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PHP prepend leading zero before single digit number, on-the-fly [duplicate]
...
You can use sprintf: http://php.net/manual/en/function.sprintf.php
<?php
$num = 4;
$num_padded = sprintf("%02d", $num);
echo $num_padded; // returns 04
?>
It will only add the zero if it's less than the required number of characters.
Ed...
8 种提升 ASP.NET Web API 性能的方法 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...WebAPI中响应的内容。
var response = Request.CreateResponse(HttpStatusCode.OK);
response.Content = new StringContent(jsonResult, Encoding.UTF8, "application/json");
return response;
你可以在 Rick Strahl’s blog查看更多方法
3)尽可能使用其它协议格式 (p...
How do I empty an array in JavaScript?
...an array that was already empty.
The following benchmark fixes this flaw: http://jsben.ch/#/hyj65. It clearly shows that methods #2 (length property) and #3 (splice) are the fastest (not counting method #1 which doesn't change the original array).
This has been a hot topic and the cause of a lot...
How to check if a user likes my Facebook Page or URL using Facebook's API
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You can use (PHP)
$isFan = file_get_contents("https://api.facebook.com/method/pages.isFan?format=json&access_token=" . USER_TOKEN . "&page_id=" . FB_FANPAGE_ID);
That will return one of three:
string true string false json
formatted response of error if token...
Draw on HTML5 Canvas using a mouse
...
Googled this ("html5 canvas paint program"). Looks like what you need.
http://dev.opera.com/articles/view/html5-canvas-painting/
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How to install a specific version of a ruby gem?
... gem sources, if it's empty, add a repo using this command: gem sources -a https://rubygems.org/
– Kokizzu
May 30 '14 at 1:28
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Android.app Fragments vs. android.support.v4.app using ViewPager?
...ar functionality to the sample provided on the Android Developer website ( http://developer.android.com/training/animation/screen-slide.html or http://developer.android.com/training/implementing-navigation/lateral.html ). Looking into their code, I've noticed they utilize the android.support.v4....
PHP “pretty print” json_encode [duplicate]
... = json_decode($string);
echo json_encode($json, JSON_PRETTY_PRINT);
See http://www.php.net/manual/en/function.json-encode.php
Note: Don't forget to echo "<pre>" before and "</pre>" after, if you're printing it in HTML to preserve formatting ;)
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How to write PNG image to string with the PIL?
...n on image")
byte_io = BytesIO()
image.save(byte_io, 'PNG')
Read more: http://fadeit.dk/blog/post/python3-flask-pil-in-memory-image
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is not JSON serializable
...objects:
data = serializers.serialize('json', self.get_queryset())
return HttpResponse(data, content_type="application/json")
In your case, self.get_queryset() contains a mix of django objects and dicts inside.
One option is to get rid of model instances in the self.get_queryset() and replace th...