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How to write to an existing excel file without overwriting data (using pandas)?
... if truncate_sheet and sheet_name in writer.book.sheetnames:
# index of [sheet_name] sheet
idx = writer.book.sheetnames.index(sheet_name)
# remove [sheet_name]
writer.book.remove(writer.book.worksheets[idx])
# create an empty sheet [sheet_n...
Implode an array with JavaScript?
...ore the imploded array):
var tmp = "";
$.each(output_saved_json, function(index,value) {
tmp = tmp + output_saved_json[index] + ";";
});
output_saved_json = tmp.substring(0,tmp.length - 1); // remove last ";" added
I have used substring to remove last ";" added at the final without necessity...
Having issue with multiple controllers of the same name in my project
...n}/{id}", // URL with parameters
new { controller = "Home", action = "Index", id = UrlParameter.Optional }, // Parameter defaults
new string[] { "MyCompany.MyProject.WebMvc.Controllers"}
);
This will make http://server/ go to your HomeController's Index action which is, I think, what you...
Iteration over std::vector: unsigned vs signed index variable
...ou should prefer iterators. Some people tell you to use std::size_t as the index variable type. However, that is not portable. Always use the size_type typedef of the container (While you could get away with only a conversion in the forward iterating case, it could actually go wrong all the way in t...
Does Java SE 8 have Pairs or Tuples?
...round with lazy functional operations in Java SE 8, and I want to map an index i to a pair / tuple (i, value[i]) , then filter based on the second value[i] element, and finally output just the indices.
...
Why is using “for…in” for array iteration a bad idea?
...y.
for (var i = 0; i < a.length; i++) {
// Iterate over numeric indexes from 0 to 5, as everyone expects.
console.log(a[i]);
}
/* Will display:
undefined
undefined
undefined
undefined
undefined
5
*/
can sometimes be totally different from the other...
Inverse dictionary lookup in Python
...
python has a .index method on lists the returns the first found index with the specified value or an exception if not found... any reason why such a semantic could not be applied to dictionaries?
– Brian Jack
...
Performance of Arrays vs. Lists
... bit of micro-optimisation; arrays can be marginally faster if you use the indexer / for form - but IIRC believe it depends on the type of data in the array. But unless you need to micro-optimise, keep it simple and use List<T> etc.
Of course, this only applies if you are reading all of the d...
binning data in python with scipy/numpy
...
The numpy_indexed package (disclaimer: I am its author) contains functionality to efficiently perform operations of this type:
import numpy_indexed as npi
print(npi.group_by(np.digitize(data, bins)).mean(data))
This is essentially t...
How to sort a list/tuple of lists/tuples by the element at a given index?
...s tup, or t, or whatever you like and it'll still work. tup here specifies index of the list's tuple, so 1 means that sorting will be performed by the second values of tuples from the original list (2, 5, 8).
– Neurotransmitter
Jul 26 '16 at 15:13
...