How to replace an empty entry with zero in a delimited string

awk replace empty field
awk replace empty column
sed replace empty string
sed replace null with blank
awk if field is empty
how to replace particular column value in unix
sed replace whitespace with comma
sed command

It is as simple as follows:

public class Demo {   
    public static void main(String[] args) {
        String str=";;7.52;;;;;;2.89;3.05;2.48;";
        while(str.contains(";;"))
            str=str.replaceAll(";;", ";0;");            
        System.out.println(str);
    }
}

Output:

;0;7.52;0;0;0;0;0;2.89;3.05;2.48;

How to replace empty position with a 0 value when converting string , Empty; foreach(char c in input) { if(c == ',' && String. The regex will insert zeros into the original string in spots when two commas are other, or when a comma is detected at the beginning or at the end of the string (demo). Hello, I want to reaplace empty values to zero. As you could see the attached file, there are many days with no record. I want to darh the line chart setting zero when specific date has no record. I've searched and tried do something with "properties->data->limit.. ->expression" but I failed. Thanks,Hello, I want to reaplace empty values to zero.


shortest one:

String line = ";;7.52;;;;;;2.89;3.05;2.48;";
String newLine = line.replace(";;", ";0;")
                     .replace(";;", ";0;")
                     .replace(";;", ";");

Replacing missing value blank space with zero, Setting FS and OFS to tab ensures the output is correctly delimited. The for-loop looks at every field and sets it to zero if it is empty. The one at the end is a  If the value in your original formula is blank, the original formula would (without the if-formula according to number 3) return 0. Using option 3 changes it to blank again. You can easily try it by just using a cell reference, for example writing =B1 in cell A1. If you leave B1 blank, A1 would show 0. Using the option 3 would show a blank cell A1.


Convert the string into an character array, create a arraylist of characters and add each character into the arraylist. if a two adjacent characters are ; then add 0. Then use Streams to convert the arraylist into a string.

        String s = ";;7.52;;;;;;2.89;3.05;2.48;";
        char arr[] = s.toCharArray();
        ArrayList<Character> list = new ArrayList<>();
        for(int i = 0; i < arr.length-1; i++) {
            list.add(arr[i]);
            if ( arr[i]==';' && arr[i+1]==';') {
                list.add('0');
            }
        }
        String newStr = list.stream()
                            .map(String::valueOf)
                            .collect(Collectors.joining()); 

Note: Don't forget to import Collectors (import java.util.stream.Collectors;).

explode - Manual, If the limit parameter is zero, then this is treated as 1. Note: If delimiter is an empty string (""), explode() will return FALSE . If you split an empty string, you get back a one-element array with 0 as the key and an empty string for the value. I needed a multiexplode which didn't replace my delimiters for 1 other delimiter. Hello. I need to convert a a string column to integer. Before converting, I need to check if it has blank values then convert it to NULL. Someone told me that its easier to convert it to NULL before converting to integer.


Try using this method:

    int countOf(String s, char c) {
        int ct, i, j;
        char _c;

        for (ct = i = 0, j = s.length(); i < j; i++) {
            _c = s.charAt(i);
            ct += (_c == c) ? 1 : 0;
        }

        return ct;
    }

to count the number of semicolons in your string.

Managing the delimiter character is the key to solving the problem.

4.8. String functions - Chapter 4. Functions, Functions taking a string as input all operate on Unicode characters rather than on a replace() returns a string in which all occurrences of a specified string in the from the splitting of the original string around matches of the given delimiter​. start uses a zero-based index. If length is 0 , the empty string will be returned. Empty cells should already be NaNs. If the cells contain empty strings, df.replace(“”, numpy.nan, inplace=True) should do it.


String.Join Method (System), Concatenates all the elements of a string array, using the specified separator between Empty if values has zero elements or all the elements of values are null . If the first element of values is null , the Join(String, Object[]) method does not  The advantage of this method compared to IsNullOrEmpty is that IsNullOrWhiteSpace will check for ALL THREE conditions we’ve discussed so far (null, empty string, or a string consisting of white space). So if you indeed want to check for all three of these cases, you can do so with one test:


Split string or character vector at specified delimiter, in C is empty. This empty character vector follows the last matched delimiter. Input text, specified as a character vector or a string scalar. Data Types: char |  In this article, we use a subset of these and learn different ways to replace null values with an empty string, constant value and zero(0) on Spark Dataframe columns integer, string, array and map with Scala examples. Replace null values with zero (0) Replace null values with empty String; Replace null on List and map


StrSplit() / StringSplit, The StrSplit function and StringSplit command separate a string into an array of If this parameter is blank or omitted, each character of the input string will be If non-zero, the string is split a maximum of MaxParts-1 times and the To use a string as a delimiter rather than a character, first use StringReplace to replace all​  Search and replace String.vi has both modes. Selected by right-click on it. Take a look at the attached example comparing behaviour of Search and replace String with Search and replace pattern. Both claim to have regular expression inputs (if so selected, at least in LV8), but result differs for regular expression = [\\s\\t] (in \code display