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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
I'm new to Go and I'm experiencing a bit of congitive dissonance between C-style stack-based programming where automatic variables live on the stack and allocated memory lives on the heap and and Python-style stack-based-programming where the only thing that lives on the stack are references/pointer...
Apache Spark: map vs mapPartitions?
What's the difference between an RDD's map and mapPartitions method? And does flatMap behave like map or like mapPartitions ? Thanks.
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jquery variable syntax [duplicate]
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$self has little to do with $, which is an alias for jQuery in this case. Some people prefer to put a dollar sign together with the variable to make a distinction between regular vars and jQuery objects.
example:
var self = 'some stri...
Xcode 'Build and Archive' menu item disabled
...ing the new 'Build and Archive' feature of the latest Xcode 3.2.3. I like it.
10 Answers
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How to use setInterval and clearInterval?
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setInterval sets up a recurring timer. It returns a handle that you can pass into clearInterval to stop it from firing:
var handle = setInterval(drawAll, 20);
// When you want to cancel it:
clearInterval(handle);
handle = 0; // I just do this so I know I've clea...
Sorting a set of values [closed]
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I want to sort each set.
That's easy. For any set s (or anything else iterable), sorted(s) returns a list of the elements of s in sorted order:
>>> s = set(['0.000000000', '0.009518000', '10.277200999', '0.030810999', '0.018384000', '4.918560000'])
>>> sorted(s)
['0.000000000...
What is the “N+1 selects problem” in ORM (Object-Relational Mapping)?
...blem in Object-Relational mapping (ORM) discussions, and I understand that it has something to do with having to make a lot of database queries for something that seems simple in the object world.
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How to select label for=“XYZ” in CSS?
...r would be label[for=email], so in CSS:
label[for=email]
{
/* ...definitions here... */
}
...or in JavaScript using the DOM:
var element = document.querySelector("label[for=email]");
...or in JavaScript using jQuery:
var element = $("label[for=email]");
It's an attribute selector. Note ...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...lass servlet.java in my default package in src folder. In my web.xml it is mapped as /servlet .
12 Answers
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What does `unsigned` in MySQL mean and when to use it?
What does "unsigned" mean in MySQL and when should I use it?
1 Answer
1
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