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Is there a difference between copy initialization and direct initialization?
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Bah, sorry folks, but i had to remove my comment and post it again, because of the new formatting engine: It's because in function parameters, R() == R(*)() and T[] == T* . That is, function types are function pointer types, and array types are pointer-to-element...
Get cursor position (in characters) within a text Input field
...g information. I was looking at cursor positions when entertaing text. My fiddle demonstrating this is: jsfiddle.net/fallenreaper/TSwyk
– Fallenreaper
Mar 6 '13 at 20:27
1
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Change column type from string to float in Pandas
...output to a variable or column name to continue using it:
# convert Series
my_series = pd.to_numeric(my_series)
# convert column "a" of a DataFrame
df["a"] = pd.to_numeric(df["a"])
You can also use it to convert multiple columns of a DataFrame via the apply() method:
# convert all columns of DataF...
What is “missing” in the Visual Studio 2008 Express Editions?
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@George: interesting - my C++ Express installations (including VC++ 2010 Express) don't get any x64 compilers - are you getting x64 support by installing the Windows SDK?
– Michael Burr
Apr 17 '10 at 20:59
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PHP - concatenate or directly insert variables in string
...re are performance implications, those won't matter 1.
As a sidenote, so my answer is a bit more complete: the day you'll want to do something like this:
echo "Welcome $names!";
PHP will interpret your code as if you were trying to use the $names variable -- which doesn't exist.
- note that it ...
MYSQL import data from csv using LOAD DATA INFILE
I am importing some data of 20000 rows from a CSV file into Mysql.
11 Answers
11
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Add a reference column migration in Rails 4
... Active Record only supports single column foreign keys and currently only mysql, mysql2 and PostgreSQL adapters are supported. Don't try this with other adapters like sqlite3, etc. Refer to Rails Guides: Foreign Keys for your reference.
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Overriding fields or properties in subclasses
...ic behavior. You should remember though, that when at runtime the property MyInt is accessed, the derived class has no control on the value returned. The base class by itself is capable of returning this value.
This is how a truly polymorphic implementation of your property might look, allowing the...
How do you display a Toast from a background thread on Android?
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I'm not sure I understand how to do this. I have my existing public void run(). I tried putting this code there. I know that's not right because it didn't work, but I am really stuck.
– SwimBikeRun
Mar 4 '12 at 6:04
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JS: iterating over result of getElementsByClassName using Array.forEach
...r NodeList) as the this value:
var els = document.getElementsByClassName("myclass");
Array.prototype.forEach.call(els, function(el) {
// Do stuff here
console.log(el.tagName);
});
// Or
[].forEach.call(els, function (el) {...});
If you're in the happy position of being able to use ES6 (...