Advertisements function _each(list, iter){ for(var i=0; i<list.length; i++){ iter(list[i]); } } this is code for list circuit var slice = Array.prototype.slice; function _rest(list, num){ return slice.call(list, num || 1); } I want to apply this to not only array but array-like object. So I use slice.call function _reduce(list, iter, memo){ if(arguments.length == 2){ memo =… Read More In "_reduce" function i made, spliced array is allocated to original array, but is not changed, why?

Advertisements Trying to mutate a slice of an array, adding a constant to elements with odd indices. But this must be a copy, not the original array which is assigned, since this doesn’t change the array: times = np.arange(10) times[1::2] = times[1::2] + 0.5 It’s curious since this works: times[1::2] = -1 Why is the… Read More Adding a constant to a slice of array

Advertisements I need to create a script where I take a list of phone numbers, and be able to search through those phone numbers by using their area code. The only requirement is that I have to use slice. Any help would be appreciated! phone_numbers = ["+1 709 239 5000", "+49 151 123 456", "+64… Read More how to add country codes to a list from a list of phone numbers in python

Advertisements So here’s an example string: CN=John Doe,OU=IT,OU=Management Support Services,OU=Divisions,OU=Accounts,DC=company,DC=com I only need to get the first name out of this string. In this case the name being John Doe. I can’t hard code a number of characters in as the names there can vary in length. Basically I need to select the string after… Read More Can I separate a string using a a number as the starting point and a comma as the ending point?

Advertisements I am trying to parse a []bytes into []int32; but I am getting a blank reply, see this go playground. code: import ( "bytes" "encoding/binary" "fmt" ) func main() { someBytes := []byte{0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00} someInts := make([]int32, 0) r :=… Read More golang parsing []bytes to []int32 returns blank

Advertisements I have a large dataset with 200.000+ rows. I want to group it by two columns, filter based on another column, while keeping all the other columns. Sample looks like this: hv001 hv002 hv101 hv104 hv105 1 1 1 1 1 35 2 1 1 2 2 22 3 1 1 3 2 2… Read More How to use slice in data.table in R

Advertisements Assume I have the dataframe df and I want to slice this in multiple dataframes and store each in a list (list_of_dfs). Each sub-dataframe should only contain the rows "Result". One sub-dataframe starts, when in column "Point" the value "P1" and in column "X_Y" the value "X" is given. I tried this with first… Read More Slice Dataframe in sub-dataframes when specific string in column is found

Advertisements I have a Pandas dataframe with the column store. It contains a list of stores that look like this: H-E-B 721:1101 W STAN SCHLUETER LOOP,KILLEEN,TX H-E-B PLUS 39:2509 N MAIN ST,BELTON,TX I want the store number, which are 721 and 39 in the above examples. Here is my process for getting it: Find the… Read More Regular expression in Pandas: Get substring between a space and a colon

Advertisements I want to rotate a word to the right, so that every letter has passed. What I tried to do is make a function. It looks like this (yeah yeah ik lmao): word = "Abobus"; length = len(word); n = 1; def rotation(): for i in range(length + 1): c = word[0 : length-n]… Read More How do I rotate a string to the right until every letter has been rotated?