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Why use the INCLUDE clause when creating an index?
...erts/deletes require the index to be updated/sorted anyway and thus little extra overhead is associated with storing off a few extra columns while already updating the index. The overhead is the extra memory and CPU used to store redundant info on the index.
If the columns you consider to add as in...
SparseArray vs HashMap
...his is a supplemental answer for that.
Create a SparseArray
SparseArray<String> sparseArray = new SparseArray<>();
A SparseArray maps integers to some Object, so you could replace String in the example above with any other Object. If you are mapping integers to integers then use SparseI...
What is a “callback” in C and how are they implemented?
...dlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <string.h>
#include "../../common_typedef.h"
typedef void (*call_back) (S32, S32);
void test_call_back(S32 a, S32 b)
{
printf("In call back function, a:%d \t b:%d \n", a, b);
}
void call_callback_func(call_back back)...
Using Razor within JavaScript
... var description = '@(Model.Description)';
var contentString = '<h3>' + title + '</h3>' + '<p>' + description + '</p>'
var infowindow = new google.maps.InfoWindow({
content: contentString
});
var marke...
Fastest way(s) to move the cursor on a terminal command line?
... command, but replace option25. To modify the last ./cmd command, use the !string syntax: !./cmd:s/--option25/--newoption/
Any delimiter may be used in place of / in the substitution.
If editing the previous line, you can use quick substitution: ^--option25^--newoption
Character search. This was men...
How do you execute an arbitrary native command from a string?
...ress my need with the following scenario: Write a function that accepts a string to be run as a native command.
4 Answer...
Why use strict and warnings?
...erl to code properly which could be forcing declaration, being explicit on strings and subs i.e. barewords or using refs with caution. Note: if there are errors use strict will abort the execution if used.
While use warnings; will help you find typing mistakes in program like you missed a semicolon...
Foreach loop, determine which is the last iteration of the loop
...es in your collection. For example, if you're working with a collection of strings, and there are any duplicates, then that "different with the last item" code will execute for every occurrence of the last item in the list.
– muttley91
Sep 27 '13 at 18:22
...
Getting Http Status code number (200, 301, 404, etc.) from HttpWebRequest and HttpWebResponse
...nsole.WriteLine("Response Code: " + (int)statusCode + " - " + statusCode.ToString());
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iPhone get SSID without private library
...s: %@", __func__, interfaceNames);
NSDictionary *SSIDInfo;
for (NSString *interfaceName in interfaceNames) {
SSIDInfo = CFBridgingRelease(
CNCopyCurrentNetworkInfo((__bridge CFStringRef)interfaceName));
NSLog(@"%s: %@ => %@", __func__, interfaceName, SSIDInfo)...