Something related to an assignment operation, i.e. the process of changing the content of a variable to reflect some given value.
Questions tagged [assign]
1695 questions
16
votes
1 answer
Assigning values in Verilog: difference between assign, <= and =
I have just started learning Verilog and I've seen these three lines from different sources. I am confused about the difference between the three:
c <= a&b;
assign c = ~a;
c = 1'b0;
These lines seem to assign a value to c but what's the…
dringx
- 163
- 1
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16
votes
3 answers
Assign a column of a data.frame with string name in R
I am trying to assign data to an existing dataframe with a name generated in a loop. A basic example might be
A = data.frame(a = c(1,2,3), b=c(3,6,2))
for (i in 1:2){
name = paste("Name",i, sep="")
assign(name, c(6,3,2))
}
Now I just need…
mmann1123
- 5,031
- 7
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- 49
15
votes
2 answers
Can't assign this in constructor
I'm trying to merge the props from values into this.
The following throws an error. How can I do this?
this = {...this, ...values}
ThomasReggi
- 55,053
- 85
- 237
- 424
15
votes
1 answer
STL - assignment operator vs. `assign` member function
vector (as well as list and other containers) has a member function (MF) assign.
I want to compare the assign MF (range version) vs. the assignment operator.
As far as I understand it is useful to use assign when:
One wants to assign a sub-range of…
YAKOVM
- 9,805
- 31
- 116
- 217
14
votes
4 answers
Why doesn't assign() values to a list element work in R?
I'm trying to use assign values in an object in a list. What I want to do is change some elements. For example:
x <- list()
x$test <- 1
assign("x$test", 2)
x$test == 1
[1] TRUE
Any thoughts? I need to use assign because I am building a…
mike
- 22,931
- 31
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- 100
14
votes
2 answers
How can I set the text widget contents to the value of a variable in Python/Tkinter?
I am writing a program to assist with a trivial part of my job that can be automated. My purpose here is to:
Copy and paste a chunk of plain text into a Tkinter text widget
Use that pasted chunk of text as the value of a variable so that the…
Jaiden DeChon
- 353
- 1
- 3
- 13
14
votes
6 answers
In C, why can't I assign a string to a char array after it's declared?
This has been bugging me for a while.
struct person {
char name[15];
int age;
};
struct person me;
me.name = "nikol";
when I compile I get this error:
error: incompatible types when assigning to type ‘char[15]’ from type ‘char *’
am…
Kok Nikol
- 307
- 1
- 3
- 9
13
votes
4 answers
Is there an immutable version of Object.assign?
I want to mix two objects in JavaScript:
let a = {x: 1, y: 2, z:3};
let b = {x:10, y: 20};
let c = Object.assign(a, b);
This gives the correct value for c:
Object { x: 10, y: 20, z: 3 }
But now a has been modified too!
Object { x: 10, y: 20, z:…
sdgfsdh
- 33,689
- 26
- 132
- 245
13
votes
1 answer
Why does `mylist[:] = reversed(mylist)` work?
The following reverses a list "in-place" and works in Python 2 and 3:
>>> mylist = [1, 2, 3, 4, 5]
>>> mylist[:] = reversed(mylist)
>>> mylist
[5, 4, 3, 2, 1]
Why/how? Since reversed gives me an iterator and doesn't copy the list beforehand, and…
Stefan Pochmann
- 27,593
- 8
- 44
- 107
12
votes
2 answers
Assign Value to Diagonal Entries of Matrix
I need to access and assign single slots of an m*n matrix inside a for loop. The code so far:
rowCount <- 9
similMatrix = matrix(nrow = rowCount - 1, ncol = rowCount)
show(similMatrix)
for(i in (rowCount - 1)){
for (j in rowCount)
if (i ==…
DI MI
- 245
- 2
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- 16
11
votes
1 answer
Re-assign unique values - pandas DataFrame
I am trying to assign unique values in pandas df to specific individuals.
For the df below, [Area] and [Place] will together make up unique values that are various jobs. These values will be assigned to individuals with the overall aim to use the…
user9394674
11
votes
1 answer
Assign (or copy) column classes from a dataframe to another
I produced a large data frame (1700+obs,159 variables) with a function that collects info from a website. Usually, the function finds numeric values for some columns, and thus they're numeric. Sometimes, however, it finds some text, and converts the…
PavoDive
- 6,322
- 2
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- 55
10
votes
3 answers
How to assign xml content to a string explicitly
Do you know how I can explicitlyt assign xml content to a string ?
Example :
string myXml = "
Tove
Jani
Reminder
Don't forget me this weekend!
"
I want to…
mathinvalidnik
- 1,566
- 10
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- 57
9
votes
1 answer
How do I handle/circumvent "Cannot assign to ... which is behind a & reference" in Rust?
I'd implementing a simple linked list. This is the (working) code I had so far:
pub struct LinkedList {
start: Option>>,
}
impl LinkedList {
pub fn new() -> LinkedList {
return LinkedList { start: None };
…
Islion
- 111
- 1
- 6
9
votes
1 answer
different results for standard form and functional form of data.table assigne-by-reference `:=`
There seems to be a minor difference between data.tabel's assignment by reference := in the standard to the functinal form.
Standard form coerces RHS to vector, the functional form does not.
A detail, but not documented as I…
rluech
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