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How do I use a custom Serializer with Jackson?
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As mentioned, @JsonValue is a good way. But if you don't mind a custom serializer, there's no need to write one for Item but rather one for User -- if so, it'd be as simple as:
public void serialize(Item value, JsonGenerator jgen,
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Is there any way to change input type=“date” format?
... differentiate between the over the wire format and the browser's presentation format.
Wire format
The HTML5 date input specification refers to the RFC 3339 specification, which specifies a full-date format equal to: yyyy-mm-dd. See section 5.6 of the RFC 3339 specification for more details.
This...
When and why are database joins expensive?
I'm doing some research into databases and I'm looking at some limitations of relational DBs.
7 Answers
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“Diff” an image using ImageMagick
...ort and sweet.
Note, your images need not be the same type. You can even mix JPEG, TIFF, PNG -- under one condition: the images should be of the same size (image dimension in pixels). The output format is determined by the output filename's extension.
Should you, for some reason, need a higher r...
How would Git handle a SHA-1 collision on a blob?
... having the same SHA-1 as another that is already in your repository. Question is, how would Git handle this? Simply fail? Find a way to link the two blobs and check which one is needed according to the context?
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Build a Basic Python Iterator
...e it returns a brand new iterator each time __iter__ is invoked. Trying to mix and match (an iterator that is implicitly reset when __iter__ is invoked) violates the protocols.
– ShadowRanger
Feb 24 '18 at 1:16
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How do I scroll the UIScrollView when the keyboard appears?
... to change the contentInset of the UIScrollView. It is a very elegant solution, because you do not have to mess with the contentSize.
Following code is copied from the Keyboard Programming Guide, where the handling of this issue is explained. You should have a look into it.
// Call this method som...
Rounded UIView using CALayers - only some corners - How?
In my application - there are four buttons named as follows:
14 Answers
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How can I restart a Java application?
How can I restart a Java AWT application? I have a button to which I have attached an event handler. What code should I use to restart the application?
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What is the difference between a shim and a polyfill?
...ren't used precisely on the web, including es5-shim. I think es5-shim is a mix of shims and polyfills by your definition.
– Matt Browne
Mar 4 '17 at 19:19
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