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Difference between local and global indexes in DynamoDB
...h+range6.
You get 5 more range attributes to query on.
Also, there is only one provisioned throughput.
Global Secondary Indexes defines a new paradigm - different hash/range keys per index.
This breaks the original usage of one hash key per table.
This is also why when defining GSI you are required...
Switch on Enum in Java [duplicate]
... on an enum type, then instead of writing a switch, just call the method - one line of code: done!
enum MyEnum {
SOME_ENUM_CONSTANT {
@Override
public void method() {
System.out.println("first enum constant behavior!");
}
},
ANOTHER_ENUM_CONSTANT {
...
How to check if a column exists in a SQL Server table?
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In Martin Smith's version, one thing to mention is not to include columnName within square brackets [ ]. When columnName is inside square brackets [ ], it'll give null even if the column exists in the table
– Hemendra
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When is JavaScript synchronous?
...is incorrectly because it allows a more traditional programming model that one might be more used to. The reason it's problematic is that this option will block all JavaScript on the page until it finishes, including all event handlers and timers.
...
DateTime.Now vs. DateTime.UtcNow
...actly are the principles of how the two properties work. I know the second one is universal and basically doesn't deal with time zones, but can someone explain in detail how they work and which one should be used in what scenario?
...
Difference between require, include, require_once and include_once?
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@Prof.Falken Under what circumstances need one require same file more than once?? I can't think of one within my current mind set.
– Weishi Zeng
Oct 14 '14 at 4:53
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How can one display images side by side in a GitHub README.md?
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doesnt quite work for me. one of the (relative) images is a gif
– Ridhwaan Shakeel
Apr 20 '19 at 0:22
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How can I change the color of pagination dots of UIPageControl?
... can register a delegate object to get notifications when the user taps on one of the little page dots. If no delegate is registered then the view will not react to touch input.
It's completely fresh from the oven, but seems to work. Let me know if you run into any problems with it.
Future improve...
What does Docker add to lxc-tools (the userspace LXC tools)?
...cally namespaces and control groups) which allow sandboxing processes from one another, and controlling their resource allocations.
On top of this low-level foundation of kernel features, Docker offers a high-level tool with several powerful functionalities:
Portable deployment across machines. D...
Role-based access control (RBAC) vs. Claims-based access control (CBAC) in ASP.NET MVC
...o can do what. You can assign 'CanCreateCustomer' permission (claim) to anyone you like and only permitted user will be able to create customer and permitted user will be able to create only customer and nothing else (unless you assign other permissions to the same user).
This security model offer...