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Dealing with “Xerces hell” in Java/Maven?
...ry glance at the other Xerces questions on SO seem to indicate that almost all Maven users are "touched" by this problem at some point. Unfortunately, understanding the problem requires a bit of knowledge about the history of Xerces...
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Ajax, back button and DOM updates
...r navigates to page B and then hits back button to get back to the page A. All modifications to DOM of page A are lost and user is presented with version that was originally retrieved from the server.
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Checkout old commit and make it a new commit [duplicate]
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with a large repo it takes awhile to delete all of the files and then check them all back out. I feel like git should have a way to revert to an old revision without having to delete everything. But that's just my opinion, this worked well for me and I didn't see a be...
UnicodeEncodeError: 'ascii' codec can't encode character u'\xa0' in position 20: ordinal not in rang
...read the Python Unicode HOWTO. This error is the very first example.
Basically, stop using str to convert from unicode to encoded text / bytes.
Instead, properly use .encode() to encode the string:
p.agent_info = u' '.join((agent_contact, agent_telno)).encode('utf-8').strip()
or work entirely i...
What's the best visual merge tool for Git? [closed]
...ss-platform (UNIX/Linux, OSX, Windows) diff/merge tool.
Here's how to install it on:
Ubuntu
Mac
Windows: "The recommended version of Meld for Windows is the most recent release, available as an MSI from https://meldmerge.org"
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Count(*) vs Count(1) - SQL Server
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There is no difference.
Reason:
Books on-line says "COUNT ( { [ [ ALL | DISTINCT ] expression ] | * } )"
"1" is a non-null expression: so it's the same as COUNT(*).
The optimizer recognizes it for what it is: trivial.
The same as EXISTS (SELECT * ... or EXISTS (SELECT 1 ...
Example:
SE...
git remote prune – didn't show as many pruned branches as I expected
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When you use git push origin :staleStuff, it automatically removes origin/staleStuff, so when you ran git remote prune origin, you have pruned some branch that was removed by someone else. It's more likely that your co-workers now need to run git prune to get rid of branches you...
Using IQueryable with Linq
...t;T>. Say, for example, you have a Products table, and you want to get all of the products whose cost is >$25.
If you do:
IEnumerable<Product> products = myORM.GetProducts();
var productsOver25 = products.Where(p => p.Cost >= 25.00);
What happens here, is the database loads ...
Copying a HashMap in Java
...ew HashMap<Integer,myObject>(myobjectListA);
This will create a (shallow) copy of the map.
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Difference between “read commited” and “repeatable read”
...n level of the .Net System.Transactions scope is serializable, and this usually explains the abysmal performance that results.
And finally, there is also the SNAPSHOT isolation level. SNAPSHOT isolation level makes the same guarantees as serializable, but not by requiring that no concurrent transac...