I'm looking for a function to dump variables and objects, with human readable explanations of their data types. For instance, in php var_dump
does this.
$foo = array();
$foo[] = 1;
$foo['moo'] = 2;
var_dump($foo);
Yields:
array(2) {
[0]=>
int(1)
["moo"]=>
int(2)
}
The var_dump() function dumps information about one or more variables. The information holds type and value of the variable(s).
var_dump() displays values along with data types as output. print_r() displays only value as output. It does not have any return type. It will return a value that is in string format.
The var_dump equivalent in JavaScript? Simply, there isn't one. Prints an interactive listing of all properties of the object.
The var_dump function displays structured information about variables/expressions including its type and value. Arrays are explored recursively with values indented to show structure.
A few examples:
foo <- data.frame(1:12,12:1)
foo ## What's inside?
dput(foo) ## Details on the structure, names, and class
str(foo) ## Gives you a quick look at the variable structure
Output on screen:
foo <- data.frame(1:12,12:1)
foo
X1.12 X12.1
1 1 12
2 2 11
3 3 10
4 4 9
5 5 8
6 6 7
7 7 6
8 8 5
9 9 4
10 10 3
11 11 2
12 12 1
> dput(foo)
structure(list(X1.12 = 1:12, X12.1 = c(12L, 11L, 10L, 9L, 8L,
7L, 6L, 5L, 4L, 3L, 2L, 1L)), .Names = c("X1.12", "X12.1"), row.names = c(NA,
-12L), class = "data.frame")
> str(foo)
'data.frame': 12 obs. of 2 variables:
$ X1.12: int 1 2 3 4 5 6 7 8 9 10 ...
$ X12.1: int 12 11 10 9 8 7 6 5 4 3 ...
Check out the dump
command:
> x <- c(8,6,7,5,3,0,9)
> dump("x", "")
x <-
c(8, 6, 7, 5, 3, 0, 9)
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