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Postgresql: password authentication failed for user “postgres”
... FATAL: password authentication failed for user "postgres" then check the file /etc/postgresql/8.4/main/pg_hba.conf: There must be a line like this as the first non-comment line:
local all postgres ident
For newer versions of PostgreSQL ident actually might be ...
What are differences between AssemblyVersion, AssemblyFileVersion and AssemblyInformationalVersion?
...ns you only update when the major changes, so 1.0, 2.0, 3.0, etc.
AssemblyFileVersion
Used for deployment. You can increase this number for every deployment. It is used by setup programs. Use it to mark assemblies that have the same AssemblyVersion, but are generated from different builds.
In Win...
What's up with Java's “%n” in printf?
...m you are running on
C handles this differently. You can choose to open a file in either "text" or "binary" mode. If you open the file in binary mode \n will give you a "unix style" line ending and "\r\n" will give you a "dos style" line ending. If you open the file in "text" mode on a dos/windows ...
How to show math equations in general github's markdown(not github's blog)
...ve found mathjax can do this. But when I write some example in my markdown file, it doesn't show the correct equations:
10 ...
Scanner vs. BufferedReader
...I know, the two most common methods of reading character-based data from a file in Java is using Scanner or BufferedReader . I also know that the BufferedReader reads files efficiently by using a buffer to avoid physical disk operations.
...
MSSQL Error 'The underlying provider failed on Open'
...Now I want to change the connection string so that there will be no .mdf file.
40 Answers
...
How do I execute a command and get the output of the command within C++ using POSIX?
...ay<char, 128> buffer;
std::string result;
std::unique_ptr<FILE, decltype(&pclose)> pipe(popen(cmd, "r"), pclose);
if (!pipe) {
throw std::runtime_error("popen() failed!");
}
while (fgets(buffer.data(), buffer.size(), pipe.get()) != nullptr) {
resul...
Create an empty data.frame
... vectors:
df <- data.frame(Date=as.Date(character()),
File=character(),
User=character(),
stringsAsFactors=FALSE)
Here's an other example with different column types :
df <- data.frame(Doubles=double(),
Ints=integer()...
Amazon EC2, mysql aborting start because InnoDB: mmap (x bytes) failed; errno 12
...ve AWS Account with a Micro instance running.
Run dd if=/dev/zero of=/swapfile bs=1M count=1024
Run mkswap /swapfile
Run swapon /swapfile
Add this line /swapfile swap swap defaults 0 0 to /etc/fstab
Step 4 is needed if you would like to automatically enable swap file after each reboot.
Some useful...
Can Retrofit with OKHttp use cache data when offline
...tworkInterceptors().add(REWRITE_CACHE_CONTROL_INTERCEPTOR);
//setup cache
File httpCacheDirectory = new File(context.getCacheDir(), "responses");
int cacheSize = 10 * 1024 * 1024; // 10 MiB
Cache cache = new Cache(httpCacheDirectory, cacheSize);
//add cache to the client
client.setCache(cache);
...