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Managing CSS Explosion
...et Formatting
On all 4 my answer has included the advice to download and read Natalie Downe's PDF CSS Systems. (The PDF includes tons of notes not in the slides, so read the PDF!). Take note of her suggestions for organization.
EDIT (2014/02/05) four years later, I'd say:
Use a CSS pre-processo...
Is it alright to use target=“_blank” in HTML5?
I recall reading somewhere that in HTML5 it was no longer okay to use target="_blank" in HTML5, but I can't find it now.
...
虚拟机安装CentOS出错：EDD:Error 8000 reading sector 2106934 - 更多技术...
虚拟机安装CentOS出错：EDD:Error 8000 reading sector 2106934现象：EDD:Error 8000 reading sector 2106934No DEFAULT or UI configuration directive found!boot:Getting closer!When i ...现象：
EDD:Error 8000 reading sector 2106934
No DEFAULT or UI configuration directive found!
boot:
...
Code Golf: Lasers
...ng the way -- fortunately "6" is not a valid input char.
$_ = <>;
Read the board into $_.
$s="#";
$s is the symbol of whatever the beam is sitting on top of now. Since the laser emitter is to be treated like a wall, set this to be a wall to begin with.
if (tr/v<^/>v</) {
my $...
Checking for NULL pointer in C/C++ [closed]
..." or "if (ptr != nullptr)" as it is more concise so it makes the code more readable. But I just found out that comparison raises (resp.) warning/error for comparison with NULL/nullptr on recent compilers. So if you want to check a pointer, better to do "if (ptr != NULL)" instead of "if (ptr)". If yo...
Why is the String class declared final in Java?
...s very useful to have strings implemented as immutable objects. You should read about immutability to understand more about it.
One advantage of immutable objects is that
You can share duplicates by pointing them to a single instance.
(from here).
If String were not final, you could create a...
Why is quicksort better than mergesort?
...esign. However, other things – such as locality of reference (i.e. do we read lots of elements which are probably in cache?) – also play an important role on current hardware. Quicksort in particular requires little additional space and exhibits good cache locality, and this makes it faster than...
Select n random rows from SQL Server table
...IME ON
SET STATISTICS IO ON
/* newid()
rows returned: 10000
logical reads: 3359
CPU time: 3312 ms
elapsed time = 3359 ms
*/
SELECT TOP 1 PERCENT Number
FROM Numbers
ORDER BY newid()
/* TABLESAMPLE
rows returned: 9269 (varies)
logical reads: 32
CPU time: 0 ms
elapsed time: 5...
How can I replace every occurrence of a String in a file with PowerShell?
...-Content file.txt) is required:
Without the parenthesis the content is read, one line at a time, and flows down the pipeline until it reaches out-file or set-content, which tries to write to the same file, but it's already open by get-content and you get an error. The parenthesis causes the oper...
Efficiency of purely functional programming
... needs to implement algorithms on purely-functional data structures should read Okasaki. You can always get at worst an O(log n) slowdown per operation by simulating mutable memory with a balanced binary tree, but in many cases you can do considerably better than that, and Okasaki describes many use...