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Find duplicate lines in a file and count how many time each line was duplicated?
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If you want to only print duplicate lines, use 'uniq -d'
– DmitrySandalov
Sep 3 '14 at 1:20
6
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What does |= (single pipe equal) and &=(single ampersand equal) mean
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@ChrisS ^= bit will set the bit if it was not already set, &= ~bit does not set it.
– Chronicle
Mar 17 '19 at 11:15
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Can I force pip to reinstall the current version?
...ce-reinstall <package>
When upgrading, reinstall all packages even if they are already up-to-date.
pip install -I <package>
pip install --ignore-installed <package>
Ignore the installed packages (reinstalling instead).
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Is there a “goto” statement in bash?
..." statement in bash ? I know It is considered bad practice, but I need specifically "goto".
12 Answers
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What is the difference between “Class.forName()” and “Class.forName().newInstance()”?
What is the difference between Class.forName() and Class.forName().newInstance() ?
9 Answers
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Why do we need C Unions?
... float to integer works? I don`t think so, as int and float are stored in different formats in memory. Can you explain your example?
– spin_eight
Oct 10 '12 at 10:51
3
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Joins are for lazy people?
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Joining in the app server can be more efficient if joining on the database causes severe redundancy in the result set sent over the network. Consider tables A and B, where each row in A is associated with 20 rows in B, B has only 100 rows, and we want to fetch the first 10...
Benchmarking small code samples in C#, can this implementation be improved?
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Here is the modified function: as recommended by the community, feel free to amend this its a community wiki.
static double Profile(string description, int iterations, Action func) {
//Run at highest priority to minimize fluctuations ...
Java “user.dir” property - what exactly does it mean?
...ectory. It can be anywhere where the user has permission to run java.
So if you cd into /somedir, then run your program, user.dir will be /somedir.
A different property, user.home, refers to the user directory. As in /Users/myuser or /home/myuser or C:\Users\myuser.
See here for a list of syste...
Jinja2 template variable if None Object set a default value
How to make a variable in jijna2 default to "" if object is None instead of doing something like this?
9 Answers
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