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How are everyday machines programmed?
...h computers and mobile devices as appliances, digital watches, etc) programmed? What kind of code goes into the programming of a Coca-Cola vending machine? How does my coffee maker accept a pre-programmed time and begin brewing a pot of coffee hours later, when that time arrives?
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How to escape a JSON string to have it in a URL?
Using Javascript, I want to generate a link to a page. The parameters to the page are in a Javascript array that I serialize in JSON.
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Android: how to make keyboard enter button say “Search” and handle its click?
I can't figure this out. Some apps have a EditText (textbox) which, when you touch it and it brings up the on-screen keyboard, the keyboard has a "Search" button instead of an enter key.
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Accessing bash command line args $@ vs $*
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The difference appears when the special parameters are quoted. Let me illustrate the differences:
$ set -- "arg 1" "arg 2" "arg 3"
$ for word in $*; do echo "$word"; done
arg
1
arg
2
arg
3
$ for word in $@; do echo "$word"; done
arg
1
arg
2
arg
3
$ for word in "...
SSH to Elastic Beanstalk instance
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I found it to be a 2-step process. This assumes that you've already set up a keypair to access EC2 instances in the relevant region.
Configure Security Group
In the AWS console, open the EC2 tab.
Select the relevant region and click on Security Group.
You should hav...
How do browser cookie domains work?
...nction between the Domain attribute value and the effective domain: the former is taken from the Set-Cookie header field and the latter is the interpretation of that attribute value. According to the RFC 2965, the following should apply:
If the Set-Cookie header field does not have a Domain attrib...
Assign multiple columns using := in data.table, by group
...hello
# 4: 1 4 hi hello
# 5: 2 5 hi hello
# 6: 3 6 hi hello
x[ , c("mean", "sum") := list(mean(b), sum(b)), by = a][]
# a b col1 col2 mean sum
# 1: 1 1 hi hello 2.5 5
# 2: 2 2 hi hello 3.5 7
# 3: 3 3 hi hello 4.5 9
# 4: 1 4 hi hello 2.5 5
# 5: 2 5 hi hello 3.5 7
#...
How to reset postgres' primary key sequence when it falls out of sync?
... answered Oct 28 '08 at 18:14
meleyalmeleyal
27.1k2222 gold badges6767 silver badges7676 bronze badges
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Why have header files and .cpp files? [closed]
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Well, the main reason would be for separating the interface from the implementation. The header declares "what" a class (or whatever is being implemented) will do, while the cpp file defines "how" it will perform those features.
This reduces dependencies so that code that uses the header doesn't ...
Why do you program in assembly? [closed]
...tters (it's Haack if you really care) because it seems to be a common statement.
30 Answers
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