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Redis: possible to expire an element in an array or sorted set?
...tire key/value pair? What if I want to add values to a List type structure and have them get auto removed 1 hour after insertion. Is that currently possible, or would it require running a cron job to do the purging manually?
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How to import an excel file in to a MySQL database
...SCAPED BY '\'
Check your data. Sometimes quoting or escaping has problems, and you need to adjust your source, import command-- or it may just be easier to post-process via SQL.
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How to design a multi-user ajax web application to be concurrently safe
...ges to objects while at the same time being able to deliver updates timely and efficiently, detecting and resolving conflicts like the one above.
If I was in your shoes I would develop something like this:
1. Server-Side:
Determine a reasonable level at which you would define what I'd call "atom...
Should I use a class or dictionary?
I have a class that contains only fields and no methods, like this:
9 Answers
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What is the difference between .text, .value, and .value2?
What is the difference between .text , .value , and .value2 ? Such as when should target.text, target.value, and target.value2 be used?
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Spring Data: “delete by” is supported?
...ing JPA for database access. I am able to find examples such as findByName and countByName, for which I dont have to write any method implementation. I am hoping to find examples for delete a group of records based on some condition.
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NPM/Bower/Composer - differences?
Can someone explain to me the difference between NPM , Bower and Composer .
1 Answer
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What is the garbage collector in Java?
I am new to Java and confused about the garbage collector in Java. What does it actually do and when does it comes into action. Please describe some of the properties of the garbage collector in Java.
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What would cause an algorithm to have O(log log n) complexity?
... 16
16 / 2 = 8
8 / 2 = 4
4 / 2 = 2
2 / 2 = 1
This process takes 16 steps, and it's also the case that 65,536 = 216.
But, if we take the square root at each level, we get
√65,536 = 256
√256 = 16
√16 = 4
√4 = 2
Notice that it only takes four steps to get all the way down to 2. Why is this?...
An algorithm for inflating/deflating (offsetting, buffering) polygons
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I thought I might briefly mention my own polygon clipping and offsetting library - Clipper.
While Clipper is primarily designed for polygon clipping operations, it does polygon offsetting too. The library is open source freeware written in Delphi, C++ and C#. It has a very unencumb...