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Creating a dynamic choice field
... self.fields['waypoints'] = forms.ChoiceField(
choices=[(o.id, str(o)) for o in Waypoint.objects.filter(user=user)]
)
from your view while initiating the form pass the user
form = waypointForm(user)
in case of model form
class waypointForm(forms.ModelForm):
def __in...
Understanding the ngRepeat 'track by' expression
...
You can track by $index if your data source has duplicate identifiers
e.g.: $scope.dataSource: [{id:1,name:'one'}, {id:1,name:'one too'}, {id:2,name:'two'}]
You can't iterate this collection while using 'id' as identifier (duplicate id:1).
WON'T WORK:
<element ng-repeat="item...
How to efficiently compare two unordered lists (not sets) in Python?
a & b should be considered equal, because they have exactly the same elements, only in different order.
10 Answers
...
How to make Google Chrome JavaScript console persistent?
...ilding a dynamic site, I need to track the changes between pages, ie. Ajax calls, POST, GET stuff and similar stuff.
5 Answ...
How to validate an Email in PHP?
...5.3.0, the regex extension is deprecated in favor of
the PCRE extension. Calling this
function will issue an E_DEPRECATED
notice. See the list of differences
for help on converting to PCRE.
Note:
preg_match(), which uses a Perl-compatible regular expression
syntax, is often a faster...
TypeScript typed array usage
...or. In C# this would allocate an array of 100 elements. In JavaScript this calls the value at index 100 of Thing as if was a constructor. Since that values is undefined it raises the error you mentioned. In JavaScript and TypeScript you want new Array(100) instead.
You should report this as a bug o...
Find a Pull Request on Github where a commit was originally created
... here:
http://joey.aghion.com/find-the-github-pull-request-for-a-commit/
Call it like pr_for_sha <COMMIT> and it will open the corresponding github pull request page in a browser.
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How to get div height to auto-adjust to background size?
How do I get a div to automatically adjust to the size of the background I set for it without setting a specific height (or min-height) for it?
...
How to compile without warnings being treated as errors?
...iable" been treated as error. You can add a statement:
KBUILD_CFLAGS += $(call cc-option,-Wno-error=unused-but-set-variable,)
in your Makefile
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How to 'insert if not exists' in MySQL?
...Imagine we have a table:
CREATE TABLE `transcripts` (
`ensembl_transcript_id` varchar(20) NOT NULL,
`transcript_chrom_start` int(10) unsigned NOT NULL,
`transcript_chrom_end` int(10) unsigned NOT NULL,
PRIMARY KEY (`ensembl_transcript_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
Now imagine t...