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Biggest GWT Pitfalls? [closed]
...plement using GWT. Has anyone encountered any major pitfalls in using GWT (and GWT-EXT) that were unable to be overcome? How about from a performance perspective?
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Select all elements with “data-” attribute without using jQuery
...le (though not an array). Looping with for in will iterate over the length and item properties. Instead, use for of to iterate over properties designed to be iterated over
– Solvitieg
Mar 21 '19 at 4:30
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Android - startActivityForResult immediately triggering onActivityResult
... in my app using the call startActivityForResult(intent, ACTIVITY_TYPE) , and they are all working but one.
13 Answers
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How do I raise the same Exception with a custom message in Python?
...thon 3, check Ben's answer
To attach a message to the current exception and re-raise it:
(the outer try/except is just to show the effect)
For python 2.x where x>=6:
try:
try:
raise ValueError # something bad...
except ValueError as err:
err.message=err.message+" hello"
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How can I use UUIDs in SQLAlchemy?
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The sqlalchemy postgres dialect supports UUID columns. This is easy (and the question is specifically postgres) -- I don't understand why the other answers are all so complicated.
Here is an example:
from sqlalchemy.dialects.postgresql import UUID
from flask_sqlalchemy import SQLAlchemy
impo...
fatal error: malformed or corrupted AST file - Xcode
...e. In Xcode, go to Window->Organizer->Projects, select your project, and press the "Delete..." button next to "Derived data".
If this doesn't work, you can try to do a Product->Clean (Cmd+Shift+k).
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Convert Data URI to File then append to FormData
...ers. Part of the task is to extract an image file from the canvas object and append it to a FormData object for upload.
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What is the best way to programmatically detect porn images? [closed]
...lf-way decent at detecting porn, but it's bad at detecting clean pictures. And I wouldn't be surprised if no major leaps were made in this area in the near future.
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What characters do I need to escape in XML documents?
... to escape all five characters in text. However, the three characters ", ' and > needn't be escaped in text:
<?xml version="1.0"?>
<valid>"'></valid>
Attributes
The safe way is to escape all five characters in attributes. However, the > character needn't be escaped in ...
DropDownList's SelectedIndexChanged event not firing
I have a DropDownList object in my web page. When I click on it and select a different value, nothing happens, even though I have a function wired up to the SelectedIndexChanged event.
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