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AngularJS: Is there any way to determine which fields are making a form invalid?
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The exposed properties are $pristine, $dirty, $valid, $invalid, $error.
If you want to iterate over the errors for some reason:
$scope.someForm.$error
// > { required: [{$name: "username", $error: true /*...*/},
// {$name: "password", /*..*/}] }
Each rule in error will be exp...
Is “for(;;)” faster than “while (TRUE)”? If not, why do people use it?
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It's not faster.
If you really care, compile with assembler output for your platform and look to see.
It doesn't matter. This never matters. Write your infinite loops however you like.
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Is it safe to parse a /proc/ file?
... on what property you want. But it's easy to end up with bugs in your code if you assume too much about the consistency of a file in /proc. For example, see this bug which came from assuming that /proc/mounts was a consistent snapshot.
For example:
/proc/uptime is totally atomic, as someone menti...
Failure [INSTALL_FAILED_ALREADY_EXISTS] when I tried to update my application
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If you install the application on your device via adb install you should look for the reinstall option which should be -r. So if you do adb install -r you should be able to install without uninstalling before.
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How to evaluate http response codes from bash/shell script?
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This does not show the final request status if the result of the first request is a 3XX. For example if the returned value is a 301 redirect, then this script just stops there. If you add -IL, then you can get the final status. If you want to show all HTTP statuses ...
How do I use Django templates without the rest of Django?
...asy to find. (I had to dig around -- it didn't come up when I tried a few different Google searches.)
The following code works:
>>> from django.template import Template, Context
>>> from django.conf import settings
>>> settings.configure()
>>> t = Template('My n...
How can jQuery deferred be used?
...he best use case I can think of is in caching AJAX responses. Here's a modified example from Rebecca Murphey's intro post on the topic:
var cache = {};
function getData( val ){
// return either the cached value or jqXHR object wrapped Promise
return $.when(
cache[ val ] ||
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How does autowiring work in Spring?
... have only one instance of the bean, which is injected in multiple places. If you explicitly define the scope to be "prototype", then multiple instances will exist, possibly lazy (depending on configuration)
– Bozho
Jan 22 '13 at 11:23
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Favourite performance tuning tricks [closed]
...or example, comes with a host of performance monitoring / tuning bits, but if you don't have anything like that (and maybe even if you do) then I would consider the following...
99% of problems I have seen are caused by putting too many tables in a join. The fix for this is to do half the join (wi...
glob exclude pattern
...d Unix path expansion rules. There are only a few special characters: two different wild-cards, and character ranges are supported [from glob].
So you can exclude some files with patterns.
For example to exclude manifests files (files starting with _) with glob, you can use:
files = glob.glob(...