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How do you make Git ignore files without using .gitignore?
...ernal weird constraints I cannot modify the .gitignore of my repository. Is there a way to ignore files and directories other than modifying a .gitignore ? Even if it is a global solution like a global configuration that will be applied to all my repositories.
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How to force R to use a specified factor level as reference in a regression?
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See the relevel() function. Here is an example:
set.seed(123)
x <- rnorm(100)
DF <- data.frame(x = x,
y = 4 + (1.5*x) + rnorm(100, sd = 2),
b = gl(5, 20))
head(DF)
str(DF)
m1 <- lm(y ~ x + b, data = DF)
summary(m1...
How should strace be used?
... debugger. It allows a programmer / user to quickly find out how a program is interacting with the OS. It does this by monitoring system calls and signals.
Uses
Good for when you don't have source code or don't want to be bothered to really go through it.
Also, useful for your own code if you don't...
When to use Comparable and Comparator
I have a list of objects I need to sort on a field, say Score. Without giving much thought I wrote a new class that implements Comparator, that does the task and it works.
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How do I pass JavaScript variables to PHP?
... PHP code runs at the server side, and it doesn't know anything about what is going on on the client side.
You need to pass variables to PHP code from the HTML form using another mechanism, such as submitting the form using the GET or POST methods.
<DOCTYPE html>
<html>
<head>
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Django set default form values
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You can use initial which is explained here
You have two options either populate the value when calling form constructor:
form = JournalForm(initial={'tank': 123})
or set the value in the form definition:
tank = forms.IntegerField(widget=forms.Hi...
View HTTP headers in Google Chrome?
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edited Jan 5 '17 at 19:20
Jeff Atwood
59.7k4545 go...
use localStorage across subdomains
...localStorage on browsers that can support it (anyone but IE). The problem is site.com and www . site.com store their own separate localStorage objects. I believe www is considered a subdomain (a stupid decision if you ask me). If a user was originally on site.com and decides to type in www ....
Why does ConcurrentHashMap prevent null keys and values?
The JavaDoc of ConcurrentHashMap says this:
7 Answers
7
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What's the significance of Oct 12 1999? [closed]
...people on the ASP.NET Team. The dev who wrote THAT line of code, we think, is gone. We asked The Gu, and he wasn't sure.
Stefan Schackow, from the team, said, after speaking with Manu Vasandani:
"The ASP.NET developers were being
chased by a pack of feral ninjas on
fire and thus were under...