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“var” or no “var” in JavaScript's “for-in” loop?
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The first version:
for (var x in set) {
...
}
declares a local variable called x. The second version:
for (x in set) {
...
}
does not.
If x is already a local variable (i.e. you have a var x; or var x = ...; somewhere earlier in your current sc...
Is it possible to change only the alpha of a rgba background colour on hover?
I have a set of <a> tags with differing rgba background colours but the same alpha. Is it possible to write a single css style that will change only the opacity of the rgba attribute?
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IntelliJ IDEA generating serialVersionUID
... if you have an old version of IntelliJ IDEA, but if I go to menu File → Settings... → Inspections → Serialization issues → Serializable class without 'serialVersionUID'` enabled, the class you provide give me warnings.
If I try the first class I see:
BTW: It didn't show me a warning u...
Java 7 language features with Android
... CE and other javac-based IDEs supports compiling to Android and you could set the compliance even up to Java 8 with:
File → Project Structure → Modules → (pick the module at the 2nd pane) → Language level → (choose "7.0 - Diamonds, ARM, multi-catch, etc.")
This only allows Java 7 la...
JPA: unidirectional many-to-one and cascading delete
...te any orphaned children when the child entity in the parent collection is set to null, i.e. remove the child when it is not present in any parent's collection.
Or, specify the foreign key constraint in the child table as ON DELETE CASCADE. You'll need to invoke EntityManager.clear() after calling E...
How can I make a div not larger than its contents?
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The solution is to set your div to display: inline-block.
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Authorative way to override onMeasure()?
...nt uses MeasureSpec to calculate the dimensions, then ends with a call to setMeasuredDimension(). For example:
8 Answers
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Best way to center a on a page vertically and horizontally? [duplicate]
...rmal flow of elements going from top to bottom, so the margin-top: auto is set to zero. However, an absolutely positioned element acts the same for distribution of free space, and similarly can be centered vertically at the specified top and bottom (does not work in IE7).
This trick will work with ...
Prompt Dialog in Windows Forms
...osoft.VisualBasic.Compatibility namespace. Microsoft.VisualBasic is more a set of helper libraries on top of .Net and isn't really VB specific at all.
– Jim Wooley
Sep 26 '19 at 14:51
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In Python, when should I use a function instead of a method?
...In a less permissive language like Java however, remember that getFoo() ad setFoo() functions are the norm, so immutability is not absolute. Client code is just not allowed to make assignments to members.
– arrdem
Nov 13 '11 at 2:26
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