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How to make an Android Spinner with initial text “Select One”?
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Here's a general solution that overrides the Spinner view. It overrides setAdapter() to set the initial position to -1, and proxies the supplied SpinnerAdapter to display the prompt string for position less than 0.
This has been tested on Android 1.5 through 4.2, but buyer beware! Because this s...
What is the best way to use a HashMap in C++?
... editor after snippets, if snippets enabled
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Check string for palindrome
A palindrome is a word, phrase, number or other sequence of units that can be read the same way in either direction.
39 A...
What's the difference between the WebConfigurationManager and the ConfigurationManager?
...igurationManager is located in the System.Web assembly the ConnectionStringSettingsCollection that it returns is located in System.Configuration.
If you are getting the error
Cannot apply indexing with [] to an expression of type
'System.Configuration.ConnectionStringSettingsCollection'
wh...
Where does the iPhone Simulator store its data?
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For Xcode6+/iOS8+
~/Library/Developer/CoreSimulator/Devices/[DeviceID]/data/Containers/Data/Application/[AppID]/
Accepted answer is correct for SDK 3.2 - SDK 4 replaces the /User folder in that path with a number for each o...
How to drop a list of rows from Pandas dataframe?
...positional indexes to drop ([1, 2, 4] in the question).
indexes_to_keep = set(range(df.shape[0])) - set(indexes_to_drop)
df_sliced = df.take(list(indexes_to_keep))
In my case this took 20.5s, while the simple df.drop took 5min 27s and consumed a lot of memory. The resulting DataFrame is the same....
Go to particular revision
...lowing commands. HASH-CODE you can get from git log --oneline -n 10
git reset --hard HASH-CODE
Note - After reset to particular version/commit you can run git pull --rebase, if you want to bring back all the commits which are discarded.
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How to convert a string into double and vice versa?
I want to convert a string into a double and after doing some math on it, convert it back to a string.
12 Answers
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How do I insert a linebreak where the cursor is without entering into insert mode in Vim?
... the next space and repeat the last command.
Depending on your autoindent settings, the above may or may not indent the return statement properly. If not, then use sEnterTabEsc instead to replace the space with a newline, indent the line, and exit insert mode. You would have to replace the second s...
Python中的X[:,0]和X[:,1] - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
Python中的X[:,0]和X[:,1]X[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维数组第一维中的所有数据，第二维中取第0个数据，直观来说，X[:,0]就是取所有 X[:,0]是numpy中数组的一种写法，表示对一个二维数组，取该二维...