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How to count TRUE values in a logical vector
... can handle NA's in logical vector.
For instance:
# create dummy variable
set.seed(100)
x <- round(runif(100, 0, 1))
x <- x == 1
# create NA's
x[seq(1, length(x), 7)] <- NA
If you type in sum(x) you'll get NA as a result, but if you pass na.rm = TRUE in sum function, you'll get the resul...
Python Requests and persistent sessions
...alue. For localhost, web server should return cookies with domain property set to localhost.local, otherwise the cookie will not be applied to the session. In that case use 127.0.0.1 instead of localhost
– Sergey Nudnov
Apr 30 at 19:11
...
Get the name of an object's type
...tor property that points to Object, not Thingy. So we fall right at the outset; you simply cannot trust constructor in a codebase that you don't control.
Multiple Inheritance
An example where it isn't as obvious is using multiple inheritance:
function a() { this.foo = 1;}
function b() { this.bar = 2...
Difference between map, applymap and apply methods in Pandas
...taframe is only modified by either reassigning df = modified_df or if you set inplace=True flag. Also dataframe will change if you pass a dataframe to a function by reference and the function modifies the dataframe
– muon
Apr 13 '16 at 16:30
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How to get RGB values from UIColor?
I'm creating a color object using the following code.
15 Answers
15
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How can I get a count of the total number of digits in a number?
...w? Hardly. I was egregiously allocating strings back in 2010. What a trend setter. Lol. You are right though. This is dirty!
– Andiih
Dec 10 '16 at 12:42
3
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Make an existing Git branch track a remote branch?
... type longer commands, these are equivalent to the above two:
git branch --set-upstream-to=upstream/foo
git branch --set-upstream-to=upstream/foo foo
As of Git 1.7.0 (before 1.8.0):
git branch --set-upstream foo upstream/foo
Notes:
All of the above commands will cause local branch foo to track r...
ssh: The authenticity of host 'hostname' can't be established
...
Depending on your ssh client, you can set the StrictHostKeyChecking option to no on the command line, and/or send the key to a null known_hosts file. You can also set these options in your config file, either for all hosts or for a given set of IP addresses or ho...
Is there a command to refresh environment variables from the command prompt in Windows?
...ironment variables, so this is a combined solution.
Create a file named resetvars.vbs containing this code, and save it on the path:
Set oShell = WScript.CreateObject("WScript.Shell")
filename = oShell.ExpandEnvironmentStrings("%TEMP%\resetvars.bat")
Set objFileSystem = CreateObject("Scripting.f...
Window.open and pass parameters by post method
...;
document.getElementById('TheForm').submit();
</script>
Edit:
To set the values in the form dynamically, you can do like this:
function openWindowWithPost(something, additional, misc) {
var f = document.getElementById('TheForm');
f.something.value = something;
f.more.value = additio...