# Filter empty line with just \\r in it

**URL:** <https://discuss.elastic.co/t/filter-empty-line-with-just-r-in-it/35938>\
**Category:** Logstash\
**Created:** [November 30, 2015, 6:32pm UTC](https://discuss.elastic.co/t/filter-empty-line-with-just-r-in-it/35938 "2015-11-30T18:32:39Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![pesetskyps](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/pesetskyps/32/6264_2.png) [@pesetskyps](https://discuss.elastic.co/u/pesetskyps)\
**Post date:** [November 30, 2015, 6:32pm UTC](https://discuss.elastic.co/t/filter-empty-line-with-just-r-in-it/35938/1 "2015-11-30T18:32:39Z")

</div>

**Hi, there is a task to filter out the result with just "\r" in json represenmtation**  
 ![](https://us1.discourse-cdn.com/elastic/original/2X/1/16ff549230b36f4af33250aaf4176708d81e4d8f.png)

I tried the following code to filter:  
if [Message] =~ /^\r$/ {  
mutate {  
add\_field =\> {  
"new\_field" =\> "should be filtered"  
}  
}  
}

**But it also filters out he valid data like:**

 ![](https://us1.discourse-cdn.com/elastic/original/2X/0/016d1916b3c8106a2d97f3ebe4ca95c107bae96f.png)

if I try:  
if [Message] == "\r" {  
mutate {  
add\_field =\> {  
"new\_field" =\> "should be filtered"  
}  
}  
}

It filters nothing.

Can anyone advise?

---

<div class="post-metadata">

**Author:** ![vtst2412](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/vtst2412/32/6228_2.png) [@vtst2412](https://discuss.elastic.co/u/vtst2412)\
**Post date:** [November 30, 2015, 6:41pm UTC](https://discuss.elastic.co/t/filter-empty-line-with-just-r-in-it/35938/2 "2015-11-30T18:41:27Z")

</div>

Try `if [Message] == "\\r"`

```
irb(main):012:0> unescaped = "\r"
=> "\r"
irb(main):013:0> escaped = "\\r"
=> "\\r"
irb(main):014:0> puts unescaped

=> nil
irb(main):015:0> puts escaped
\r
=> nil
irb(main):016:0> escaped=="\r"
=> false
irb(main):017:0> escaped=="\\r"
=> true
irb(main):018:0>
```

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 5:20am UTC](https://discuss.elastic.co/t/filter-empty-line-with-just-r-in-it/35938/3 "2017-07-06T05:20:45Z")

</div>

Closed on July 6, 2017, 5:20am UTC