Halifax Rack and Screw is a world leader in the manufacture and supply of high quality precision engineered gear rack, pinions, lead screws and nuts.
More than 60 years’ experience machining quality products.
Gear rack manufactured with tip relief and “Stub Tooth or Semi Topped” tooth profiles for smoother and quieter running.
Spur & helical tooth forms up to 45 degree helix and 14½, 20 and 25 degree pressure angles.
Quick delivery worldwide on many parts.
Volume and prototype quantities to meet the customers needs.
Large machining capacity allows for manufacture of longer gear racks and screws.
Parts warehoused in the USA for shorter deliveries.
I went with this in the end as it is recommended by a i3 maintainer in [a Reddit post](https://www.reddit.com/r/i3wm/comments/3o2bdn/i3_how_to_quickly_switch_between_current_and/).
You have to install `i3ipc` in your global Python for this first (`pip3 install i3ipc`). Then add a startup script that runs:
```
/usr/bin/python3 ~/.config/i3/focus-last.py
```
And add this to `i3/config`:
```
bindsym $mod+Tab exec "/usr/bin/python3 ~/.config/i3/focus-last.py --switch"
```
International Journal of Advances in Biology (IJAB) is a peer-reviewed, open access journal, addresses the impacts and challenges of Biology. The journal documents practical and theoretical results which make a fundamental contribution for the development of Biological sciences and applications.
List<Predicate> predicates = new ArrayList<Predicate>();
//Adding predicates in case of parameter not being null
if (param1 != null) {
predicates.add(
qb.equal(customer.get("someAttribute"), param1));
}
if (paramNull != null) {
predicates.add(
qb.equal(customer.get("someOtherAttribute"), paramNull));
}
//query itself
cq.select(customer)
.where(predicates.toArray(new Predicate[]{}));