Java Script: How to Replace the multiple strings based on conditions

Question

Below string is in the format of name and value (' name' - 'value';). How to remove the occurrence of value '0 bytes' along with its name and remove the name '/platform/sun4v/lib/sparcv9/libc_psr.so.1' along with its value.

/devices - 0 bytes; /system/object - 0 bytes; /etc/dfs/sharetab - 0 bytes; /dev/fd - 0 bytes; /var/run - 13.77 GiB; /platform/sun4v/lib/sparcv9/libc_psr.so.1 - 27.24 GiB; / - 27.24 GiB; /var - 26.84 GiB; /proc - 0 bytes; /system/contract - 0 bytes; /rpool - 18.04 GiB; /mnt - 157.67 TiB; /vol - 0 bytes; /was8 - 48.26 GiB; /platform/sun4v/lib/libc_psr.so.1 - 27.24 GiB; /etc/svc/volatile - 13.77 GiB; /etc/mnttab - 0 bytes; /tmp - 13.82 GiB;

hello_world · Accepted Answer · 2016-11-16 11:49:11Z

Split the string on a selicolon and filter the array based on your criteria, then join the array to add back the semicolons and convert back to one string:

var str = '/devices - 0 bytes; /system/object - 0 bytes; /etc/dfs/sharetab - 0 bytes; /dev/fd - 0 bytes; /var/run - 13.77 GiB; /platform/sun4v/lib/sparcv9/libc_psr.so.1 - 27.24 GiB; / - 27.24 GiB; /var - 26.84 GiB; /proc - 0 bytes; /system/contract - 0 bytes; /rpool - 18.04 GiB; /mnt - 157.67 TiB; /vol - 0 bytes; /was8 - 48.26 GiB; /platform/sun4v/lib/libc_psr.so.1 - 27.24 GiB; /etc/svc/volatile - 13.77 GiB; /etc/mnttab - 0 bytes; /tmp - 13.82 GiB;'

var splitStr = str.split(';');
var newStr = splitStr.filter(function(item){
         var itemSplit = item.split('-');

         return !(itemSplit != '' && (itemSplit[0].trim() ===  '/platform/sun4v/lib/sparcv9/libc_psr.so.1'  || itemSplit[1].trim() ==='0 bytes'));
}).join(';');

//newStr is will contain the filtered string
console.log(newStr);

Lewis · Accepted Answer · 2016-11-16 11:58:34Z

1

Try this.

str.split(';').filter(item =>  !item.includes('0 bytes') && !item.includes('/platform/sun4v/lib/sparcv9/libc_psr.so.1')).join(';')

answered Nov 16, 2016 at 11:58

Lewis

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Comments

Rounin · Accepted Answer · 2016-11-16 12:11:41Z

You can use regular expressions here to transform the string.

See:

The first regex (/\/platform\/sun4v\/lib\/sparcv9\/libc_psr\.so\.1 [^\;]+\;\s/) selects the long, unique substring;
The second regex (/\/[^\-]+- 0 bytes\;\s/g) selects all instances of - 0 bytes (and each instance's preceding label)

var paragraphAfter = document.getElementsByClassName('after')[0];
var textBefore = document.getElementsByClassName('before')[0].textContent;
var textAfter = textBefore.replace(/\/platform\/sun4v\/lib\/sparcv9\/libc_psr\.so\.1 [^\;]+\;\s/,'');
var textAfter = textAfter.replace(/\/[^\-]+- 0 bytes\;\s/g,'');
paragraphAfter.textContent = textAfter;

<h2>Before:</h2>
<p class="before">/devices - 0 bytes; /system/object - 0 bytes; /etc/dfs/sharetab - 0 bytes; /dev/fd - 0 bytes; /var/run - 13.77 GiB; /platform/sun4v/lib/sparcv9/libc_psr.so.1 - 27.24 GiB; /var - 26.84 GiB; /proc - 0 bytes; /system/contract - 0 bytes; /rpool - 18.04 GiB; /mnt - 157.67 TiB; /vol - 0 bytes; /was8 - 48.26 GiB; /platform/sun4v/lib/libc_psr.so.1 - 27.24 GiB; /etc/svc/volatile - 13.77 GiB; /etc/mnttab - 0 bytes; /tmp - 13.82 GiB;</p>

<h2>After:</h2>
<p class="after"></p>

Popsyjunior · Accepted Answer · 2016-11-16 13:09:20Z

I believe you still want your output in the same format. This should work for you:

function formatInfo(data) {
    return data.split(";").filter(function(item,i) {
        if( item.indexOf('0 bytes') >= 0 || item.indexOf('/platform/sun4v/lib/sparcv9/libc_psr.so.1') >= 0 ) {
            return null;
        }
        return item.trim();
    }).join(";").trim();
}

//Usage:

formatInfo('/devices - 0 bytes; /system/object - 0 bytes; /etc/dfs/sharetab - 0 bytes; /dev/fd - 0 bytes; /var/run - 13.77 GiB; /platform/sun4v/lib/sparcv9/libc_psr.so.1 - 27.24 GiB; / - 27.24 GiB; /var - 26.84 GiB; /proc - 0 bytes; /system/contract - 0 bytes; /rpool - 18.04 GiB; /mnt - 157.67 TiB; /vol - 0 bytes; /was8 - 48.26 GiB; /platform/sun4v/lib/libc_psr.so.1 - 27.24 GiB; /etc/svc/volatile - 13.77 GiB; /etc/mnttab - 0 bytes; /tmp - 13.82 GiB;');

//should return:

"/var/run - 13.77 GiB; / - 27.24 GiB; /var - 26.84 GiB; /rpool - 18.04 GiB; /mnt - 157.67 TiB; /was8 - 48.26 GiB; /platform/sun4v/lib/libc_psr.so.1 - 27.24 GiB; /etc/svc/volatile - 13.77 GiB; /tmp - 13.82 GiB"

Cheers..!!

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