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How do I use shell variables in an awk script?
...nds to awk this way. Even make it crash with non valid commands.
Extra info:
Use of double quote
It's always good to double quote variable "$variable"
If not, multiple lines will be added as a long single line.
Example:
var="Line one
This is line two"
echo $var
Line one This is line two
ec...
Is there a unique Android device ID?
... emmby mentions in his answer, there are still problems even with the blog info. The question asks for a unique DEVICE identifier (not installation identifier), so I disagree with your statement. The blog is making an assumption that what you want is not necessarily to track the device, whereas the ...
Extending the User model with custom fields in Django
...ser) property.
Extending the existing User model
…
If you wish to store information related to User, you can use a one-to-one relationship to a model containing the fields for additional information. This one-to-one model is often called a profile model, as it might store non-auth related informa...
Is there any way to view the currently mapped keys in Vim?
...The above list is not complete. Typing :help map in Vim will give you more info.
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How to calculate md5 hash of a file using javascript
...
Thank for the info regarding MS Edge! I work for a company. And you know, that customers often use old software and how hard it is to convince them to update their software. I just wanted to point out, that one has to be careful using read...
What's the meaning of “=>” (an arrow formed from equals & greater than) in JavaScript?
...ess or manipulate this from one function inside another function. For more info on this topic, see the explanation and examples in the Mozilla documentation.
Example Code
Example (also from the docs):
var a = [
"We're up all night 'til the sun",
"We're up all night to get some",
"We're up all ...
How to use Servlets and Ajax?
... // we have the response
if(response.status == "SUCCESS"){
$('#info').html("Info has been added to the list successfully.<br>"+
"The Details are as follws : <br> Name : ");
}else{
$('#info').html("Sorry, there is some thing wrong with the data provided....
How can I get a precise time, for example in milliseconds in Objective-C?
...lude <mach/mach_time.h>
@implementation LBClock
{
mach_timebase_info_data_t _clock_timebase;
}
+ (instancetype)sharedClock
{
static LBClock *g;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
g = [LBClock new];
});
return g;
}
- (id)init
{
...
How can I select rows with most recent timestamp for each key value?
... BY sensorID, timestamp;
Pretty self-explaining I think, but here's more info if you wish, as well as other examples. It's from the MySQL manual, but above query works with every RDBMS (implementing the sql'92 standard).
s...
In log4j, does checking isDebugEnabled before logging improve performance?
...the approach taken by slf4j.
See my answer to a related question for more information, and an example of doing something like this with log4j.
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