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Reading a plain text file in Java
...ame.txt"));
Scanner has several methods for reading in strings, numbers, etc... You can look for more information on this on the Java documentation page.
For example reading the whole content into a String:
StringBuilder sb = new StringBuilder();
while(in.hasNext()) {
sb.append(in.next());
}...
Filter dataframe rows if value in column is in a set list of values [duplicate]
... isin only works for perfect matched, it accepts dataframes, Series, Index etc.. @jakevdp provided a great solution here, which works to extract the matching values of df1, given another dataframe df2:stackoverflow.com/a/33282617/4752883. In my case, I have a df2, but the values in df2 wont be exact...
What is the difference between HAVING and WHERE in SQL?
... a minority queries would need to be rewritten using a derived table, CTE, etc but they would arguably be easier to understand and maintain as a result. Maybe vendors' optimizer code would need to be rewritten to account for this, again an opportunity for improvement within the industry.
Now consid...
Downloading a large file using curl
...URNTRANSFER has to be true in case you are getting file like pdf/csv/image etc.
You may find the further detail over here(correct url) Curl Doc
From that page:
curl_setopt($request, CURLOPT_TIMEOUT, 300); //set timeout to 5 mins
curl_setopt($request, CURLOPT_RETURNTRANSFER, true); // true to get...
How do you write a migration to rename an ActiveRecord model and its table in Rails?
... add_index :old_table_name, :column_name
end
end
And rename your files etc, manually as other answers here describe.
See: http://api.rubyonrails.org/classes/ActiveRecord/Migration.html
Make sure you can rollback and roll forward after you write this migration. It can get tricky if you get some...
Find and restore a deleted file in a Git repository
...he specified commit, so ~1 is the commit before, ~2 is two commits before, etc
– Nils Luxton
Sep 10 '12 at 15:07
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More elegant “ps aux | grep -v grep”
...command, e.g.
ps u -C gnome-terminal
(or search through /proc with find etc.)
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IPC performance: Named Pipe vs Socket
...(processAin, processAout, processBin, processBout, processCin, processCout etc)
Or you can go hybrid as always :)
Named pipes are quite easy to implement.
E.g. I implemented a project in C with named pipes, thanks to standart file input-output based communication (fopen, fprintf, fscanf ...) it ...
How to set my default shell on Mac?
...
1. sudo nano /etc/shells
2. add /usr/local/bin/fish to your list of shells
3. chsh -s /usr/local/bin/fish
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Equivalent of *Nix 'which' command in PowerShell?
....ps1. Using this answer, however, gives me the whole path (C:\Users\blah\etc\scripts\okta.ps1). So +1 from me.
– s-k-y-e---c-a-p-t-a-i-n
May 30 '19 at 18:40
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