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Selecting with complex criteria from pandas.DataFrame
...se pandas it has some built in functions for comparison. So if you want to select values of "A" that are met by the conditions of "B" and "C" (assuming you want back a DataFrame pandas object)
df[['A']][df.B.gt(50) & df.C.ne(900)]
df[['A']] will give you back column A in DataFrame format.
pan...
What is the difference between the remap, noremap, nnoremap and vnoremap mapping commands in Vim?
...f these sets of mappings, there is a mapping that works in normal, visual, select and operator modes (:map and :noremap), one that works in normal mode (:nmap and :nnoremap), one in visual mode (:vmap and :vnoremap) and so on.
For more guidance on this, see:
:help :map
:help :noremap
:help recursi...
How to perform Unwind segue programmatically?
...our method to connect your source controller to the unwind IBAction.
3) Select the segue in the source view controller's document outline of the storyboard (it will be listed near the bottom), and give it an identifier.
4) Call the unwind segue using this method from source view controller, s...
What does (angle brackets) mean in Java?
...e a reference type. So you can't use primitive types like int or double or char or other primitive types.
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Remove all whitespaces from NSString
...
stringByTrimmingCharactersInSet only removes characters from the beginning and the end of the string, not the ones in the middle.
1) If you need to remove only a given character (say the space character) from your string, use:
[yourString ...
URL Encode a string in jQuery for an AJAX request
... Resource Identifier (URI) component by replacing each instance of certain characters by one, two, three, or four escape sequences representing the UTF-8 encoding of the character (will only be four escape sequences for characters composed of two "surrogate" characters).
Example:
var encoded = en...
How to remove leading zeros from alphanumeric text?
...for start of input rather than start of line). The 0* means zero or more 0 characters (you could use 0+ as well). The replaceFirst just replaces all those 0 characters at the start with nothing.
And if, like Vadzim, your definition of leading zeros doesn't include turning "0" (or "000" or similar s...
How to find what code is run by a button or element in Chrome using Developer Tools
... tab, and on the right find Event
Listener Breakpoints:
Expand Mouse and select click
Now click the element (execution should pause), and you are now debugging the code. You can go through all code pressing F11 (which is Step in). Or go back a few jumps in the stack. There can be a ton of jumps
...
target input by type and name (selector)
...
You want a multiple attribute selector
$("input[type='checkbox'][name='ProductCode']").each(function(){ ...
or
$("input:checkbox[name='ProductCode']").each(function(){ ...
It would be better to use a CSS class to identify those that you want to sele...
How can I grep for a string that begins with a dash/hyphen?
...
The dash is a special character in Bash as noted at http://tldp.org/LDP/abs/html/special-chars.html#DASHREF. So escaping this once just gets you past Bash, but Grep still has it's own meaning to dashes (by providing options).
So you really need t...