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if, elif, else statement issues in Bash
...if[). Only after having parsed the statement it would be executed (and an error message like elif[: command not found would be output).
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How to install Maven 3 on Ubuntu 18.04/17.04/16.10/16.04 LTS/15.10/15.04/14.10/14.04 LTS/13.10/13.04
...ollowing:
set it up from scratch
repair it if apt-get update gives a 404 error after add-apt-repository
repair it if apt-get update gives a NO_PUBKEY error after manually adding it to /etc/apt/sources.list
Open a terminal and run the following:
sudo -i
Enter your password if necessary, then p...
Disable browser's back button
... browser, but you can make it so that your application breaks (displays an error message, requiring the user to start over) if the user goes back.
One approach I have seen for doing this is to pass a token on every URL within the application, and within every form. The token is regenerated on ever...
SQL how to increase or decrease one for a int column in one command
...at is, you try to do the creation first. If it's already there, ignore the error. Otherwise you create it with a 0 value.
Then do the update which will work correctly whether or not:
the row originally existed.
someone updated it between your insert and update.
It's not a single instruction and...
How do I convert a git repository to mercurial?
...ify that hg will need access to git for the conversion or else you get the error "cannot find required "git" tool".
– jmd
Jun 22 '16 at 8:58
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也来说说ReactOS的调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...if (!Rs232ConfigurePortWin32(String))
{
MessageBox(hMainWnd, TEXT("Error configuring port!"), TEXT("Error"), MB_OK|MB_ICONSTOP);
bConnected = FALSE;
return;
}
接着看看这个函数Rs232ConfigurePortWin32(同目录下的rs232.c中):
代码:
BOOL Rs232ConfigurePortWi...
List OrderBy Alphabetical Order
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This answer demonstates most common error when using LINQ - methods like OrderBy do not modify list, but rather return new "collection" (usually lazy IEnumerable<T>) that need to be assigned to something.
– Alexei Levenkov
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'python' is not recognized as an internal or external command [duplicate]
...t the problem is, when I go to cmd and type python testloop.py I get the error:
15 Answers
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Create new tmux session from inside a tmux session
...use we're creating a new detached session. Otherwise you'll get a nesting error.
$ tmux new -s development -d
$ tmux new -s foo -d
$ tmux ls
> development: 1 windows (created Wed Jan 13 11:31:38 2016) [204x54]
> foo: 1 windows (created Wed Jan 13 11:31:38 2016) [204x54]
$ tmux attach -t
$ tm...
What is __gxx_personality_v0 for?
.... I added CPPFLAGS += -fno-exceptions to my makefile, and that solved the error.
– Alan Kinnaman
Jun 14 '16 at 22:56
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