Remove line spaces

Question

How can I remove the line spaces but without remove the structure of the next string.

    P0:::inicial
    P1:::pregunta
    P2:::pregunta
    P3:::pregunta
    R1:::respuesta
    R2:::respuesta
    R3:::respuesta
    R4:::respuesta
    R5:::respuesta
    R6:::respuesta
    R7:::respuesta
    R8:::respuesta
    R9:::respuesta
    C1:::cotizacion
    C2:::cotizacion
    C3:::cotizacion
    A1:::agregar
    A2:::agregar
                         <------ I want delete this spaces.
    C4:::cotizacion

I try using regex but I have problems when the regex and replace remove all the spaces on my string but I only want delete the spaces without information.

In try some like this:

replace(/[\r\n]+/g, " ");

/^\s*$(?:\r\n?|\n)/gm try with this. – Netzach Mar 02 '20 at 19:59 — Netzach, Mar 02 '20 at 19:59

score 1 · Accepted Answer · answered Mar 02 '20 at 20:07

1

You may use this regex with anchor and MULTILINE flag:

.replace(/^[ \t]*[\r\n]+/gm, "")

RegEx Demo

MULTILINE or m mode makes ^ match start of each line.
^: matches start of a line
[ \t]*: Match 0 or more spaces or tabs
[\r\n]+: Match 1+ line break characters \r or \n

answered Mar 02 '20 at 20:07

anubhava

761,203
64
569
643

Isn't `\s` the preferred Regular expression for Space? – Roko C. Buljan Mar 02 '20 at 20:09
`\s` also matches new lines not just horizontal spaces. – anubhava Mar 02 '20 at 20:10
So yeah, `/^[\s]*[\r\n]+/m` That's what I thought, also the `g` is not necessary since the CR and the LF... – Roko C. Buljan Mar 02 '20 at 20:13
`g` is required if there are more blank lines like this in input. Also `^[ \t]*[\r\n]+` is more efficient than `^[\s\t]*[\r\n]+` because `\s` matches all kind of spaces. In fact `[\s\t]` can be changed to just `\s` – anubhava Mar 02 '20 at 20:16
1

@anubhava yes, I forgot to remove the `\t` (done now ;)) – Roko C. Buljan Mar 02 '20 at 20:18

Remove line spaces

1 Answers1