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Optimistic vs. Pessimistic locking
... tends to reduce concurrency, but is more predictable. You pay your money, etc ...
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How to get all child inputs of a div element (jQuery)
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var i = $("#panel input");
should work :-)
the > will only fetch direct children, no children's children
the : is for using pseudo-classes, eg. :hover, etc.
you can read about available css-selectors of pseudo-classes here: http://docs.jquery.com/DOM/Traversing/Selectors#CSS_Selector...
Run a JAR file from the command line and specify classpath
...t's for internal use (ie, you expect the user to have some technical skill etc.) you can just ask that step 1, before attempting to run the jar, is to run unzip MyJar.jar lib/*.jar. Then, as you suggest, they can run java -cp MyJar.jar:lib/* ...
– Roger
Oct 31 ...
Java GUI frameworks. What to choose? Swing, SWT, AWT, SwingX, JGoodies, JavaFX, Apache Pivot? [close
...classes aren't final, they just throw exceptions when the package of this.getClass() isn't org.eclipse.swt and you can't add new classes in that package because it's signed).
If you need a native, pure Java solution, that leaves you with the rest. Let's start with AWT, Swing, SwingX - the Swing way....
Priority queue in .Net [closed]
... i.e. the Peek operation. And here it involves enumerator setup, for-loop, etc. Why!? Also, the "Enqueue" operation rather than being O(logN) - another key feature of the heap, has one O(longN) swipe because of "ContainsKey", a second one (again O(longN)) to add the Queue entry (if needed), a third ...
What is the effect of encoding an image in base64?
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Takeaway = There's some advantage to encoding and gzipping your UI icons, etc, but unwise to do this for larger images.
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mongodb group values by multiple fields
...lf-join" with another pipeline expression, in which we can apply $limit in order to return the "top-n" results.
db.books.aggregate([
{ "$group": {
"_id": "$addr",
"count": { "$sum": 1 }
}},
{ "$sort": { "count": -1 } },
{ "$limit": 2 },
{ "$lookup": {
"from": "books",
"let"...
How to process POST data in Node.js?
... <input type="submit" value="Submit">
</form>
API client:
fetch('/', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
user: {
name: "John",
email: "john@example.com"
}
})
});
...
Add custom icons to font awesome
...you can then convert to all the relevant font formats (svg, truetype, woff etc).
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Inserting a Link to a Webpage in an IPython Notebook
...he Notebook. This image should be in a standard image format (.png, .jpg, etc ). Paste this image into the same folder on the computer where the Jupyter notebook file is located. Note: if the image is later deemed too large or small, then resize using any graphics software available - and then sav...