Useful tips for everyday
What is vDSO in kernel? vDSO (virtual dynamic shared object) is a kernel mechanism for exporting a carefully selected set of kernel space routines to…
Can you run Apex code under another user? The runAs method doesn’t enforce user permissions or field-level permissions, only record sharing. You can use runAs…
What is preorder sequence in binary tree? The first item in the preorder sequence 15 becomes the root node. Since 20 is the first key…
How to catch an error in a Linux shell script? (Edited to use the more invulnerable printf instead of the problematic echo that might act…
What is identification of components? Specify identification information for the component, including the name, title and description of the component. You can create items of…
What field type can be used in the where clause to improve SOQL query performance? What field type can be used in the WHERE clause…
How to add additional language support in CentOS / RHEL? To add specific language support in CentOS/RHEL, you need firstly confirm the correct language group…
How do you fix duplicate key value violates unique constraint? Suppress “duplicate key value violates unique constraint” errors Suppress the log, either by suppressing all…
How does the school system work in Italy? Education in Italy is compulsory from 6 to 16 years of age, and is divided into five…
Is Android automatically encrypted? As mentioned, most new Android smartphones have device encryption turned on automatically. A big change that was introduced a couple of…