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Search and replace a line in a file in Python
...to memory. Then close the file, reopen it in writing mode and write the modified contents back.
The file is too large to be stored in memory; you can move it over to a temporary file and open that, reading it line by line, writing back into the original file. Note that this requires twice the storag...
MySQL get row position in ORDER BY
...LE t
WHERE t.name = 'Beta'
...will give ties the same value. IE: If there are two values at second place, they'll both have a position of 2 when the first query will give a position of 2 to one of them, and 3 to the other...
...
How to pass password automatically for rsync SSH command?
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If you can not use a keyfile, but do not want to include the password in the command, you can write it into a temporary file and include it like this: sshpass -p`cat .password` ssh [...]. Then protect your .password file by c...
How can I use UUIDs in SQLAlchemy?
...s there a way to define a column (primary key) as a UUID in SQLAlchemy if using PostgreSQL (Postgres)?
9 Answers
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Visual studio long compilation when replacing int with double
...I fiddled at the assembly code level, but I can easily believe this.
The difference between IEEE standard floating point ops and the ones implemented by a processor often forces linking in library routines to do the translation, while integer math can just use the CPU instructions. At the time the ...
sed edit file in place
I am trying to find out if it is possible to edit a file in a single sed command without manually streaming the edited content into a new file and then renaming the new file to the original file name. I tried the -i option but my Solaris system said that -i is an illegal option. Is there a d...
uwsgi invalid request block size
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It's not the correct solution. What if we want to unix sockets?
– Farsheed
Aug 21 '15 at 11:28
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Redis is single-threaded, then how does it do concurrent I/O?
...server-side software, concurrency and parallelism are often considered as different concepts. In a server, supporting concurrent I/Os means the server is able to serve several clients by executing several flows corresponding to those clients with only one computation unit. In this context, paralleli...
How to change an input button image using CSS?
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If you're wanting to style the button using CSS, make it a type="submit" button instead of type="image". type="image" expects a SRC, which you can't set in CSS.
Note that Safari won't let you style any button in the manner y...
Multiple inheritance for an anonymous class
...lasses must extend or implement something, like any other Java class, even if it's just java.lang.Object.
For example:
Runnable r = new Runnable() {
public void run() { ... }
};
Here, r is an object of an anonymous class which implements Runnable.
An anonymous class can extend another class ...