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How to remove last n characters from every element in the R vector
...hat I would do. I hope it's what you're looking for.
char_array = c("foo_bar","bar_foo","apple","beer")
a = data.frame("data"=char_array,"data2"=1:4)
a$data = substr(a$data,1,nchar(a$data)-3)
a should now contain:
data data2
1 foo_ 1
2 bar_ 2
3 ap 3
4 b 4
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A variable modified inside a while loop is not remembered
In the following program, if I set the variable $foo to the value 1 inside the first if statement, it works in the sense that its value is remembered after the if statement. However, when I set the same variable to the value 2 inside an if which is inside a while statement, it's forgotten af...
Laravel: Get base url
Simple question, but the answer seems quite hard to come by. In Codeigniter, I could load the url helper and then simply do
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Is it possible for a computer to “learn” a regular expression by user-provided examples?
Is it possible for a computer to "learn" a regular expression by user-provided examples?
10 Answers
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How do I sort an observable collection?
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Sorting an observable and returning the same object sorted can be done using an extension method. For larger collections watch out for the number of collection changed notifications.
I have updated my code to improve performance (thanks ...
Dynamically access object property using variable
I'm trying to access a property of an object using a dynamic name. Is this possible?
16 Answers
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How to prevent form from being submitted?
I have a form that has a submit button in it somewhere.
10 Answers
10
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Git hangs while writing objects
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I followed VonC's advice:
git config --global http.postBuffer 524288000
For future references, based on comments:
500 MB: 524288000 (as posted in the original answer)
1 GB: 1048576000
2 GB: 2097152000 (anything higher is rejected as 'out of range')
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Remove Item from ArrayList
...hen 3, then 1. This will remove the elements from the list without undesirable side effects.
for (int j = i.length-1; j >= 0; j--) {
list.remove(i[j]);
}
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improve this answer
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Byte order mark screws up file reading in Java
I'm trying to read CSV files using Java. Some of the files may have a byte order mark in the beginning, but not all. When present, the byte order gets read along with the rest of the first line, thus causing problems with string compares.
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