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Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...es. Also, not all situations are quite handled- for example, if you try to select from table foo while another transaction is dropping it and creating a replacement table foo, then the blocked transaction will finally receive an error rather than finding the new foo table. (Edit: this was fixed in o...
How to access parent scope from within a custom directive *with own scope* in AngularJS?
...;/p>
<p> Directive Content</p>
<sd-items-filter selected-items="selectedItems" selected-items-changed="selectedItemsChanged(selectedItems)" items="items"> </sd-items-filter>
<P style="color:red">Selected Items (in parent controller) set to: {{selectedI...
What does $$ mean in the shell?
...e mktemp option -t is now deprecated (I think because of problems with the char -). Use mktemp ${tempfoo}.XXXXXX these days. I take the liberty to update your post.
– Sebastian
Jan 10 '14 at 11:44
...
TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
...e database. pytest-django also supports this style of tests, which you can select using an argument to the django_db mark:
@pytest.mark.django_db(transaction=True)
def test_spam():
pass # test relying on transactions
...
Check if value exists in Postgres array
...
Simpler with the ANY construct:
SELECT value_variable = ANY ('{1,2,3}'::int[])
The right operand of ANY (between parentheses) can either be a set (result of a subquery, for instance) or an array. There are several ways to use it:
SQLAlchemy: how to filt...
Detect if value is number in MySQL
...
This should work in most cases.
SELECT * FROM myTable WHERE concat('',col1 * 1) = col1
It doesn't work for non-standard numbers like
1e4
1.2e5
123. (trailing decimal)
share
...
How to configure socket connect timeout
...ame problem by making the socket non-blocking and then putting the fd in a select/poll loop with a timeout value equal to the amount of time we are willing to wait for the connect to succeed.
I found this for Visual C++ and the explanation there also bends towards the select/poll mechanism I expla...
Display two files side by side
....txt does a better job than paste one.txt two.txt and removing diffs extra chars that are displayed with sed is trivial comparing with writing/remembering an awk script. Even with both as functions in .bash_rc longer != better, more readable, faster.. what is the advantage here?
...
TortoiseGit not showing icon overlays
...
It is probably a matter of sorting. The double-quote character is one of the first printable characters, so "DropboxExt1" comes before 1TortoiseNormal, but "1TortoiseNormal" comes before "DropboxExt1". I also tried removing the double-quote from the Dropbox's keys and it worked...
Weird Integer boxing in Java
... section 5.1.7:
If the value p being boxed is true,
false, a byte, a char in the range
\u0000 to \u007f, or an int or short
number between -128 and 127, then let
r1 and r2 be the results of any two
boxing conversions of p. It is always
the case that r1 == r2.
The discussion goes on...