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Best practices for SQL varchar column length [closed]
...ole table, see e.g. here. Since 9.2 this is no longer the case and a quick test confirmed that increasing the column size for a table with 1.2 million rows indeed only took 0.5 seconds.
For Oracle this seems to be true as well, judging by the time it takes to alter a big table's varchar column. Bu...
Should I use document.createDocumentFragment or document.createElement
...are appended.
Take the case of:
var ul = document.getElementById("ul_test");
// First. add a document fragment:
(function() {
var frag = document.createDocumentFragment();
var li = document.createElement("li");
li.appendChild(document.createTextNode("Document Fragmen...
Set select option 'selected', by value
...r]).attr('selected','selected'); which also worked well for all browsers I tested.
– Lee Fuller
Nov 29 '15 at 17:18
...
In Django, how do I check if a user is in a certain group?
...']).exists()
Note that those functions can be used with the @user_passes_test decorator to manage access to your views :
from django.contrib.auth.decorators import login_required, user_passes_test
@login_required
@user_passes_test(is_member) # or @user_passes_test(is_in_multiple_groups)
def myvie...
Getting started with Haskell
... bit more difficult in Haskell. Check this SO question in case you want to test your solutions with QuickCheck (see Intermediate below).
Once you have done a few of those, you could move on to doing a few of the Project Euler problems. These are sorted by how many people have completed them, which i...
multiple prints on the same line in Python
... will count from 0% to 100% on one line. Final value will be:
> python test.py
100%
Additional info about flush in this case here: Why do python print statements that contain 'end=' arguments behave differently in while-loops?
...
What to do with branch after merge
...
Using Tower as my git front end, it neatly organizes all the Ftr/, Fix/, Test/ etc. into folders.
Once I am done with a branch, I rename them to Done/...-<description>.
That way they are still there (which can be handy to provide history) and I can always go back knowing what it was (fea...
how to read System environment variable in Spring applicationContext
...s a file:/// url.
So for example, if you have a config file located in
/testapp/config/my.app.config.properties
then set an environment variable like so:
MY_ENV_VAR_PATH=/testapp/config
and your app can load the file using a bean definition like this:
e.g.
<bean class="org.springframewo...
Converting HTML files to PDF [closed]
...endered HTML not strict XHTML. Though this can be mitigated with automated tests or some process that involves XML validation.
– SteveT
Jun 19 '13 at 13:43
3
...
SQL Server Insert if not exists
...ill sometimes fail, because a second connection can pass the IF NOT EXISTS test before the first connection executes the INSERT, i.e. a race condition. See stackoverflow.com/a/3791506/1836776 for a good answer on why even wrapping in a transaction doesn't solve this.
...