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Subtract two variables in Bash
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You just need a little extra whitespace around the minus sign, and backticks:
COUNT=`expr $FIRSTV - $SECONDV`
Be aware of the exit status:
The exit status is 0 if EXPRESSION is neither null nor 0, 1 if EXPRESSION is null or 0.
Keep this in mind when using the expression in a bash sc...
How to send HTTP request in java? [duplicate]
In Java, How to compose a HTTP request message and send it to a HTTP WebServer?
9 Answers
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OSError: [Errno 2] No such file or directory while using python subprocess in Django
...tate "the use of shell=True is strongly discouraged in cases where the command string is constructed from external input", see link in the answer.
– valid
Nov 12 '14 at 4:01
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What is the { get; set; } syntax in C#?
I am learning ASP.NET MVC and I can read English documents, but I don't really understand what is happening in this code:
1...
Using Python 3 in virtualenv
...irtualenv --no-site-packages python3.4' worked. --distribute is deprecated and -p doesn't seem necessary since virtualenv uses python3.
– alkopop79
Nov 10 '17 at 13:04
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How to use BigInteger?
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@thecoshman - You are quite correct and the number of upvotes on your comment show this is wise advice for all readers of such questions. Some more wise advice is "read what others wrote before answering or commenting." For example in this case it doesn't even ...
How do you receive a url parameter with a spring controller mapping
... someAttr) {
}
You can even omit @RequestParam altogether if you choose, and Spring will assume that's what it is:
@RequestMapping("/{someID}")
public @ResponseBody int getAttr(@PathVariable(value="someID") String id,
String someAttr) {
}
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Does a view exist in ASP.NET MVC?
...eader , i hvnt tested but , IController controller = new HomeController(); and then controller.ControllerContext will give the thing which you can pass to findview methods.
– Vishal Sharma
Dec 6 '13 at 8:43
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Get unique values from a list in python [duplicate]
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mylist = ['nowplaying', 'PBS', 'PBS', 'nowplaying', 'job', 'debate', 'thenandnow']
myset = set(mylist)
print(myset)
If you use it further as a list, you should convert it back to a list by doing:
mynewlist = list(myset)
Another possibility, probably faster would be to use a set from the beginn...
How to convert JSON string to array
... invalid (for example, no quoted keys). That's what the documentation says and that's what my PHP 5.2 installation returns. Are you using a function other than the official, built-in json_decode()? What does var_dump(json_decode($str, true)); return?
– RickN
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