Is the current rating of the buck converter must match the dc load current?
Choosing power supply, how to get the voltage and current ratings?
Python Argument Binders How can I bind arguments to a Python method to store a nullary functor for later invocation?  Similar to C++'s boost::bind.  For example:  def add(x, y):     return x + y  add_5 = magic_function(add, 5) assert add_5(3) == 8 What other languages have features and/or libraries similar to Perl's format? How to Tail -f output with colors using only Awk and show the rest of the output? I was able to do a tail -f output with colors using the awk command. But I'm unsure how to output the rest of the log as it seems to be filtering only those 2 lines. I also want to see the other lines as the log is written.  What do I need to put in the awk command to show the rest of the output?  Image of my issue. The red text above is without using awk and displays the entire tail -f log. And below that is the same command with the awk color filtering. Which meta am I supposed to post on? I'm mostly active on  and we have a separate . Most of my questions on IT Security meta have answers with links here. So my question is, where am I supposed to post what i.e. feature request, bug report, behavior questions? When looking at a PDF document I often want to zoom-out to scroll quickly to its contents and get an overview.  However, when I zoom-out past a certain threshold (it seems to differ per PDF) Safari thinks I want to see the tab overview:    I have never found a use for this function, so it only causes annoyance.  Can I turn this tab overview off somehow? A solution that uncouples the pinch-to-zoom gesture from the functionality would also work.  I'm on Mountain Lion 10.8.5 with Safari 6.1.3. Allow the owner of a post to approve a suggested edit even if it was rejected by reviewers How to print the longest line in a file? I'm looking for the simplest method to print the longest line in a file. I did some googling and surprisingly couldn't seem to find an answer. I frequently print the length of the longest line in a file, but I don't know how to actually print the longest line. Can anyone provide a solution to print the longest line in a file? Thanks in advance. I would like to know if anyone can help me with installing Ubuntu on VirtualBox How can I write a program that can detect by itself that it has been changed? I need to write a small program that can detect that it has been changed. Please give me a suggestion!  Thank you. How do I create a script file for terminal commands? EM with Binomial How to generate XML file dynamically using PHP? I have to generate a xml file dynamically at runtime. Please help me in generating the below XML file dynamically using PHP.  &lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;xml&gt;  &lt;track&gt;      &lt;path&gt;song1.mp3&lt;/path&gt;      &lt;title&gt;Track 1 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song2.mp3&lt;/path&gt;      &lt;title&gt;Track 2 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song3.mp3&lt;/path&gt;      &lt;title&gt;Track 3 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song4.mp3&lt;/path&gt;      &lt;title&gt;Track 4 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song5.mp3&lt;/path&gt;      &lt;title&gt;Track 5 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song6.mp3&lt;/path&gt;      &lt;title&gt;Track 6 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song7.mp3&lt;/path&gt;      &lt;title&gt;Track 7 - Track Title&lt;/title&gt;  &lt;/track&gt;  &lt;track&gt;      &lt;path&gt;song8.mp3&lt;/path&gt;      &lt;title&gt;Track 8 - Track Title&lt;/title&gt;  &lt;/track&gt; What did my neural network just learn? What features does it care about and why? Beamer consists of multiple frame layouts How can I move files and view the progress (e.g. with a progress bar)? When moving large directories using mv, is there a way to view the progress (%)? The cp command on gentoo had a -g switch that showed the progress. Why can't a single photon produce an electron-positron pair? In reading through old course material, I found the assignment (my translation):     Show that a single photon cannot produce an electron-positron pair, but needs additional matter or light quanta.   My idea was to calculate the wavelength required to contain the required energy ($1.02$ MeV), which turned out to be $1.2\times 10^{-3}$ nm, but I don't know about any minimum wavelength of electromagnetic waves. I can't motivate it with the conservation laws for momentum or energy either.  How to solve this task? Limit of derivative is zero. Does it imply a limit for f(x)? Let's say that a player uses the ready action and says "If a character aims at me with a weapon, I'll use Teleport to move behind cover."  What happens? Does this work? If not, please cite the rules to explain why not. What is the distinction between "among" and "amongst"? How to prove two equivalence classes are disjoint?