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Is C++ context-free or context-sensitive?
I often hear claims that C++ is a context-sensitive language. Take the following example:
20 Answers
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Why were pandas merges in python faster than data.table merges in R in 2012?
...eal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (the algorithm), but a preliminary step.
Recent efforts have gone into allowing character columns in keys, which should resolve that issue by integrating more closely with R's own...
Best practices for API versioning? [closed]
...he users of that API.
Since evolution of an application and, to a lesser extent, its API is a fact of life and that it's even similar to the evolution of a seemingly complex product like a programming language, the URI design should have less natural constraints and it should be preserved over time...
Why is processing a sorted array faster than processing an unsorted array?
...some strange reason, sorting the data miraculously makes the code almost six times faster:
26 Answers
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Can someone explain the “debounce” function in Javascript
...a new anonymous function
return function() {
// reference the context and args for the setTimeout function
var context = this,
args = arguments;
// Should the function be called now? If immediate is true
// and not already in a timeout then the answer is: Yes
v...
How can I find the data structure that represents mine layout of Minesweeper in memory?
... a simple WinDbg command that reveals all the mines but it is old, is not explained in any detail and really isn't what I'm looking for.
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How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
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The ISO C99 standard specifies that these macros must only be defined if explicitly requested.
#define __STDC_FORMAT_MACROS
#include <inttypes.h>
... now PRIu64 will work
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select count(*) from table of mysql in php
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After 5.x version this query will not work just replace mysql with mysqli to make it work.
– ajay verma
Apr 2 '18 at 16:09
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How do I count unique values inside a list
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Not an answer to Joel's question, but exactly what I was looking for, thanks!
– Huw Walters
Sep 5 '15 at 7:29
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Where are the PostgreSQL logs on macOS?
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On OS X, if you're using the EnterpriseDB installation of PostgreSQL, your log files will be in /Library/PostgreSQL/8.4/data/pg_log
Of course, you'll want to substitute 8.4 for whichever version number you're running.
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