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Python __str__ and lists
In Java, if I call List.toString(), it will automatically call the toString() method on each object inside the List. For example, if my list contains objects o1, o2, and o3, list.toString() would look something like this:
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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
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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...
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...
Deleting elements from std::set while iterating
I need to go through a set and remove elements that meet a predefined criteria.
8 Answers
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What is Data Transfer Object?
...ue however that this is ok if it's semantically correct (say if you pass a settings class with properties rather than the properties themselves as values). What you shouldn't do is throw in all the arguments for the sake of passing a single object, since they may very well be unrelated and cause nig...
What are the mathematical/computational principles behind this game?
... is exactly one card that has both of them, the OP can tell us if the game set satisfies it.
– ypercubeᵀᴹ
Jun 5 '11 at 8:10
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Why do people say there is modulo bias when using a random number generator?
...o Bias is the inherent bias in using modulo arithmetic to reduce an output set to a subset of the input set. In general, a bias exists whenever the mapping between the input and output set is not equally distributed, as in the case of using modulo arithmetic when the size of the output set is not a ...
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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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...