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What is a “slug” in Django?
When I read Django code I often see in models what is called a "slug". I am not quite sure what this is, but I do know it has something to do with URLs. How and when is this slug-thing supposed to be used?
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Public Fields versus Automatic Properties
...t a variable. A usual thing to do is to declare a local variable (possibly read the property an put its value into the local variable), pass the local variable as ref/out, and then set the property to the value the local variable then has. But then the method called does not itself access the proper...
How do I get the size of a java.sql.ResultSet?
...nn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
– BullyWiiPlaza
Feb 21 '17 at 13:55
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SQL - many-to-many table primary key
This question comes up after reading a comment in this question:
5 Answers
5
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How to delete and replace last line in the terminal using bash?
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echo a carriage return with \r
seq 1 1000000 | while read i; do echo -en "\r$i"; done
from man echo:
-n do not output the trailing newline
-e enable interpretation of backslash escapes
\r carriage return
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How to open a local disk file with JavaScript?
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Here's an example using FileReader:
function readSingleFile(e) {
var file = e.target.files[0];
if (!file) {
return;
}
var reader = new FileReader();
reader.onload = function(e) {
var contents = e.target.result;
displayContents(...
How do you keep user.config settings across different assembly versions in .net?
...Settings.Default.UpgradeRequired = false;
Settings.Default.Save();
}
Read more about the Upgrade method at MSDN. The GetPreviousVersion might also be worth a look if you need to do some custom merging.
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What are the best practices for SQLite on Android?
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Inserts, updates, deletes and reads are generally OK from multiple threads, but Brad's answer is not correct. You have to be careful with how you create your connections and use them. There are situations where your update calls will fail, even if your ...
Renaming files in a folder to sequential numbers
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Beauty in one line:
ls -v | cat -n | while read n f; do mv -n "$f" "$n.ext"; done
You can change .ext with .png, .jpg, etc.
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SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?
... matches between the two tables, as use of indexes means it doesn't bother reading all the rows on one of the tables. a full outer join must always read all rows in both tables (or the relevant indexes). In the case where indexes are not enough, or an underlying heap has to be read to output the nee...