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What is meant by immutable?
...only. It makes it completely explicit that the field is immutable. Right now it's immutable by convention
– JaredPar
Nov 11 '08 at 0:15
7
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Converting strings to floats in a DataFrame
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NOTE: pd.convert_objects has now been deprecated. You should use pd.Series.astype(float) or pd.to_numeric as described in other
answers.
This is available in 0.11. Forces conversion (or set's to nan)
This will work even when astype will fail; its als...
Codeigniter - no input file specified
...s inside my public_html folder back to original .htaccess content. So it's now as follows (which is originally it was):
DirectoryIndex index.php
RewriteEngine on
RewriteCond $1 !^(index\.php|images|css|js|robots\.txt|favicon\.ico)
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !...
Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...ird value returns true - 128 == 128 is evaluated, and is of course, true.
Now, a fair bit happens to make that third result true:
An unboxing conversion occurs with respect to the equivalence operator you're using and the datatypes you have - namely, int and Integer. You're getting an Integer fr...
Syntax error on print with Python 3 [duplicate]
..., print became a function. This means that you need to include parenthesis now like mentioned below:
print("Hello World")
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What are the use-cases for Web Workers? [closed]
... changing, wait till status changes to "all calculations complete, you can now review the final #s and save".
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How do I get class name in PHP?
...function getClass()
{
return get_class();
}
}
Now you can do:
$className = MyClass::getClass();
This is somewhat limited, however, because if my class is extended it will still return 'MyClass'. We can use get_called_class instead, which relies on Late Static Binding...
How do I extract a sub-hash from a hash?
...gt; 4}
extracted_slice = initial_hash.slice!(:a, :c)
initial_hash would now be
{:b => 2, :d =>4}
extracted_slide would now be
{:a => 1, :c =>3}
You can look at slice.rb in ActiveSupport 3.1.3
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Get/pick an image from Android's built-in Gallery app programmatically
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// this is the action code we use in our intent,
// this way we know we're looking at the response from our own action
private static final int SELECT_PICTURE = 1;
private String selectedImagePath;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(saved...
Statistics: combinations in Python
... N and K due to floating point precision. But we can fix that - see above, now it should not err for big numbers
– Nas Banov
Sep 17 '13 at 1:17
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