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How do I show/hide a UIBarButtonItem?
... to hide/show one of the buttons depending on the state of the data in the main window.
37 Answers
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How do I get the difference between two Dates in JavaScript?
I'm creating an application which lets you define events with a time frame. I want to automatically fill in the end date when the user selects or changes the start date. I can't quite figure out, however, how to get the difference between the two times, and then how to create a new end Date using ...
PHP 5 disable strict standards error
I need to setup my PHP script at the top to disable error reporting for strict standards.
7 Answers
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Create a branch in Git from another branch
I have two branches: master and dev
9 Answers
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iOS - forward all touches through a view
I have a view overlayed on top of many other views. I am only using the overaly to detect some number of touches on the screen, but other than that I don't want the view to stop the behavior of other views underneath, which are scrollviews, etc. How can I forward all the touches through this overlay...
如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
如何选择机器学习算法Choosing-a-Machine-Learning-Classifier如何针对某个分类问题决定使用何种机器学习算法？ 当然，如果你真心在乎准确率，最好的途径就是测试一大堆各式各样的算法（同时确保在每个算法上也测试不同的参数），...
How to find out if an item is present in a std::vector?
All I want to do is to check whether an element exists in the vector or not, so I can deal with each case.
18 Answers
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How to add color to Github's README.md file
I have a README.md file for my project underscore-cli , a pretty sweet tool for hacking JSON and JS on the command-line.
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Dynamically select data frame columns using $ and a character value
I have a vector of different column names and I want to be able to loop over each of them to extract that column from a data.frame. For example, consider the data set mtcars and some variable names stored in a character vector cols . When I try to select a variable from mtcars using a dynamic s...
Java List.add() UnsupportedOperationException
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Not every List implementation supports the add() method.
One common example is the List returned by Arrays.asList(): it is documented not to support any structural modification (i.e. removing or adding elements) (emphasis mine):
Returns...