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Efficient way to return a std::vector in c++
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vector<string> getseq(char * db_file)
And if you want to print it on main() you should do it in a loop.
int main() {
vector<string> str_vec = getseq(argv[1]);
for(vector<string>::iterator it = str_vec.beg...
String vs. StringBuilder
I understand the difference between String and StringBuilder ( StringBuilder being mutable) but is there a large performance difference between the two?
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Should I inherit from std::exception?
...s no way to pass a message to std::exception. std::runtime_error accepts a string and is derived from std::exception.
– Martin York
Nov 3 '09 at 19:59
14
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Python int to binary string?
...re any canned Python methods to convert an Integer (or Long) into a binary string in Python?
35 Answers
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SQL SELECT WHERE field contains words
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Note that if you use LIKE to determine if a string is a substring of another string, you must escape the pattern matching characters in your search string.
If your SQL dialect supports CHARINDEX, it's a lot easier to use it instead:
SELECT * FROM MyTable
WHERE CHARI...
iOS Detect 3G or WiFi
...der] carrierName];
if ([netinfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyGPRS]) {
NSLog(@"2G");
} else if ([netinfo.currentRadioAccessTechnology isEqualToString:CTRadioAccessTechnologyEdge]) {
NSLog(@"2G");
} else if ([netinfo.currentRadioAcces...
android pick images from gallery
...& null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int colu...
Command-line Unix ASCII-based charting / plotting tool
Is there a good command-line UNIX charting / graphing / plotting tool out there? I'm looking for something that will plot xy points on an ASCII graph.
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Open another application from your own (intent)
...ndle extras = getIntent().getExtras() => if(extras != null) { extras.getString("blah") } etc
– Gaurav Vaish
Nov 19 '13 at 1:24
2
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How do I assign an alias to a function name in C++?
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Example: there are two overloads of function std::stoi
int stoi (const string&, size_t*, int);
int stoi (const wstring&, size_t*, int);
If you want to make an alias to the first version you should use the following:
const auto& new_fn_name = static_cast<int(*)(const string&...