linux - grep: Invalid regular expression -


i have text file looks this:

haha1,haha2,haha3,haha4 test1,test2,test3,test4,[offline],test5 letter1,letter2,letter3,letter4 output1,output2,[offline],output3,output4 check1,[core],check2 num1,num2,num3,num4

i need exclude lines have "[ ]" , output them file without lines have "[ ]".

i'm using command:

grep ",[" loaded.txt | wc -l > newloaded.txt

but it's giving me error:

grep: invalid regular expression

use grep -f treat search pattern fixed string. replace wc -l grep -c.

grep -cf ",[" loaded.txt > newloaded.txt

if you're curious, [ special character. if don't use -f you'll need escape backslash.

grep -c ",\[" loaded.txt > newloaded.txt

by way, i'm not sure why you're using wc -l anyways...? problem description, sounds grep -v might more appropriate. -v inverts grep's normal output, printing lines don't match.

grep -vf ",[" loaded.txt > newloaded.txt

Comments

Post a Comment

Popular posts from this blog

python - Mongodb How to add addtional information when aggregating? -

i beginner , wrote line pipeline works, wanna add other information output, screen name , or number of tweets.i tried add under $group gave me syntax error everytime here pipeline: def make_pipeline(): # complete aggregation pipeline pipeline = [ { '$match': { "user.statuses_count": {"$gt":99 }, "user.time_zone": "brasilia" } }, { "$group": { "_id": "$user.id", "followers": { "$max": "$user.followers_count" } } }, { "$sort": { "followers": -1 } }, { "$limit" : 1 } ]; i using on example : { "_id" : objectid("5304e2e3cc9e684aa98bef97"), "text" : "first week of school on :p", "in_reply_to_status_id" : null, "retweet_count" : null, ...
Read more

java - Spring Data JPA: Why findOne(id) executing delete query internally? -

i have 1 application using @manytomany annotation link 2 different entities 1 parent entity. not sure if have implemented properly. when execute .findone() on parent entity's repository find it, @ first fetch data along executing delete queries internally delete record mapping table (a table jpa creates after adding @manytomany annotation.). following generated sql queries , code snippet: java class @entity @table(name = "inventory") public class inventory { @id long id; // many other properties @manytomany(fetch=fetchtype.lazy) private list<stream> streams; @manytomany(fetch=fetchtype.lazy) private list<subject> subjects; } there no other annotation i've put in stream , subject entity class link inventory class. when run app, create following tables: inventory stream subject inventory_stream inventory_subject (inventory_stream , inventory_subject, 2 tables created automatically, don't k...
Read more

java - Incorrect order of records in M-M relationship in hibernate -

Image
i have 4 records in bridge table in mysql database. using @manytomany in hibernate, accurate order of employees incorrect incorrect of projects. following required material figure out doing mistake. this source. @entity @table(name="project") public class projectbean { @id @generatedvalue @column(name="project_id") private int projectid; @column(name="title") private string projecttitle; @manytomany(mappedby="projects") private collection<employeebean> employees; public projectbean() { employees = new arraylist<employeebean>(); } //getters & setters } @entity @table(name="employee") public class employeebean { @id @generatedvalue @column(name="employee_id") private int employee_id; @column(name="first_name") private string ...
Read more