I'm reading file using Less. I need to search for some text, but I would like to exclude some other text.
Is it possible to build expressions like
/someText OR another text
or its not supported ?
You can use regular expressions in less search.
/some text|another text
Related
I'm deobfuscating some code and I forget the operator to use a wildcard while searching for text in VSCode. By this I mean in VSCode whenever you search for code (CMD/CTRL + F), what is the character for a wild card (i.e searching for "date{WILDCARD HERE}" would return "date1","date2","date", etc.)
I don't recall a wildcard option (I've never used it at least). But the search feature supports using regular expressions.
Given your examples of date1, date2, date, etc. assuming it followed a pattern of date<n> where n is a number (or nothing in the case of just "date"), the regular expression of date[1-9]* should achieve what you want.
You can test the expression out on this site. Input the regular expression and some sample data and see how it matches.
I saw a SO post that says you can search using regex or an actual literal text on it to search multiline texts. But what if you want to (quickly) search two or three of words within a specified lines of text content?
For example, what if you want to search for multiline text area that contains "ruby" and "regex" (assuming you want to know where you took a note on your txt (or markdown or rich text format) file. you may want to search for "how to use regex in ruby" or "the ruby regex tutorial", right? )
Now you can use a simple (but redundant) regex like ruby(.*\n)+regex|regex(.*\n)+ruby. But to me it doesn't look beautiful. For three or more words, this kind of regex workaround increases its redundancy exponentially also, not good.
So is there a smarter way to do this? Thanks.
I would like to use a postgres tsquery on a column that has strings that all contain numbers, like this:
FRUIT-239476234
If I try to make a tsquery out of this:
select to_tsquery('FRUIT-239476234');
What I get is:
'fruit' & '-239476234'
I want to be able to search by just the numeric portion of this value like so:
239476234
It seems that it is unable to match this because it is interpreting my hyphen as a "negative sign" and doesn't think 239476234 matches -239476234. How can I tell postgres to treat all of my characters as text and not try to be smart about numbers and hyphens?
An answer from the future. Once version 13 of PostgreSQL is released, you will be able to do use the dict_int module to do this.
create extension dict_int ;
ALTER TEXT SEARCH DICTIONARY intdict (MAXLEN = 100, ABSVAL=true);
ALTER TEXT SEARCH CONFIGURATION english ALTER MAPPING FOR int WITH intdict;
select to_tsquery('FRUIT-239476234');
to_tsquery
-----------------------
'fruit' & '239476234'
But you would probably be better off creating your own TEXT SEARCH DICTIONARY as well as copying the 'english' CONFIGURATION and modifying the copy, rather than modifying the default ones in place. Otherwise you have the risk that upgrading will silently lose your changes.
If you don't want to wait for v13, you could back-patch this change and compile into your own version of the extension for a prior server.
This is done by the text search parser, which is not configurable (short of writing your own parser in C, which is supported).
The simplest solution is to pre-process all search strings by replacing - with a space.
I am trying to search for multiple words in text inclusively(AND operation)
without losing word stemming.
For example:
db.supplies.runCommand("text", {search:"printers inks"})
should return results with (printer and ink) or (printers ink) or (printers ink) or (printers inks) , instead of all results with either printer or ink.
This post covers the search for multiple words as an AND operation, but the solution doesn't search for stemmed words ->MongoDB Text Search AND multiple search words.
The only way I could think of is creating a permutation of all the words and then running the search for the number of permutations(which could be large)
This may not be an effective way to search on a large collection.
Is there a better and smarter way to do it ?
So is there a reason you have to use a text search? If it were me i would use a regular expression.
https://docs.mongodb.com/manual/reference/operator/query/regex/
Off the top of my head something like this.
db.collection.find({products:/printers inks|printers|inks/})
Now i suppose you can do the same thing with a text search too.
db.collection.find({$text:{$search : "\"printers inks\" printers inks"}})
note the escaped quotes.
For example for:
https://api.vk.com/method/newsfeed.search.json?q=moscow
What can I do with the search query?
Does it support AND, OR, etc?
Can I specify exact terms in quotes, e.g.
q="Big Ben" ?
Is there a page where this is documented?
Thanks.
Search terms are split on whitespace and they are AND'd together. Quoted terms are treated as a phrase. There is no support for OR or NOT logic.