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What are carriage return, linefeed, and form feed?
... beginning of the current line without advancing downward. The name comes from a printer's carriage, as monitors were rare when the name was coined. This is commonly escaped as \r, abbreviated CR, and has ASCII value 13 or 0x0D.
Linefeed means to advance downward to the next line; however, it has...
Change a column type from Date to DateTime during ROR migration
I need to change my column type from date to datetime for an app I am making. I don't care about the data as its still being developed.
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Thread pooling in C++11
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This is copied from my answer to another very similar post, hope it can help:
1) Start with maximum number of threads a system can support:
int Num_Threads = thread::hardware_concurrency();
2) For an efficient threadpool implementation...
Is there a Python function to determine which quarter of the year a date is in?
...for first quarter, 1 for second quarter, etc -- add 1 if you need to count from 1 instead;-).
Originally two answers, multiply upvoted and even originally accepted (both currently deleted), were buggy -- not doing the -1 before the division, and dividing by 4 instead of 3. Since .month goes 1 to...
Issue with adding common code as git submodule: “already exists in the index”
...projects. I created a separate git repo for the common code and removed it from the projects with the plan to add it as a git submodule.
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How to create a custom exception type in Java? [duplicate]
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You need to create a class that extends from Exception. It should look like this:
public class MyOwnException extends Exception {
public MyOwnException () {
}
public MyOwnException (String message) {
super (message);
}
public MyOwnEx...
django urls without a trailing slash do not redirect
...matically redirect to login/, and then serve the latter as the main page:
from django.conf.urls import patterns
from django.views.generic import RedirectView
urlpatterns = patterns('',
# Redirect login to login/
(r'^login$', RedirectView.as_view(url = '/login/')),
# Handle the page wit...
How do I check if a given string is a legal/valid file name under Windows?
...e [a-zA-Z0-9_]+ but it doesn't include many national-specific characters from various languages (e.g. umlauts and so on). What is the best way to do such a check?
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Why should I avoid using Properties in C#?
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@PatrickFromberg: You've missed a large amount of code which uses read-only fields, apparently. There's nothing to say that properties imply mutability. I often have read-only fields backing read-only properties - do you think that's...
Add regression line equation and R^2 on graph
... = 300, label = lm_eqn(df), parse = TRUE)
EDIT. I figured out the source from where I picked this code. Here is the link to the original post in the ggplot2 google groups
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