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Single quotes vs. double quotes in Python [closed]
...if you're going to have to use escape characters to represent apostrophes? Does it offend coders to read novels? I can't imagine how painful high school English class was for you!
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Combine two data frames by rows (rbind) when they have different sets of columns
...two base R methods: One that alters the original data.frames, and one that doesn't. Additionally, I offer a method that generalizes the non-destructive method to more than two data.frames.
First, let's get some sample data.
# sample data, variable c is in df1, variable d is in df2
df1 = data.frame...
Setting DIV width and height in JavaScript
...gner wants to change the definition of what it means to be wide, he or she does not need to go poking around in your beautifully maintained JavaScript code. Your JavaScript code remains untouched, yet the theme of your application can be easily customized.
This technique follows the rule of separat...
How do I open the SearchView programmatically?
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Hello, a keyboard pops-up but the SearchView does not open.
– Eli Revah
Jan 9 '13 at 13:21
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Constant pointer vs Pointer to constant [duplicate]
...even this code int i = 10; const int* ptr = &i; works. which means ptr doesn't have to point to a constant value always. You can also point to a variable value through it. It is just that you will never be able to modify the value pointed by ptr.
– RBT
Sep ...
What is the difference between Collection and List in Java?
...ents and others do not.
Some are ordered and others unordered.
The JDK does not provide any direct
implementations of this interface: it
provides implementations of more
specific subinterfaces like Set and
List. This interface is typically used
to pass collections around and
manipula...
How can I get a list of all functions stored in the database of a particular schema in PostgreSQL?
...r and tried the query on Postgres 11.5. It says: ERROR: column p.proisagg does not exist
– Christiaan Westerbeek
Apr 30 at 11:50
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Generate random numbers with a given (numerical) distribution
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it does exactly the same w.r.t. to the original question. E.g.: numpy.random.choice(numpy.arange(1, 7), p=[0.1, 0.05, 0.05, 0.2, 0.4, 0.2])
– Eugene Pakhomov
Jun 20 '16 at 12:17
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How can I change the copyright template in Xcode 4?
Does anyone know how to change copyright in the templates for Xcode? That is, at the top of a new file it writes:
5 Answers...
What is the difference between syntax and semantics in programming languages?
...he sentence. It answers the questions: is this sentence valid? If so, what does the sentence mean? For example:
x++; // increment
foo(xyz, --b, &qrs); // call foo
are syntactically valid C statements. But what do they mean? Is it even valid to attempt to transform these stat...