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400 vs 422 response to POST of data
... fall neatly into the existing categories.
This specification defines extra status codes developed for WebDAV
methods (Section 11)
And the description of 422 says:
The 422 (Unprocessable Entity) status code means the server
understands the content type of the request entity (hen...
How can I split a string into segments of n characters?
As the title says, I've got a string and I want to split into segments of n characters.
12 Answers
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Encoding an image file with base64
I want to encode an image into a string using the base64 module. I've ran into a problem though. How do I specify the image I want to be encoded? I tried using the directory to the image, but that simply leads to the directory being encoded. I want the actual image file to be encoded.
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Difference between “@id/” and “@+id/” in Android
...specifying a new resource ID and not needed for concrete resources such as strings or layouts. See the sidebox for more information about resource objects.
From: https://developer.android.com/training/basics/firstapp/building-ui.html
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MVC3 DropDownListFor - a simple example?
...d to map the value that is selected on this drop-down back into the simple string property on my view model?
4 Answers
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How can I check if a value is a json object?
...y server side code returns a value which is a json object on success and a string 'false' on failure. Now how can I check whether the returned value is a json object?
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Unable to access JSON property with “-” dash
I am unable to retrieve a value from a json object when the string has a dash character:
3 Answers
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Why were pandas merges in python faster than data.table merges in R in 2012?
... may have discovered a known issue in data.table when the number of unique strings (levels) is large: 10,000.
Does Rprof() reveal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (the algorithm), but a preliminary step.
Recent effo...
How to select the last record of a table in SQL?
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to get the last row of a SQL-Database use this sql string:
SELECT * FROM TableName WHERE id=(SELECT max(id) FROM TableName);
Output:
Last Line of your db!
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使用App Inventor扩展实现多点触控：Rotation Detector 旋转检测 · App Inventor 2 中文网
...eAngle((float) Math.atan2(v2y, v2x),v2x,v2y);
Log.i("Rotate", String.format("Vector1 (%f,%f) Vector2 (%f,%f)", v1x,v1y,v2x,v2y));
float angle = (float)Math.toDegrees(angle1-angle2);
return angle;
}
private float normalizeAngle(float angle,floa...