When casting Faerie Fire from Ring of Shooting Stars, do you need to maintain concentration? [duplicate]

Ring of Shooting Stars says

Faerie Fire: You can expend 1 charge as an action to cast Faerie Fire from the ring.

Since it says you cast the spell from the ring, I wonder if you need to maintain concentration on the resulting spell. Moreover, is that something particular to Ring of Shooting Stars, or is that how it usually goes with casting spells via items?

Trouble Iterating My Simulated Forest Fire

I’m having some trouble iterating my simulation of a forest fire. I’m new to mathematica, so apologies for poor coding. I’m sure there are far neater and more efficient ways of doing this, but i would like to know whats the problem with the method im using currently if possible.

This is my code to get the adjacent elements, including ‘wrap around’:

neighbourPos[m_, i_, j_] := Transpose[Mod[{i, j} + {{-1, 0, 1, 0}, {0, -1, 0, 1}}, Dimensions[m],]]; 

For the fire, 2s represent burning trees, 1s trees and 0s empty ground. After one timestep, trees adjacent to a fire will set on fire and original fire(s) will burn themselves out and become ‘0s’. This my code to simulate the spread of the fire:

nextState[m_] :=    (firepos = Position[m, 2];    a = MapAt[2 # &, m,      neighbourPos[m, Position[m, 2][[1, 1]], Position[m, 2][[1, 2]]]];    MapAt[0 &, a, firepos]) 

It seems to work. Up to a point anyway. I would like to eventually plot the thing with ListAnimate, however, When i try to iterate nextState until the fire is burnt out with FixedPointList it stops working properly after 6 iterations and i get a load of errors.

e.g

MatrixPlot[mat/2, PlotRange -> {0, 1}, ColorFunction -> "Rainbow", ColorFunctionScaling -> False] 

Gives

Starting matrix

Then

MatrixPlot[nextState[mat]/2, PlotRange -> {0, 1}, ColorFunction -> "Rainbow",  ColorFunctionScaling -> False] 

Matrix after one iteration

But then errors come after more iterations.

In[1]:= fireStates[m_] := FixedPointList[nextState, m];  In[14]:= frames = fireStates[mat];  During evaluation of In[14]:= Part::partw: Part 1 of {} does not exist.  During evaluation of In[14]:= Part::partw: Part 1 of {} does not exist.  During evaluation of In[14]:= MapAt::pkspec1: The expression Mod[1+{}[[1,1]],10,1] cannot be used as a part specification.  During evaluation of In[14]:= Thread::tdlen: Objects of unequal length in Mod[{{0,1,2,1},{1,0,1,2}},{3},1] cannot be combined.  During evaluation of In[14]:= MapAt::psl: Position specification Transpose[Mod[{{0,1,2,1},{1,0,1,2}},{3},1]] in MapAt[2 #1&,MapAt[2 #1&,<<1>>,{{Mod[-1+{}[[1,1]],10,1],Mod[{}[[1,2]],10,1]},{<<1>>,Mod[<<1>>]},<<1>>,{Mod[{}[[1,1]],10,1],Mod[1+{}[[1,2]],10,1]}}],Transpose[Mod[{{0,1,2,1},{1,0,1,2}},{3},1]]] is not a machine-sized integer or a list of machine-sized integers.  During evaluation of In[14]:= MapAt::partw: Part {3,4,2,1,2,3} of MapAt[2 #1&,MapAt[2 #1&,<<1>>,{{Mod[-1+{}[[1,1]],10,1],Mod[{}[[1,2]],10,1]},{<<1>>,Mod[<<1>>]},<<1>>,{Mod[{}[[1,1]],10,1],Mod[1+{}[[1,2]],10,1]}}],Transpose[Mod[{{0,1,2,1},{1,0,1,2}},{3},1]]] does not exist.  During evaluation of In[14]:= Thread::tdlen: Objects of unequal length in Mod[{{1,2,3,2},{1,0,1,2}},{3},1] cannot be combined.  During evaluation of In[14]:= MapAt::psl: Position specification Transpose[Mod[{{1,2,3,2},{1,0,1,2}},{3},1]] in MapAt[2 #1&,MapAt[0&,MapAt[2 #1&,MapAt[<<1>>],Transpose[Mod[<<1>>]]],{{1,1,1},{3,1,2,1,3},{3,2,2,1,2,3},{3,3,2,1,3},{3,4,2,1,2,3}}],Transpose[Mod[{{1,2,3,2},{1,0,1,2}},{3},1]]] is not a machine-sized integer or a list of machine-sized integers.  During evaluation of In[14]:= MapAt::partw: Part {2,2,3,4,2,1,2,3} of MapAt[2 #1&,MapAt[0&,MapAt[2 #1&,MapAt[<<1>>],Transpose[Mod[<<1>>]]],{{1,1,1},{3,1,2,1,3},{3,2,2,1,2,3},{3,3,2,1,3},{3,4,2,1,2,3}}],Transpose[Mod[{{1,2,3,2},{1,0,1,2}},{3},1]]] does not exist.  During evaluation of In[14]:= Thread::tdlen: Objects of unequal length in Mod[{{1,2,3,2},{1,0,1,2}},{3},1] cannot be combined.  During evaluation of In[14]:= General::stop: Further output of Thread::tdlen will be suppressed during this calculation.  During evaluation of In[14]:= MapAt::psl: Position specification Transpose[Mod[{{1,2,3,2},{1,0,1,2}},{3},1]] in MapAt[2 #1&,MapAt[0&,MapAt[<<1>>],{{2,1,1,1},{2,2,1,1,1},{2,2,3,1,2,1,3},{2,2,3,2,2,1,2,3},<<3>>,{2,3,1,1,2,4},{3,2,3},{3,3,2},<<5>>}],Transpose[Mod[{{1,2,3,2},{1,0,1,2}},{3},1]]] is not a machine-sized integer or a list of machine-sized integers.  During evaluation of In[14]:= General::stop: Further output of MapAt::psl will be suppressed during this calculation.  During evaluation of In[14]:= MapAt::partw: Part {2,2,2,2,3,4,2,1,2,3} of MapAt[2 #1&,MapAt[0&,MapAt[<<1>>],{{2,1,1,1},{2,2,1,1,1},{2,2,3,1,2,1,3},{2,2,3,2,2,1,2,3},<<3>>,{2,3,1,1,2,4},{3,2,3},{3,3,2},<<5>>}],Transpose[Mod[{{1,2,3,2},{1,0,1,2}},{3},1]]] does not exist.  During evaluation of In[14]:= General::stop: Further output of MapAt::partw will be suppressed during this calculation. 

