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how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?
...n.
You can of course wrap this in a function if you don't want to put the extra code on the client side. You also need a loop for the very rare race condition in that thinking.
There's an example of this in the documentation: http://www.postgresql.org/docs/9.3/static/plpgsql-control-structures.ht...
How to create a directory if it doesn't exist using Node.js?
...ends fs to have this functionality such as github.com/jprichardson/node-fs-extra
– Bret
Jul 28 '14 at 1:00
1
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Breaking up long strings on multiple lines in Ruby without stripping newlines
... be wider than 80 characters. Since this is a Rails project, we often have strings that are a little bit longer - i.e. " User X wanted to send you a message about Thing Y " that doesn't always fit within the 80 character style limit.
...
C++ - passing references to std::shared_ptr or boost::shared_ptr
...a message somewhere. It may be a large message so rather than using a std::string that likely gets copied as it is passed around to multiple places, we use a shared_ptr to a string:
void send_message(std::shared_ptr<std::string> msg)
{
std::cout << (*msg.get()) << std::endl;
}...
How to pass data from 2nd activity to 1st activity when pressed back? - android
...f (requestCode == 1) {
if(resultCode == RESULT_OK) {
String strEditText = data.getStringExtra("editTextValue");
}
}
}
If you can, also use SharedPreferences for sharing data between Activities.
...
File Upload without Form
...es of file_field to form_data
form_data.append("user_id", 123) // Adding extra parameters to form_data
$.ajax({
url: "/upload_avatar", // Upload Script
dataType: 'script',
cache: false,
contentType: false,
processData: false,
data: form_data, // Setting the data attribute...
Different ways of adding to Dictionary
...e value of the key if it already exists in the dictionary.
IDictionary<string, string> strings = new Dictionary<string, string>();
strings["foo"] = "bar"; //strings["foo"] == "bar"
strings["foo"] = string.Empty; //strings["foo"] == string.empty
strings.Add("foo", "bar"); ...
Calling a class function inside of __init__
...
Oops, sorry there should have been an extra layer of indenting under the "class MyClass():" line. I've fixed it above, but the question remains the same.
– PythonJin
Sep 28 '12 at 19:55
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Cast from VARCHAR to INT - MySQL
...ution. - - - - - - - - - - - - - Long Version: From the manual: To cast a string to a number, you normally need do nothing other than use the string value in numeric context Although I'd use +0 instead of *1 since addition is faster.
– Mindwin
Oct 24 '16 at 14...
How to find files that match a wildcard string in Java?
This should be really simple. If I have a String like this:
16 Answers
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