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Cannot create an array of LinkedLists in Java…?
I'm working on a sparse matrix class that needs to use an array of LinkedList to store the values of a matrix. Each element of the array (i.e. each LinkedList ) represents a row of the matrix. And, each element in the LinkedList array represents a column and the stored value.
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How do I create a comma-separated list from an array in PHP?
I know how to loop through items of an array using foreach and append a comma, but it's always a pain having to take off the final comma. Is there an easy PHP way of doing it?
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Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
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However, I've always heard what Ash mentioned in his answer (that using Array.join is faster for concatenation) so I wanted to test out the different methods of concatenating strings and abstracting the fastest way into a StringBuilder. I wrote some tests to see if this is true (it isn't!).
This...
Comparing arrays in JUnit assertions, concise built-in way?
Is there a concise, built-in way to do equals assertions on two like-typed arrays in JUnit? By default (at least in JUnit 4) it seems to do an instance compare on the array object itself.
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Fastest way to check if a string is JSON in PHP?
...le are not aware that JSON allows values to be more than just an object or array. Valid JSON values may be objects, arrays, numbers, strings, booleans, and null.
– zzzzBov
May 8 '15 at 1:30
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Maximum size of an Array in Javascript
...ads an rss feed, and updates/checks the feed in the background. I have one array to store data to display, and another which stores ID's of records that have been shown.
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How can you sort an array without mutating the original array?
...uppose I wanted a sort function that returns a sorted copy of the inputted array. I naively tried this
6 Answers
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Performance of FOR vs FOREACH in PHP
...se what makes sense in the context. Personally I almost never use for for array traversal. I use it for other types of iteration, but foreach is just too easy... The time difference is going to be minimal in most cases.
The big thing to watch for is:
for ($i = 0; $i < count($array); $i++) {
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How to get String Array from arrays.xml file
I am just trying to display a list from an array that I have in my arrays.xml . When I try to run it in the emulator, I get a force close message.
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Angular JS break ForEach
...ve tested on IE11 and it is also as fast as in the screenshot. Also tested Array.some() but it is slower then Array.forEach() on IE11 but could be faster then angular.foreach ;-). Or test it here jsperf.com/angular-foreach-vs-native (all credits go to the original author, not me ;-))
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