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Why should I use var instead of a type? [duplicate]
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110
It's really just a coding style. The compiler generates the exact same for both variants.
See...
Is there any particular difference between intval and casting to int - `(int) X`?
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193
intval() can be passed a base from which to convert. (int) cannot.
int intval( mixed $var [,...
Capistrano - clean up old releases
...t's intended purpose? Is there another way to cleanup old releases to just 1 previous deploy?
4 Answers
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Regular expressions in C: examples?
...s):
#include <regex.h>
regex_t regex;
int reti;
char msgbuf[100];
/* Compile regular expression */
reti = regcomp(&regex, "^a[[:alnum:]]", 0);
if (reti) {
fprintf(stderr, "Could not compile regex\n");
exit(1);
}
/* Execute regular expression */
reti = regexec(&regex,...
how to provide a swap function for my class?
...amp; lhs, Bar& rhs) {
// ...
}
}
If swap is now used as shown in 1), your function will be found. Also, you may make that function a friend if you absolutely need to, or provide a member swap that is called by the free function:
// version 1
class Bar{
public:
friend void swap(Bar&...
Trying to embed newline in a variable in bash [duplicate]
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176
Summary
Inserting \n
p="${var1}\n${var2}"
echo -e "${p}"
Inserting a new line in the sourc...
Drop unused factor levels in a subsetted data frame
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14 Answers
14
Active
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On Duplicate Key Update same as insert
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Alternatively, you can use:
INSERT INTO table (id,a,b,c,d,e,f,g)
VALUES (1,2,3,4,5,6,7,8)
ON DUPLICATE KEY
UPDATE a=a, b=b, c=c, d=d, e=e, f=f, g=g;
To get the id from LAST_INSERT_ID; you need to specify the backend app you're using for the same.
For LuaSQL, a conn:getlastautoid() fetches ...
Initialising an array of fixed size in python [duplicate]
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11 Answers
11
Active
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How to check if a table exists in a given schema
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answered Jun 6 '14 at 19:58
Erwin BrandstetterErwin Brandstetter
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