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Can I change the root EBS device of my amazon EC2 instance?
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Thanks, this is great. One gotcha is that the DNS/IP can change when this happens, so make sure to update any DNS / Elastic IPs, et cetera. I spent a while trying to figure out why I couldn't ssh into it anymore, and this was the reason.
– mrooney
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Is a Java string really immutable?
We all know that String is immutable in Java, but check the following code:
15 Answers
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How to avoid null checking in Java?
...dition> is a boolean expression and <object> is an object whose toString() method's output will be included in the error.
An assert statement throws an Error (AssertionError) if the condition is not true. By default, Java ignores assertions. You can enable assertions by passing the optio...
static const vs #define
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String constants specifically are one of those that might benefit from being #defined, at least if they can be used as "building blocks" for bigger string constants. See my reply for an example.
– AnT
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Default filter in Django admin
... 'selected': self.value() == lookup,
'query_string': cl.get_query_string({
self.parameter_name: lookup,
}, []),
'display': title,
}
def queryset(self, request, queryset):
if self.value() in ('...
Windows batch: sleep [duplicate]
How do I get a Windows batch script to wait a few seconds?
12 Answers
12
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How do I find out my MySQL URL, host, port and username?
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How can I get ip address ? I mean for above example there is 'DELL' hostname and can I get ip address instead of name ?
– Ozan
Jan 25 '16 at 7:59
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Scanner vs. BufferedReader
...tokens (parts). It's able to give back you specific parts directly as int, string, decimal, etc. See also all those nextXxx() methods in Scanner class.
Reading = dumb streaming. It keeps giving back you all characters, which you in turn have to manually inspect if you'd like to match or compose som...
The required anti-forgery form field “__RequestVerificationToken” is not present Error in user Regis
I am using Membership.create user function, then the following error is occurring,
19 Answers
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How to get first and last day of previous month (with timestamp) in SQL Server
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First Day Of Current Week.
select CONVERT(varchar,dateadd(week,datediff(week,0,getdate()),0),106)
Last Day Of Current Week.
select CONVERT(varchar,dateadd(week,datediff(week,0,getdate()),6),106)
First Day Of Last week.
select CONVERT(varchar,DATEADD(week,datediff(...