I’m observing some weird behavior when using set -e (errexit), set -u (nounset) along with ERR and EXIT traps. They seem related, so putting them into one question seems reasonable. 1) set -u does not trigger ERR traps Code: #!/bin/bash trap ‘echo “ERR (rc: $?)”‘ ERR set -u echo ${UNSET_VAR} Expected: ERR trap gets called, … Read more
I’m trying to create some error reporting using a Trap to call a function on all errors: Trap “_func” ERR Is it possible to get what line the ERR signal was sent from? The shell is bash. If I do that, I can read and report what command was used and log/perform some actions. Or … Read more
For example, #!/bin/bash while : do sl done How to terminate this bash script? Answer press Ctrl-Z to suspend the script kill %% The %% tells the bash built-in kill that you want to send a signal (SIGTERM by default) to the most recently suspended background job in the current shell, not to a process-id. … Read more
Many examples for trap use trap … INT TERM EXIT for cleanup tasks. But is it really necessary to list all the three sigspecs? The manual says: If a SIGNAL_SPEC is EXIT (0) ARG is executed on exit from the shell. which I believe applies whether the script finished normally or it finished because it … Read more
We are working on a CSS framework for our app, having made the prototype with Twitter Bootstrap and we started by designing the elements of Bootstrap we had used. One of them was prepended and appended inputs Which is basically something that helps you recognize what the input is used for, it’s not necessarily a … Read more
I’m using Bootstrap 4 for my websites layout, and recently wanted to create a nested Table of Content. Considering https://graphicdesign.stackexchange.com/help/on-topic, I’d say this is about the look & feel aspect of web design; A nested table of content is basically a table of content with topics, subtopics, subsubtopics etc… So, here are my two concepts, … Read more
Is it just me, or does the text on the Bootstrap buttons hard to read: I feel that the text is way too small for the size of the button and the letters are too close to each other, making them blend together. Is this just me? Are there general principles for choosing fonts and … Read more
Currently designing in Adobe XD me and my team were discussing about the perfect approach to grid systems. How in You opinion should we handle the number of columns for mobile devices? 1. Go the standard way and get rid of some columns: desktop – 12 columns tablets – 8 columns phones – 4 columns … Read more
The Grid System of the popular Bootstrap Framework creates column grid where the gap in the middle between columns is twice as large as the edge margins: http://jsbin.com/baxunex/edit?html,css,output Is there any reasons for this unequal spacing (as opposed to making all gaps of equal size)? Are there known design principles supporting this decision? Answer Bootstrap … Read more
Sorry if this is a really stupid question or something really easy, I’m just a backend developer who has no talent with design. I’m actually programming a Dynamic Library for jailbroken iOS devices that allows you to create multiple enviroments. I would like to create an icon like this one apple made for the Siri … Read more
