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Getting the encoding of a Postgres database
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A programmatic solution:
SELECT pg_encoding_to_char(encoding) FROM pg_database WHERE datname = 'yourdb';
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Replace a character at a specific index in a string?
I'm trying to replace a character at a specific index in a string.
8 Answers
8
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Why use double indirection? or Why use pointers to pointers?
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If you want to have a list of characters (a word), you can use char *word
If you want a list of words (a sentence), you can use char **sentence
If you want a list of sentences (a monologue), you can use char ***monologue
If you want a list of monologue...
Check substring exists in a string in C
...lusplus.com/reference/clibrary/cstring/strstr/
So, you'd write it like..
char *sent = "this is my sample example";
char *word = "sample";
char *pch = strstr(sent, word);
if(pch)
{
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}
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How to escape JSON string?
... edited Jun 6 '17 at 23:57
Richard Ev
47.6k5353 gold badges179179 silver badges271271 bronze badges
answered Jan 30 '14 at 11:40
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Get a substring of a char* [duplicate]
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char subbuff[5];
memcpy( subbuff, &buff[10], 4 );
subbuff[4] = '\0';
Job done :)
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PHP passing $_GET in linux command prompt
...RL in single quotes, as the ? and & in the query portion are shell metacharacters (single char wildcard + "run this command in the background").
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Count number of records returned by group by
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You can do both in one query using the OVER clause on another COUNT
select
count(*) RecordsPerGroup,
COUNT(*) OVER () AS TotalRecords
from temptable
group by column_1, column_2, column_3, column_4
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Why is list initialization (using curly braces) better than the alternatives?
...t be converted to another integer that cannot hold its value. For example, char
to int is allowed, but not int to char.
A floating-point value cannot be converted to another floating-point type that cannot hold its
value. For example, float to double is allowed, but not double to float.
A floating-p...
Repeat string to certain length
... to compute the number of full repetitions needed, and the number of extra characters, all at once:
def pillmod_repeat_to_length(s, wanted):
a, b = divmod(wanted, len(s))
return s * a + s[:b]
Which is better? Let's benchmark it:
>>> import timeit
>>> timeit.repeat('sche...