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How can I safely create a nested directory?
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Depending on the application, the danger of concurrent operations may be more or less than the danger posed by other factors such as file permissions. The developer would have to know more about the particular application being developed and its expected environment before choosing an implementati...
Turn off autosuggest for EditText?
...ion but I still wanted to set this option in my XML file so I did a little more research until I found it out myself.
Add this line into your EditText.
android:inputType="textFilter"
Here is a Tip. Use this line if you want to be able to use the "enter" key.
android:inputType="textFilter|textM...
SSL certificate rejected trying to access GitHub over HTTPS behind firewall
...s for years now on both Linux, Macs and Windows.
If you want you can read more about it in this blog post
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Ukkonen's suffix tree algorithm in plain English
...ere is one step for every character of the string. Each step might involve more than one individual operation, but we will see (see the final observations at the end) that the total number of operations is O(n).
So, we start from the left, and first insert only the single character
a by creating an...
Plotting two variables as lines using ggplot2 on the same graph
...olour='var_names' as specified by hadley works fine. but @DaveX - would be more specific if one wants to choose specific colors rather than automatically selected colours by the function.
– I_m_LeMarque
Apr 5 '19 at 9:42
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Adding two Java 8 streams, or an extra element to a stream
... pollution). So, it might be better to create your own static methods with more meaningful names. However, for demonstration I will stick with this name.
public static <T> Stream<T> concat(Stream<? extends T> lhs, Stream<? extends T> rhs) {
return Stream.concat(lhs, rhs)...
How do I display the current value of an Android Preference in the Preference summary?
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There are ways to make this a more generic solution, if that suits your needs.
For example, if you want to generically have all list preferences show their choice as summary, you could have this for your onSharedPreferenceChanged implementation:
public ...
How do malloc() and free() work?
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OK some answers about malloc were already posted.
The more interesting part is how free works (and in this direction, malloc too can be understood better).
In many malloc/free implementations, free does normally not return the memory to the operating system (or at least only in...
Change column type from string to float in Pandas
...supports pd.NA (pandas' object to indicate a missing value).
Read on for more detailed explanations and usage of each of these methods.
1. to_numeric()
The best way to convert one or more columns of a DataFrame to numeric values is to use pandas.to_numeric().
This function will try to change non-...
Is there a simple way to remove multiple spaces in a string?
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