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How to get rid of the 'undeclared selector' warning
...t to use a selector on an NSObject instance without the need for an implemented protocol. For example, there's a category method that should set an error property if the NSObject instance it's called on supports it. This is the code, and the code works as intended:
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Check if value exists in Postgres array
...s 9.0, I need a way to test if a value exists in a given array. So far I came up with something like this:
7 Answers
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Get the IP address of the machine
This Question is almost the same as the previously asked Get the IP Address of local computer -Question. However I need to find the IP address(es) of a Linux Machine .
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How do I change bash history completion to complete what's already on the line?
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Probably something like
# ~/.inputrc
"\e[A": history-search-backward
"\e[B": history-search-forward
or equivalently,
# ~/.bashrc
if [[ $- == *i* ]]
then
bind '"\e[A": history-search-backward'
bind '"\e[B": history-search-f...
What is the difference between `new Object()` and object literal notation?
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They both do the same thing (unless someone's done something unusual), other than that your second one creates an object and adds a property to it. But literal notation takes less space in the source code. It's clearly recognizable as to what ...
Zero-based month numbering [closed]
Some popular programming languages use month numbering which is off by 1 -- JavaScript comes to mind, as does Java, and if memory serves, C is another. I have some questions:
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There is no ListBox.SelectionMode=“None”, is there another way to disable selection in a listbox?
...;
By default, ItemsControl doesn't support virtualization of its child elements. If you have a lot of items, virtualization can reduce memory usage and improve performance, in which case you could use approach 2 and style the ListBox, or add virtualisation to your ItemsControl.
Approach 2 - Styling...
Select all elements with “data-” attribute without using jQuery
Using only JavaScript, what is the most efficient way to select all DOM elements that have a certain data- attribute (let's say data-foo ). The elements may be different tag elements.
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How to overwrite the previous print to stdout in python?
... print '{0}\r'.format(x),
print
The comma at the end of the print statement tells it not to go to the next line. The last print statement advances to the next line so your prompt won't overwrite your final output.
Update
Now that Python 2 is EOL, a Python 3 answer makes more sense. For Python 3....
Why we should not use protected static in java
...uestion Is there a way to override class variables in Java?
The first comment with 36 upvotes was:
8 Answers
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