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What does “dereferencing” a pointer mean?
...he pointer may be relative to some specific memory area, which the CPU may select based on CPU "segment" registers or some manner of segment id encoded in the bit-pattern, and/or looking in different places depending on the machine code instructions using the address.
For example, an int* properly ...
std::wstring VS std::string
...s between std::string and std::wstring . I know wstring supports wide characters such as Unicode characters. I have got the following questions:
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Escaping ampersand character in SQL string
...
straight from oracle sql fundamentals book
SET DEFINE OFF
select 'Coda & Sid' from dual;
SET DEFINE ON
how would one escape it without setting define.
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Why unsigned integer is not available in PostgreSQL?
...< 65536);
Here is what psql gives when I try to abuse the type.
DS1=# select (346346 :: uint2);
ERROR: value for domain uint2 violates check constraint "uint2_check"
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Get string character by index - Java
I know how to work out the index of a certain character or number in a string, but is there any predefined method I can use to give me the character at the nth position? So in the string "foo", if I asked for the character with index 0 it would return "f".
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How to convert a char array back to a string?
I have a char array:
15 Answers
15
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How to change the CHARACTER SET (and COLLATION) throughout a database?
...re schema to utf8. Hope this helps!
-- Change DATABASE Default Collation
SELECT DISTINCT concat('ALTER DATABASE `', TABLE_SCHEMA, '` CHARACTER SET utf8 COLLATE utf8_unicode_ci;')
from information_schema.tables
where TABLE_SCHEMA like 'database_name';
-- Change TABLE Collation / Char Set
SELECT...
Apply formula to the entire column
...olumn B as the image from the OP. For me, It simply fills the value of the selected cell.
– Assimilater
Aug 4 '15 at 23:04
11
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Conveniently Declaring Compile-Time Strings in C++
...y cumbersome, as the string needs to be declared as a variadic sequence of characters, e.g.
15 Answers
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Length of string in bash
...NG=C LC_ALL=C
bytlen=${#myvar}
LANG=$oLang LC_ALL=$oLcAll
printf "%s is %d char len, but %d bytes len.\n" "${myvar}" $chrlen $bytlen
will render:
Généralités is 11 char len, but 14 bytes len.
you could even have a look at stored chars:
myvar='Généralités'
chrlen=${#myvar}
oLang=$LANG oLc...