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Why do we check up to the square root of a prime number to determine if it is prime?
To test whether a number is prime or not, why do we have to test whether it is divisible only up to the square root of that number?
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“java.lang.OutOfMemoryError : unable to create new native Thread”
We are getting "java.lang.OutOfMemoryError : unable to create new native Thread " on 8GB RAM VM after 32k threads (ps -eLF| grep -c java)
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@class vs. #import
It is to my understanding that one should use a forward-class declaration in the event ClassA needs to include a ClassB header, and ClassB needs to include a ClassA header to avoid any circular inclusions. I also understand that an #import is a simple ifndef so that an include only happens once....
Concatenate strings in Less
... thought I ask in case there is a way. The idea is that I have a variable for path to web resource folder:
6 Answers
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About “*.d.ts” in TypeScript
...y someone that this kind of file is something like "head file" in C++ but for JS only. But I cannot convert a pure JS file to *.d.ts file unless I forcely change the *.js to *.ts . So I have three files:
a JS file, a TS file and a *.d.ts file.
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bootstrap popover not showing on top of all elements
I'm working on a bootstrap site and after updating to bootstrap 2.2 from 2.0 everything worked except the popover.
15 Answe...
What is the difference between procedural programming and functional programming? [closed]
I've read the Wikipedia articles for both procedural programming and functional programming , but I'm still slightly confused. Could someone boil it down to the core?
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Prevent ViewPager from destroying off-screen views
...nts. The ViewPager appears to destroy a hosted fragment's view when it is more than one swipe away from the current position.
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Postgresql: Conditionally unique constraint
I'd like to add a constraint which enforces uniqueness on a column only in a portion of a table.
2 Answers
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Creating JS object with Object.create(null)?
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They are not equivalent. {}.constructor.prototype == Object.prototype while Object.create(null) doesn't inherit from anything and thus has no properties at all.
In other words: A javascript object inherits from Object by default, unless you explicitly create it...