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How does facebook, gmail send the real time notification?
I have read some posts about this topic and the answers are comet, reverse ajax, http streaming, server push, etc.
5 Answer...
How does the MapReduce sort algorithm work?
... power of MapReduce is the Terasort benchmark . I'm having trouble understanding the basics of the sorting algorithm used in the MapReduce environment.
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user authentication libraries for node.js?
...an do password authentication for a user (using a custom backend auth DB), and associate that user with a session.
15 Answe...
How to hide keyboard in swift on pressing return key?
...s making your keyboard not to show. If you want, put your code on pastebin and paste the link here for me to see it.
– rsc
Oct 22 '15 at 17:29
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Run a task every x-minutes with Windows Task Scheduler [closed]
...o in Advanced... (or similar depending on the operating system you are on) and select the Repeat every X minutes option for 24 hours.
The key here is to find the advanced properties. If you are using the XP wizard, it will only offer you to launch the advanced dialog once you created the task.
On ...
Converting an array of objects to ActiveRecord::Relation
... ActiveRecord::Relation since a Relation is just a builder for a SQL query and its methods do not operate on actual data.
However, if what you want is a relation then:
for ActiveRecord 3.x, don’t call all and instead call scoped, which will give back a Relation which represents the same records...
Why are function pointers and data pointers incompatible in C/C++?
I have read that converting a function pointer to a data pointer and vice versa works on most platforms but is not guaranteed to work. Why is this the case? Shouldn't both be simply addresses into main memory and therefore be compatible?
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What's the best way to parse command line arguments? [closed]
What's the easiest , tersest , and most flexible method or library for parsing Python command line arguments?
15 Answer...
Is inline assembly language slower than native C++ code?
I tried to compare the performance of inline assembly language and C++ code, so I wrote a function that add two arrays of size 2000 for 100000 times. Here's the code:
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In where shall I use isset() and !empty()
...TRUE , therefore isset() is not an effective way to validate text inputs and text boxes from a HTML form.
17 Answers
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