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Get a substring of a char* [duplicate]
...
char subbuff[5];
memcpy( subbuff, &buff[10], 4 );
subbuff[4] = '\0';
Job done :)
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Check if a string has white space
...) {
return /\s/g.test(s);
}
This will also check for other white space characters like Tab.
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Is there a way to get rid of accents and convert a whole string to regular letters?
...ble" deconstruction
This will separate all of the accent marks from the characters. Then, you just need to compare each character against being a letter and throw out the ones that aren't.
string = string.replaceAll("[^\\p{ASCII}]", "");
If your text is in unicode, you should use this instead...
Convert seconds to Hour:Minute:Second
...ed to that of the TIME data type, which is from -838:59:59 to 838:59:59 :
SELECT SEC_TO_TIME(8525);
# 02:22:05
See: SEC_TO_TIME
Run the Demo
PostgreSQL example:
SELECT TO_CHAR('8525 second'::interval, 'HH24:MI:SS');
# 02:22:05
Run the Demo
...
Setting a timeout for socket operations
... like:
Socket socket = new Socket();
socket.connect(new InetSocketAddress(ipAddress, port), 1000);
Quoting from the documentation
connect
public void connect(SocketAddress endpoint, int timeout) throws IOException
Connects this socket to the server with a specified timeout value. A t...
List columns with indexes in PostgreSQL
...constraint uk_test3ab unique (a, b));
List indexes and columns indexed:
select
t.relname as table_name,
i.relname as index_name,
a.attname as column_name
from
pg_class t,
pg_class i,
pg_index ix,
pg_attribute a
where
t.oid = ix.indrelid
and i.oid = ix.indexreli...
How to configure a HTTP proxy for svn
... @ErikMitchell: Create two versions of the config file and scripts which allow you to switch. Read your OSs docs how to hook into the network discovery mechanism and execute the correct script when your laptop notices where it is.
– Aaron Digulla
O...
Please explain the exec() function and its family
...ed by the caller
You can mix them, therefore you have:
int execl(const char *path, const char *arg, ...);
int execlp(const char *file, const char *arg, ...);
int execle(const char *path, const char *arg, ..., char * const envp[]);
int execv(const char *path, char *const argv[]);
int execvp(const...
Differences between INDEX, PRIMARY, UNIQUE, FULLTEXT in MySQL?
...e - which are typically implemented internally using b-trees (allowing for selecting, sorting or ranges starting from left most column) or hash tables (allowing for selection starting from left most column).
Where the other index types are general-purpose, a FULLTEXT index is specialised, in that it...
Replacing instances of a character in a string
...ce(';', ':') + line[10:]
That'll replace all semi-colons in the first 10 characters of the string.
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