大约有 43,000 项符合查询结果（耗时：0.0520秒） [XML]
Negative matching using grep (match lines that do not contain foo)
...s your friend:
grep --help | grep invert
-v, --invert-match select non-matching lines
Also check out the related -L (the complement of -l).
-L, --files-without-match only print FILE names containing no match
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How to switch databases in psql?
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You can select the database when connecting with psql. This is handy when using it from a script:
sudo -u postgres psql -c "CREATE SCHEMA test AUTHORIZATION test;" test
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How to disable manual input for JQuery UI Datepicker field? [duplicate]
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This solution does not let me clear the selected date.
– Anders Lindén
Oct 6 '16 at 11:26
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Extract every nth element of a vector
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To select every nth element from any starting position in the vector
nth_element <- function(vector, starting_position, n) {
vector[seq(starting_position, length(vector), n)]
}
# E.g.
vec <- 1:12
nth_element(vec, ...
How to disable scientific notation?
I have a dataframe with a column of p-values and I want to make a selection on these p-values.
1 Answer
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CSS rule to apply only if element has BOTH classes [duplicate]
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So, this will not select <div class="abc"> because it lacks xyz?
– Majid Fouladpour
Apr 26 '11 at 21:30
5
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Emacs Ruby autocomplete almost working
...e. This works well in most files except I've found it doesn't allow me to select an answer from the table when I'm editing some code in my ruby on rails project.
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ORA-01950: no privileges on tablespace 'USERS' [closed]
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and how can I know (select?) current quota for a given <user> ??
– downtheroad
Nov 30 '18 at 19:01
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Altering column size in SQL Server
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Select table--> Design--> change value in Data Type shown in following Fig.
Save tables design.
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How can I set a website image that will show as preview on Facebook?
...press just scroll down to the bottom of the webpage when in edit mode, and select "featured image" (bottom right side of screen).
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