Categories
Linux Mastering Development Ubuntu

grep: Show ALL lines before a match

Not only 10, or 7, or 14 for example, as explain in this topic and in many others: https://stackoverflow.com/questions/12444808/how-do-i-fetch-lines-before-after-the-grep-result-in-bash/12444813 How you do it? For example, instead of: … | grep -B 10 — "foo" I want: … | grep -B — "foo" But this last code doesn’t work.

Categories
Development

How to force evaluation of expression in Observer at time Observer is created rather than at time values are emitted

I posted a similar question at this link: enter link description here but didn’t receive any answers (I thought I had an answer but now I’m not so sure) and am still quite confused, so I’d be very grateful for some feedback and guidance. I have a Reactive Form in which it appears the function […]

Categories
Development

How to force evaluation of expression in Observer at time Observer is created rather than at time values are emitted

I posted a similar question at this link: enter link description here but didn’t receive any answers (I thought I had an answer but now I’m not so sure) and am still quite confused, so I’d be very grateful for some feedback and guidance. I have a Reactive Form in which it appears the function […]