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Detect the Internet connection is offline?
...e that the connection is lost by making failed XHR requests.
The standard approach is to retry the request a few times. If it doesn't go through, alert the user to check the connection, and fail gracefully.
Sidenote: To put the entire application in an "offline" state may lead to a lot of error-p...
Types in MySQL: BigInt(20) vs Int(20)
...264 (22003): Out of range value for column 'id' at row 1
mysql> SET sql_mode = '';
Query OK, 0 rows affected, 1 warning (0,00 sec)
mysql> INSERT INTO `test` (`id`) VALUES (401421228216);
Query OK, 1 row affected, 1 warning (0,06 sec)
mysql> SELECT * FROM `test`;
+------------+
| id ...
How can I force Powershell to return an array when a call only returns one object?
...mands in parentheses with an @ at the beginning:
$serverIps = @(gwmi Win32_NetworkAdapterConfiguration
| Where { $_.IPAddress }
| Select -Expand IPAddress
| Where { $_ -like '*.*.*.*' }
| Sort)
Specify the data type of the variable as an array:
[array]$serverIps = gwmi Win32_...
How to “EXPIRE” the “HSET” child key in redis?
... mentioning:
When having a hash, the structure basically looks like:
hash_top_key
- child_key_1 -> some_value
- child_key_2 -> some_value
...
- child_key_n -> some_value
Since we want to add TTL to the child keys, we can move them to top keys. The main point is that the key now ...
Redirecting stdout to “nothing” in python
...eference to the original sys.stdout and set it back after. For example old_stdout = sys.stdout before any of the other code, then sys.stdout = old_stdout when you are done.
– Andrew Clark
Aug 20 '14 at 21:05
...
How to compile a static library in Linux?
...0);
fun2(10);
return 0;
}
lib.h the libs main header
#ifndef LIB_H_INCLUDED
#define LIB_H_INCLUDED
#include "lib1.h"
#include "lib2.h"
#endif
lib1.c first lib source
#include "lib1.h"
#include <stdio.h>
void fun1 ( int x )
{
printf("%i\n",x);
}
lib1.h the corresponding ...
std::wstring VS std::string
...ndows?
On Windows, this is a bit different. Win32 had to support a lot of application working with char and on different charsets/codepages produced in all the world, before the advent of Unicode.
So their solution was an interesting one: If an application works with char, then the char strings ar...
Styling Google Maps InfoWindow
...unction InfoBox(opts) {
google.maps.OverlayView.call(this);
this.latlng_ = opts.latlng;
this.map_ = opts.map;
this.offsetVertical_ = -195;
this.offsetHorizontal_ = 0;
this.height_ = 165;
this.width_ = 266;
var me = this;
this.boundsChangedListener_ =
google.maps.event.addListe...
Regular expression to find URLs within a string
...
This is the one I use
(http|ftp|https)://([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:/~+#-]*[\w@?^=%&/~+#-])?
Works for me, should work for you too.
share
|
impro...
How can I swap positions of two open files (in splits) in vim?
...
Starting with this:
____________________
| one | two |
| | |
| |______|
| | three|
| | |
|___________|______|
Make 'three' the active window, then issue the command ctrl+w J. This moves ...