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What is “callback hell” and how and why does RX solve it?
...of behavioural dependencies in your code like this, it can get troublesome fast. Especially if it branches...
a({
parameter : someParameter,
callback : function(status) {
if (status == states.SUCCESS) {
b(function(status) {
if (status == states.SUCCESS) {
...
javascript: recursive anonymous function?
...
It will not be fast. It's ugly to actually use (though conceptually beautiful!). You avoid having to give your function a tag or variable name (and I don't see why that would be a concern), but you still give it a name as the parameter to t...
What is RSS and VSZ in Linux memory management
...ocess-to-kill-first
Also interestingly, everything apparently happened so fast that before the freed memory was accounted, the oom was awoken again by the DeadlineMonitor process:
[ 7283.481043] DeadlineMonitor invoked oom-killer: gfp_mask=0x6200ca(GFP_HIGHUSER_MOVABLE), order=0, oom_score_adj=0
...
What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
...lors. PNGs use two-dimensional interlacing, which makes them load twice as fast as GIF images.”
3 Image that has a lot of colors or requires advanced variable transparency, PNG is the preferred file type.
GIF > Graphics Interchange Format
1 Reduces the number of colors in an image to 256.
2...
How can I add reflection to a C++ application?
... C++ is made with speed in mind, but the philosophy isn't "as fast as possible," instead it's, "you don't pay for it if you don't use it." I believe it's possible for a language to implement introspection in a way that fits with that philosophy, C++ just lacks it.
–...
How is Docker different from a virtual machine?
... image. Sure you can do this with other tools, but not nearly as easily or fast.
This is great for testing; let's say you have thousands of tests that need to connect to a database, and each test needs a pristine copy of the database and will make changes to the data. The classic approach to this i...
What do Clustered and Non clustered index actually mean?
...ex will increase the time it takes to write new records.
It is generally faster to read from a clustered index if you want to get back all the columns. You do not have to go first to the index and then to the table.
Writing to a table with a clustered index can be slower, if there is a need to re...
Performance of foreach, array_map with lambda and array_map with static function
... built-in function (strtolower), and in that case, useMapNamed is actually faster than useArray. Thought that was worth mentioning.
– DisgruntledGoat
Aug 30 '14 at 16:57
1
...
How to implement a rule engine?
...
This snippet compiles the Rules into fast executable code (using Expression trees) and does not need any complicated switch statements:
(Edit : full working example with generic method)
public Func<User, bool> CompileRule(Rule r)
{
var paramUser = Expr...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...truction in SQL Server 2005.
A typical stack trace is below
sqlservr.exe!FastDBCSToUnicode() + 0xac bytes
sqlservr.exe!nls_sqlhilo() + 0x35 bytes
sqlservr.exe!CXVariant::CmpCompareStr() + 0x2b bytes
sqlservr.exe!CXVariantPerformCompare<167,167>::Compare() + 0x18 bytes
sqlservr...