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How to concatenate two strings in C++?
...e performance. Worst case is, that operator+= performs both a deallocation and an allocation. Heap allocations are among the most expensive operations we commonly do.
– IInspectable
Feb 7 at 12:17
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What is that “total” in the very first line after ls -l? [closed]
...m does not mention that line, but info coreutils ls does. How comes man ls and info coreutils ls have different information about the same command? Why isn't ls just documented once? Having two different documentations for the same command seems like set up for failure.
– Hello...
For every character in string
...loop (it's from C++11, already supported in recent releases of GCC, clang, and the VC11 beta):
std::string str = ???;
for(char& c : str) {
do_things_with(c);
}
Looping through the characters of a std::string with iterators:
std::string str = ???;
for(std::string::iterator it = str.begin()...
How to use Git and Dropbox together effectively?
Is it possible to use Git and Dropbox together effectively?
20 Answers
20
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What's the point of JAXB 2's ObjectFactory classes?
I'm new to using JAXB, and I used JAXB 2.1.3's xjc to generate a set of classes from my XML Schema. In addition to generating a class for each element in my schema, it created an ObjectFactory class.
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List of tables, db schema, dump etc using the Python sqlite3 API
... can't find a way to get the equivalents of sqlite's interactive shell commands:
11 Answers
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Regular Expression For Duplicate Words
I'm a regular expression newbie, and I can't quite figure out how to write a single regular expression that would "match" any duplicate consecutive words such as:
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List of all index & index columns in SQL Server DB
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There are two "sys" catalog views you can consult: sys.indexes and sys.index_columns.
Those will give you just about any info you could possibly want about indices and their columns.
EDIT: This query's getting pretty close to what you're looking for:
SELECT
TableName = t.name,
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Split output of command by columns using Bash?
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And also, the field nunbers will be off if some PID:s are space padded on the left while others are not.
– tripleee
Mar 4 '15 at 14:58
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What are the differences between utf8_general_ci and utf8_unicode_ci? [duplicate]
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utf8_general_ci is a very simple — and on Unicode, very broken — collation, one that gives incorrect results on general Unicode text. What it does is:
converts to Unicode normalization form D for canonical decomposition
removes any combining characters
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