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Downloading a picture via urllib and python
...n, the extension of the file would be appended. It made sense to me at the time, but I think now I understand what's happening.
– JeffThompson
Nov 3 '14 at 11:41
68
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How to 'minify' Javascript code
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When you write a function you have an idea, start to write stuff and sometimes you end up with something like the following code.The code works.Now most people stop thinking and add this to a minifier and publish it.
function myFunction(myNumber){
var myArray = new Array(myNumber);
var ...
Relative paths based on file location instead of current working directory [duplicate]
... make your shell script work independent of where you invoke it from. Each time you run it, it will be as if you were running ./cat.sh inside dir.
Note that this script only works if you're invoking the script directly (i.e. not via a symlink), otherwise the finding the current location of the scri...
What's the point of const pointers?
...d use in pursuit of a very important C++ concept:
Find bugs at compile-time, rather than run-time, by getting the compiler to enforce what you mean.
Even though it doesn't change the functionality, adding const generates a compiler error when you're doing things you didn't mean to do. Imagine ...
Test for existence of nested JavaScript object key
...ar if you want to prevent the overhead of creating a new empty object each time. In 99% of cases I would not expect speed to matter, and in cases where it does there is no substitute for profiling.
– Gabe Moothart
Sep 5 '13 at 18:13
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How to force a web browser NOT to cache images
...ure.jpg?1222259157.415" alt="">
Where "1222259157.415" is the current time on the server.
Generate time by Javascript with performance.now() or by Python with time.time()
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Ways to save enums in database
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@LuisGouveia I agree with you that the time could double. Causing a query that takes 12.37 ms to instead take 12.3702 ms. That's what i mean by "in the noise". You run the query again and it takes 13.29 ms, or 11.36 ms. In other words, the randomness of the thread...
How does one write code that best utilizes the CPU cache to improve performance?
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The cache is there to reduce the number of times the CPU would stall waiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwi...
What is “rvalue reference for *this”?
...ugh, does an rvalue reference to the member of a temporary prolong the lifetime of that temporary, or the member thereof? I could swear I saw a question about that on SO some time ago...
– Xeo
Dec 22 '11 at 23:22
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Sorted collection in Java
...ng Collections.sort(...) is that this will maintain a partial order at all times, with O(log(n)) insertion performance, by using a heap data structure, whereas inserting in a sorted ArrayList will be O(n) (i.e., using binary search and move).
However, unlike a List, PriorityQueue does not support i...