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When should I use the Visitor Design Pattern? [closed]
I keep seeing references to the visitor pattern in blogs but I've got to admit, I just don't get it. I read the wikipedia article for the pattern and I understand its mechanics but I'm still confused as to when I'd use it.
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How do I change the root directory of an apache server? [closed]
...ou type localhost in browser it will load */home/username/new_root_folder* content.
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Getting Chrome to accept self-signed localhost certificate
...e/policies/managed/EnableCommonNameFallbackForLocalAnchors.json with these contents: { "EnableCommonNameFallbackForLocalAnchors": true }
– seanf
May 10 '17 at 2:34
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Why does C++ compilation take so long?
...on unit.
(A macro may be defined in one compilation unit which changes the content of the header).
This is probably the main reason, as it requires huge amounts of code to be compiled for every compilation unit,
and additionally, every header has to be compiled multiple times
(once for every compil...
Is < faster than
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No, it will not be faster on most architectures. You didn't specify, but on x86, all of the integral comparisons will be typically implemented in two machine instructions:
A test or cmp instruction, which sets EFLAGS
And a Jcc (jump) instruction, depen...
Check if pull needed in Git
...tc.) This would have the advantage that you wouldn't have to pull down the content of all the commits right away, but could leave that for a more convenient time. However, since remote update is non-destructive, you might as well do it anyway.
– Neil Mayhew
Jul...
Is there a Java reflection utility to do a deep comparison of two objects?
...them logically. A LinkedHashMap can equal a TreeMap if they have the same contents and elements in the same order. For non-ordered Collections and Maps, only size and deep-equals items are required.
– John DeRegnaucourt
Oct 27 '19 at 2:12
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How to use the pass statement?
...or m>ex m>ceptions. What matters here is the type of m>ex m>ception, rather than the content.
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How can I access my localhost from my Android device?
I'm able to access my laptop web server using the Android emulator, I'm using 10.0.2.2:portno
works well.
39 Answers
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What's the Hi/Lo algorithm?
...value);
Providing you can commit this transaction (use retries to handle contention), you have allocated 200 keys &amp; can dispense them as needed.
With a chunk-size of just 20, this scheme is 10x faster than allocating from an Oracle sequence, and is 100% portable amongst all databases. Allocat...