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Any equivalent to .= for adding to beginning of string in PHP?
...n assignment operator and no one commented on its usage for general string concatenation.
You may want to look into the use of the sprintf (documentation) family of functions for string concatenation.
It provides a lot more sanitization and usability than just combining two strings with assignment ...
Why does SIGPIPE exist?
... answered Dec 3 '11 at 17:29
Charlie MartinCharlie Martin
100k2222 gold badges175175 silver badges249249 bronze badges
...
How to compare strings ignoring the case
...t; false
>> require 'active_support/all'
=> true
>> str1.mb_chars.downcase.to_s.casecmp(str2.mb_chars.downcase.to_s) == 0
=> true
It works this way in Ruby 2.3.1 and earlier versions.
For smaller memory footprint you can cherry pick string/multibyte:
require 'active_support'
re...
How can I add reflection to a C++ application?
...ld itself). This macro will be called like this:
REFLECTABLE
(
(const char *) name,
(int) age
)
So using Boost.PP we iterate over each argument and generate the data like this:
// A helper metafunction for adding const to a type
template<class M, class T>
struct make_const
{
ty...
Why can't I use float value as a template parameter?
...
The current C++ standard does not allow float (i.e. real number) or character string literals to be used as template non-type parameters. You can of course use the float and char * types as normal arguments.
Perhaps the author is using a compiler that doesn't follow the current standard?
...
How to convert comma-delimited string to list in Python?
...
You can use this function to convert comma-delimited single character strings to list-
def stringtolist(x):
mylist=[]
for i in range(0,len(x),2):
mylist.append(x[i])
return mylist
share
...
What is the bit size of long on 64-bit Windows?
...bit' and 'long, pointers are 64-bit'.
Type ILP64 LP64 LLP64
char 8 8 8
short 16 16 16
int 64 32 32
long 64 64 32
long long 64 64 64
pointer 64 64 64
The ILP64 sys...
Signed to unsigned conversion in C - is it always safe?
... need to subtract the given number from max value (256 in case of unsigned char)? For example: 140 when converted to signed number becomes -116. But 20 becomes 20 itself. So any easy trick here?
– Jon Wheelock
Oct 18 '15 at 14:01
...
Join vs. sub-query
...tion level).
Nested sub-queries
SELECT moo, bar
FROM (
SELECT moo, CONCAT(roger, wilco) AS bar
FROM foo
GROUP BY moo
HAVING bar LIKE 'SpaceQ%'
) AS temp_foo
ORDER BY bar
You can nest sub-queries in multiple levels. This can help on huge datasets if you have to group o...
Split string, convert ToList() in one line
...ion method
public static List<int> SplitToIntList(this string list, char separator = ',')
{
return list.Split(separator).Select(Int32.Parse).ToList();
}
usage:
var numberListString = "1, 2, 3, 4";
List<int> numberList = numberListString.SplitToIntList(',');
...