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Rails raw SQL example
How can I convert this code to raw sql and use in rails? Because When I deploy this code in heroku,there is a request timeout error.I think this will be faster if I use raw sql.
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How to add item to the beginning of List?
...o be an IEnumerable.
// Creating an array of numbers
var ti = new List<int> { 1, 2, 3 };
// Prepend and Append any value of the same type
var results = ti.Prepend(0).Append(4);
// output is 0, 1, 2, 3, 4
Console.WriteLine(string.Join(", ", results ));
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psycopg2: insert multiple rows with one query
...e which allows an iterator yielding strings to be read like a file. We can convert each input record to a string using a generator expression. So the solution would be
args = [(1,2), (3,4), (5,6)]
f = IteratorFile(("{}\t{}".format(x[0], x[1]) for x in args))
cursor.copy_from(f, 'table_name', column...
How to get Android crash logs?
...oaded by other people and crashing on remote devices, you may want to look into an Android error reporting library (referenced in this SO post). If it's just on your own local device, you can use LogCat. Even if the device wasn't connected to a host machine when the crash occurred, connecting the ...
How to complete a git clone for a big project on an unstable connection?
...epository for you if you can communicate with the provider. You can easily convert the bare repository to a full repository. Also read the comments in that answer as a shallow clone may not always help.
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Using Razor, how do I render a Boolean to a JavaScript variable?
...o use the namespace System.Xml):
var myViewModel = {
isFollowing: @XmlConvert.ToString(Model.IsFollowing)
};
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Github (SSH) via public WIFI, port 22 blocked
...y + corkscrew
First configure tor from fist step.
Then install privoxy to convert tor SOCKS5 to HTTP proxy.
sudo apt install privoxy
Then install corkscrew
sudo apt install corkscrew
Place this config file in: ~/.ssh/config
host *
ProxyCommand corkscrew 127.0.0.1 8118 %h %p
Or with ncat
Host g...
Return value in a Bash function
...5, 0 meaning "success"). So return is not what you want.
You might want to convert your return statement to an echo statement - that way your function output could be captured using $() braces, which seems to be exactly what you want.
Here is an example:
function fun1(){
echo 34
}
function fun2()...
When to use virtual destructors?
...en you might potentially delete an instance of a derived class through a pointer to base class:
class Base
{
// some virtual methods
};
class Derived : public Base
{
~Derived()
{
// Do some important cleanup
}
};
Here, you'll notice that I didn't declare Base's destructo...
What is the convention for word separator in Java package names?
...ins a hyphen, or any other special character not allowed in an identifier, convert it into an underscore.
If any of the resulting package name components are keywords then append underscore to them.
If any of the resulting package name components start with a digit, or any other character that i...