How to copy files using a batch file?
How do I copy files using Windows Batch?
Does anyone know of any interesting subsets of the Cantor set? When I first started thinking about this, I thought that since the Cantor set $C$ is the intersection of disjoint unions of closed sets, those particular closed sets would be subsets of $C$. Those sets, however, happen to be intervals! The Cantor set contains no isolated points nor (open) intervals, so then what subsets does it contain besides $\varnothing$ and itself? How to delete (invalid) files with colon in their name under Windows? I found Minecraft's marvelous large worlds extremely slow to navigate, even with a quad core and meaty graphics card.  I assume Minecraft's slowness comes from:   Java, as spatial partitioning and memory management are faster in native C++. Weak world partitioning.   I could be wrong on both assumptions. However, this got me thinking about the best way to manage large voxel worlds. As it is a true 3D world, where a block can exist in any part of the world, it is basically a big 3D array [x][y][z], where each block in the world has a type (i.e BlockType.Empty = 0, BlockType.Dirt = 1, etc.)  I assume that to make this sort of world perform well, you would need to:   Use a tree of some variety (//) to split all the cubes out; it seems like an oct/kd would be the better option, as you can just partition on a per cube level not a per triangle level. Use some algorithm to work out which blocks can currently be seen, as blocks closer to the user could obfuscate the blocks behind, making it pointless to render them. Keep the block object themselves lightweight, so it is quick to add and remove them from the trees.   I guess there is no right answer to this, but I would be interested to see peoples' opinions on the subject.  How would you improve performance in a large voxel-based world? How do I get Skyrim to recognize I don't have a follower anymore? Why Process Builder doesn't work on Delete Scenario? As most of the time we have to think of requirement to accomplished using out-of-Box feature like e.g process builder which we think of an alternative to trigger, but suppose I have to handle scenario of Delete using Process Builder then there is limitation!(e.g calculation of roll-up on Delete) so I am curious about what is that limitation because of which Delete scenario is not handled in Process Builder. When I boot in GRUB2 and press c, I have access to GRUB shell.  How to change the keyboard layout (language) of this GRUB shell?  Note that I'm booting an Ubuntu VM inside Virtualbox. What would happen if you used a dead person's hair in Polyjuice Potion? Polyjuice Potion is changing based on someone's current physical state. It shows tattoos (or lack of) and such from DH when Ron changed to Harry.     "I knew Ginny was lying about that tattoo,” said Ron, looking down at his bare chest.    What would happen if someone used hair of a dead person, taken from their body after death, and drank the potion? Would they die as well? How do I split a string with multiple separators in JavaScript? I'm trying to split on both commas and spaces, but AFAIK JavaScript's split() function only supports one separator. Wave states with great confidence that Incursio is weaker than Grand Chariot, because Incursio was a prototype for Grand Chariot, etc.  The early clashes between Wave and Tatsumi can lead the viewer to such conclusion, but Incursio's has the ability to evolve (from the beast it was made of), while Grand Chariot doesn't.  If you watched to the finale, we can see that      Tatsumi causes Incursio to evolve so much during the fight against Shikoutazer that it even gains the ability to fly. While it is enough to defeat the emperor, unfortunately not enough to save Tatsumi's life.   Considering this, I don't think that Incursio was the weaker one. Is it so? I am trying to estimate summary statistics of points located inside a polygon. Each points in the point layer is associated with N attributes. My target is to summarize (say mean, min,..) the attributes of points located within a polygon and populate the attribute fields of the corresponding polygon.   I am looking for a solution using GeoPandas or other Python libraries.   import geopandas as gpd    gdf_points = gpd.read_file('/path_to_points.json') gdf_polygon = gpd.read_file('/path_to_polygons.json')  dfsjoin = gpd.sjoin(gdf_polygon ,gdf_points)   Now, how can I summarize the stats for each attribute in the point layer and add it to the polygon shapefile? Which function can I use?  I am looking for something that is functionally equivalent to ESRI ArcGIS  with QGIS installation error Postgres JDBC connection in Eclipse Help I'm trying to get a postgres jdbc connection working in eclipse. It would be nice to use the Data Source Explorer, but for now I'm just trying to get a basic connection. What I have done so far is download the postgres JDBC connector. I then tried two different things. First, Preferences-> Data Management, I tried to add the postgres connector. Second, I added the jar to my project and tried to load the driver using Class.forName("org.postgresql.Driver"); but neither worked. Does anyone have any ideas?  Thanks,    Charlie Elements order in a "for (… in …)" loop Maximal ideals in the ring of real functions on $[0,1]$ Let $S$ be the ring of all continuous functions from $[0,1]$ to $\mathbb R$. How to prove that all maximal ideals of $S$ have the form $M_{x_0}=\{f\in S \mid f(x_0)=0\}$?   Thanks in advance. I'm wondering how can I simulate a sample of n Weibull distribution lifetimes that include Type I right-censored observations. For instance lets have the n = 3, shape = 3, scale = 1 and the censoring rate = .15, and the censoring time = .88.  I know how to generate a Weibull sample but I do not know how to generate a censored data that have type I right-censored in R.  T = rweibull(3, shape=.5, scale=1) Does the closedness of a subgroup $H$ of $G$ imply that for $h\in H, g\in G \setminus H: hg \not \in H$?  I'm new to abstract algebra and this would appear to be a useful result. However, by definition, a subgroup is nearly closed, and I don't think this directly implies that for any element $g$ from $G$ not in $H$, the composition $gh \not \in H$.  Is this in fact a true statement? 1.7.4 Problem with mobs spawning Does changing your Compute Device, change all computes of Blender? So, I have recently moved from using Blender, on my family's Nettop PC, to my personal, gaming PC. And with this move, came to option to use CUDA instead of CPU.  Which leaves the question, if I move to CUDA, does that change all computing, for like physics baking, or only for rendering?  Just a nooby question that I wanted to know, and yes, I know you can specify GPU rendering separately. How do I make Endermen spawn more frequently? I'm playing vanilla Minecraft, and am getting ready to head to the end.  I need Eyes of Ender (and hence Ender Pearls), and in my main hunting grounds (a large desert area) as little as one Enderman may spawn per night.  Is there any way to "promote" Enderman spawning so I can get pearls more quickly? A man wonders why perforations don't work. He decides nothing is the strongest thing in the universe. He exploits his finding.