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The  specifically says not to ask  for career advice but people do it anyway.  Should I consider the Help Center outdated or only loosely enforced?    And what about a career advice site on the network?  There are 70+ sites, and most of them are for relatively narrow interests (which is not a criticism, I enjoy looking through the many sections).  A career section seems like it would be very popular.  Also, a careers section would help keep career questions off the other sites. food safety regarding re freezing twice cooked chicken Convert a list to a string in C# I used Sound Juicer to rip a CD of audio for a language learning book so that I could listen to them on my Android. However, Sound Juicer seems to only have the option of numbering files without leading zeros. Like this:  track_1.mp3 track_10.mp3 track_11.mp3   This leads to some confused ordering on my music player. So, I want to add some zeros to the name, so that they're ordered properly, like this:  track_01.mp3 track_02.mp3 track_03.mp3   How do I accomplish this? I tried using GPRename, but while it has the ability to add numbers, it doesn't seem to have any options for adding leading zeros.  Is there a better program or something I can do at the command line? Why are the shebang parts of the following elementary scripts not working:  $ cat hello.sh #! /bin/sh echo Hello $ ./hello.sh bash: ./hello.sh: /bin/sh^M: bad interpreter: No such file or directory  $ cat hello.py #! /usr/bin/env python3 print("Hello") $ ./hello.py : No such file or directory   whereas calling the interpreter manually is working:  $ sh hello.sh Hello $ python3 hello.py Hello How can I clear the water out of this area? I've sectioned of this area in the sea near my base, and I need to get rid of all the water from it.  From what I've tried the only way I can see to clear it is fully cover one layer, delete the blocks, then go down to the next layer. Is that the only way I can clear the area or is there a better approach?  Ideally I'd like a survival method (if there is a better one), but any commands what could be used I'd like to hear just so I can learn more commands :) What is the difference between cascade & inverse in hibernate, what are they used for? A large number of variants of this question were already asked here, including these - , , which are close, but none seem to answer my question. Assume that $n$ balls are thrown randomly and independently into $k$ bins.  What is the probability of finding $x$ empty bins? What is the expectation of the number of empty bins? I've been asked to show that:  $n(n+1)(2n+1) \equiv 0 \pmod 6$  I found in a previous question that:  $n(n+1)$ was divisible by $2$ and resulted in an even number e.g  $n(n+1) \equiv 0 \pmod 2$  so I figured I needed to find:  $(2n+1) \equiv 0 \pmod 3$ in order to complete  $n(n+1)(2n+1) \equiv 0 \pmod 6$  but I am unsure on how to find $(2n+1) \equiv 0 \pmod 3$  Is this the right way to find the mod 6 and if so could you tell me how I could find  $(2n+1) \equiv 0 \pmod 3?$ Can't update drupal core to 7.27 Programmatical Setting of 'Store Relative Pathways' for multiple MXDs ArcGIS 10.1 I am looking to move large number of mxds to a different location on the same drive. Many mxds haven't got 'Store relative pathways' option checked therefore this operation will result in broken links to data. I've only started using ArcGIS 10.1 and it is now possible to programmatically update relative pathways for all mxds by using arcPy and setting relativePaths to be "True". I had a go at writing Python script which (in theory) loops through a top folder and searches for all mxds and then updates "Store relative pathways" setting to be on. When I run this script in PyScripter, it fails to complete, I get the following error:  "exceptions.NameError: name 'mxd' is not defined  Can anyone help ?!? Thanks in advance, Magda      import arcpy, os  folderPath = r"C:\My Folder Path\...\...\..."  for filename in os.listdir(folderPath):     fullpath = os.path.join(folderPath, filename)     if os.path.isfile(fullpath):         basename, extension = os.path.splitext(fullpath)         if extension.lower() == ".mxd":             mxd = arcpy.mapping.MapDocument(fullpath)             mxd.relativePaths = 'True'         mxd.save() del mxd How to execute a JavaScript function when I have its name as a string I am running QGIS 2.18.14 (QGIS code revision: ff83b9a479) on a windows 7 machine, it comes with GRASS 7.2.2 (Code Revision r71496), but it does not come with r.in.lidar. I have noticed QGIS 2.18.16.1 has the same problem and it shares the same GRASS 7.2.2 (Code Revision r71496).  I know there were some issues with it and later solved as I read , I also certailny used it short ago in 2017, so I wonder which version should I go for before starting the always risky attempt of a new installation. Technique for finding the nth term I'm a trainee teacher and I need to pass a skills test in maths, but I'm having trouble in this particular area of algebra in finding the nth term of any sequence. I've been given a series of questions to answer one of them is:  Find the nth term of the sequence 3, 8, 15, 24.  I not only need to know the answer but more importantly the technique. This is GCSE level. How do I use F3 to get my coordinates when my laptop makes F3 a special key? I can't get the coordinates on my computer because it keeps changing the brightness.  I have a windows 8 Samsung, and I'm playing Minecraft version 1.6.4. Spacing before and after section titles Does $\lim_{z\rightarrow0}\frac{\bar{z}^2}{z^2}$ exist? Extract all the polygon coordinates from a SpatialPolygonsDataframe? I want to do something relatively simply but it seems to be very difficult to do, though I am very new to using R for spatial data so apologies if I've missed something obvious.  I have a list containing 161 shapefiles of bird distributions in the world, they are each in the format of a SpatialPolygonsDataFrame. I also have world climate data in a raster stack format for 8 variables. Both sets of files are in the same projection (lat and long WGS84). I want to create new columns for the climate data with 1's where the species polygon overlaps with the climate data and 0 where it doesn't. I tried various functions to do this, quite a few initial options didn't work, the best option appeared to be:  pnt.in.poly(XY coordinates of climate data points, XY coordinates of species polygon)   I changed my raster of climate data into points to get the XY coordinates. I unified the polygons for each species shapefile and then used:  species@polygons[[1]]@Polygons[[1]]@cords   to get the coordinates for my species polygons as a matrix. However, I discovered that:  species@polygons[[1]]@Polygons[[1]]@coords    wasn't actually getting all the coordinates of the polygons only some of them.  I tried using fortify from the ggplot package, and it gives me a dataframe with coordinates but some of them are for holes in the polygons. I ran that with the pnt.in.poly function excluding the holes but it took an hour to run and when I looked at the output maps after it matched for some of the range but not all of it- there were holes in the distribution where there shouldn't be holes.   I also tried this method that I found somewhere else:  lonlat &lt;- lapply(slot(species, "polygons"), function(x) lapply(slot(x,"Polygons"), function(y) slot(y, "coords")))    which gives me a list with 436 items- but I'm still not sure how to get the coordinates into a matrix form that will work in pnt.in.poly.  I'm sure this should be easier to do! Does anyone know a better way? I'm using a 5 V / 2 A voltage regulator () without a heatsink. I'm testing the circuit with a microcontroller (PIC18FXXXX), a few LEDs and a 1 mA piezzo buzzer. The input voltage is aprox. 24 VDC. After running for a minute, the voltage regulator starts to overheat, meaning it burns my finger if I keep it there for more than a second. Within a few minutes it starts to smell like it's burnt. Is this a normal behavior for this regulator? What could cause it to heat that much?    Other components used in this circuit:  L1:   R2:   F1: How to install TP-LINK Archer T4U driver?