Many many thanks in advance for anyone kind enough to help.

Cheers.

Google Tag Assistant Difficult to fire checkout-tag + What do the words under Summary represent?

I wanted to fire my Facebook Pixel for Initiate Checkouts, however I noticed that I have 2 checkouts that are being loaded with exactly the same variables and data layer. This causes the Pixel to fire twice which I do not want. I don’t really know how you can call the words below summary and what it exactly refers to (I think it is parts of the website that is being loaded) but here is a picture:

enter image description here

So my questions are:

  1. What exactly are checkoutOption, Window Loaded, DOM Ready, checkout, etc.?
  2. Is there a possibility to change or remove them completely? (In my case I would like to remove the double checkout)
  3. What is the best way for me to fire the pixel only once?

Does the reach increase of the Eldritch Claw tattoo stack with Fangs of the Fire Snake?

The Eldritch Claw tattoo released in Tasha’s Cauldron of Everything includes the Eldritch Maul ability which grants the following benefit:

For the duration, each of your melee attacks with a weapon or an unarmed strike can reach a target up to 15 feet away from you, as inky tendrils launch toward the target.

The Fangs of the Fire Snake elemental discipline also grants the following benefit:

Your reach with your unarmed strikes increases by 10 feet for that action, as well as the rest of the turn.

After activating Eldritch Maul and using Fangs of the Fire Snake what is the reach of my unarmed strikes? Would it be 25 feet or would it be 15 ft?

Does fire shield damage trigger if cloud rune is used

If a wizard cast fire shield and is later hit by a melee attack, then a fighter uses cloud rune to switch targets. Would the fire shield still do damage?

Fire Shield Whenever a creature within 5 feet of you hits you with a melee attack, the shield erupts with flame. The attacker takes 2d8 fire damage from a warm shield, or 2d8 cold damage from a cold shield.

Cloud Rune When you or a creature you can see within 30 feet of you is hit by an attack roll, you can use your reaction to invoke the rune and choose a different creature within 30 feet of you, other than the attacker. The chosen creature becomes the target of the attack, using the same roll. This magic can transfer the attack’s effects regardless of the attack’s range.

Should a Bugbear PC take damage when holding an enemy on the other side of a Wall of Fire with Grapple?

Bugbears have long arms, allowing them to grapple enemies 10 ft. away.

The Bugbear’s square is not in the effect range of the Wall of Fire. However, about 5 ft. worth of one of the Bugbear’s hands is supposedly in a square that is.

Mechanically, should the Bugbear take damage? If so, simulationally, how do we reconcile that such a small fraction of the player being in the square and taking just as much damage as a character residing fully in the area of effect?

Does Wall of Fire hurt people inside a Leomund’s Tiny Hut?

Leomund’s Tiny Hut says

Creatures and objects⁠ within the dome when you cast this spell can move through it freely. All other creatures and objects⁠ are barred from passing through it. Spells and other magical Effects can’t extend through the dome or be cast through it. The Atmosphere inside the space is comfortable and dry, regardless of the weather outside.

Wall of Fire says

When the wall appears, each creature within its area must make a Dexterity saving throw. On a failed save, a creature takes 5d8 fire damage, or half as much damage on a successful save. One side of the wall, selected by you when you cast this spell, deals 5d8 fire damage to each creature that ends its turn within 10 feet of that side or inside the wall. A creature takes the same damage when it enters the wall for the first time on a turn or ends its turn there. The other side of the wall deals no damage.

Does Tiny Hut negate the magical heat or Wall of Fire cook the adventurer?