_)}) –join “|”) + ‘)’

$b -notmatch $a_regex

ajinx : rahane
ravi : ashwin

If you know there aren't going to be an regex metacharacters in $a that might need to be escaped, it can be as simple as:

$a="rohit","shikar","virat","ravindra"
$b="rohit : sharma","shikar : dhawan","virat : kohli","ajinx : rahane","ravi : ashwin"

$a_regex = $a -join '|'

$b -notmatch $a_regex

ajinx : rahane
ravi : ashwin

edited Mar 26, 2015 at 12:54

answered Mar 26, 2015 at 12:49

mjolinor

68.7k7 gold badges118 silver badges141 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

comparing strings between 2 arrays [duplicate]

1 Answer 1

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Linked

Related