How to pre-populate fields when creating a new record?
Custom URL Hack - anybody know how can i find the fields IDs from "User" object?
Consider I've set variable site and needs to be printed by echo or printf, but If I use single quote to write something and want to use variable then how?  Example:  $ site=unix.stackexchange.com $ echo "visit:$site" visit:unix.stackexchange.com   But If I use single quote:  $ echo 'visit:$site' visit:$site   Then we know that '' is strong quote and will not expand the variable   I've tried something:  $ echo 'visit:"$site"' visit:"$site"   but do not succeed. So, I am looking for way to print value inside variable while using single quote. prove that a connected graph with $n$ vertices has at least $n-1$ edges Show that every connected graph with $n$ vertices has at least $n − 1$ edges.  How can I prove this?  Conceptually, I understand that the following graph has 3 vertices, and two edges:  a-----b-----c  with $a$, $b$ and $c$ being vertices, and $\{a,b\}$, $\{b,c\}$ being edges.  Is there some way to prove this logically?  --UPDATE--  Does this look correct?  Any advice on how to improve this proof would be appreciated.  Thank you. What diode modifiers are used in practice to model LEDs with SPICE (Berkeley v.3f5)?  are available to me:  #       Name    Parameter                    Units      Default Example  Area 1       IS      Saturation current             A         1e-14   1e-14    * 2       RS      Ohmic resistance               Ω         0       10       * 3       N       Emission coefficient           -         1       1.0 4       TT      Transit-time                   s         0       0.1ns 5       CJO     Zero-bias junction capacitance F         0       2pF      * 6       VJ      Junction potential             V         1       0.6 7       M       Grading coefficient            -         0.5     0.5 8       EG      Activation energy              eV        1.11    1.11 Si                                                                  0.69 Sbd                                                                  0.67 Ge 9       XTI     Saturation-current temperature exponent  3.0     3.0 jn                                                                  2.0 Sbd 10      KF      Flicker noise coefficient      -         0 11    AF      Flicker noise exponent         -         1 12    FC      Coeff. for for.-bias dep. cap. formula   0.5 13    BV      Reverse breakdown voltage      V         ∞       40.0 14    IBV     Current at breakdown voltage   A         1.0e-3 15    TNOM    Parameter measurement temp.    °C        27      50         The dc characteristics of the diode are determined by the parameters IS and N. An ohmic resistance, RS, is included. Charge storage effects are modeled by a transit time, TT, and a nonlinear depletion layer capacitance which is determined by the parameters CJO, VJ, and M. The temperature dependence of the saturation current is defined by the parameters EG, the energy and XTI, the saturation current temperature exponent. The nominal temperature at which these parameters were measured is TNOM, which defaults to the circuit-wide value specified on the .OPTIONS control line. Reverse breakdown is modeled by an exponential increase in the reverse diode current and is determined by the parameters BV and IBV (both of which are positive numbers).   For example, using this basic, cheap red:      I don't care much about high-frequency characteristics -- just would like to be able to match it's IV-curve within its operating specs (-10uA/-5V leakage to +100mA/+2.2'ishV forward): Java Interface Usage Guidelines -- Are getters and setters in an interface bad? I have a USB flash drive which is no longer recognized by my computer. Windows Disk Management and DiskPart report No Media with no storage space (0 bytes) on the drive and I cannot partition or format the drive:     If the drive appears in Windows Explorer, trying to access it returns an error message indicating that there is no disk inserted, such as the following:     Please insert a disk into drive X:.   Various disk partitioning and data recovery utilities don't recognize the drive or only give a generic name for the drive and cannot access the contents of the drive.  What can I do? How do I recover data from the drive?     This question comes up often and the answers are usually the same. This post is meant to provide a definitive, canonical answer for this problem. Feel free to edit the answer to add additional details. Using first person or third person in papers? Are there written or unwritten rules for avoiding the use of first-person while writing research papers? I was advised at the beginning of my grad school to avoid use of first person - but I still don't know why I should do this.  I have seen that, at many places, authors refer to themselves are "the authors" and not "we". At the same time, I have also seen use of first-person to a good extent.    Do these things differ in different Journals and Conferences (and in different disciplines as well - mine happens to be CS)? What is the purpose of JNDI Is it ever acceptable to have a  in your C or C++ application?  What if you allocate some memory and use it until the very last line of code in your application (for example, a global object's destructor)? As long as the memory consumption doesn't grow over time, is it OK to trust the OS to free your memory for you when your application terminates (on Windows, Mac, and Linux)? Would you even consider this a real memory leak if the memory was being used continuously until it was freed by the OS.  What if a third party library forced this situation on you? Would refuse to use that third party library no matter how great it otherwise might be?  I only see one practical disadvantage, and that is that these benign leaks will show up with memory leak detection tools as false positives. Find the probability of an event determined by an inequality on exponential random variables Let X and Y be independent random variables such that $X∼Exp(1)$ and $Y∼Exp(2)$.  Find the probability that $3X+4Y≤5$.  I thought the equation for solving this was the integral from $\int_0^a \int_ 0^{(a-y)} \lambda_1 e^{-\lambda_1 x}\lambda_2 e^{-\lambda_2 y} dx dy$ where $a = 5$, so I first started with the integral from $\int_0^5 \int_0^{(5-y)} 3 \times 1e^{-1x} \times 4 \times 2e^{-2y} dx dy$ and got $23.83828927$ which is much larger than a probability can be. Any help? How do I free up more space in /boot? What is the scope of variables in JavaScript? Today, we had a math class, where we had to show, that $a_{100} &gt; 14$ for  $$a_0 = 1;\qquad a_{n+1} = a_n + a_n^{-1}$$  Apart from this task, I asked myself: Is there a closed form for this sequence? Since I didn't find an answer by myself, can somebody tell me, whether such a closed form exists, and if yes what it is? Is it okay to use my US visa after a name change? How do you count the lines of code in a Visual Studio solution? What is code coverage and how do YOU measure it?  I was asked this question regarding our automating testing code coverage. It seems to be that, outside of automated tools, it is more art than science. Are there any real-world examples of how to use code coverage? Does DTIME(O(n)) = REGULAR? How do I turn on SharePoint App store in SharePoint 2013 I installed nginx a while ago using the ubuntu PPA repository.  Now I want to compile nginx from source so I can compile in and use the geo-ip module.  I know how to compile the new nginx from source.  How can I remove the nginx binary which was installed by the package?  I want to leave all the configs and logs and upstart stuff etc untouched.  I really just want to remove the old binary.  How can I do this? Geomagnetic reversal? I have always been told that the geomagnetic field acts "as if" there were a bar magnet inside the Earth. I now this is not true, but I feel that knowing what is actually going on would help me understand the answer to the question that I'm about to ask:  Why does geomagnetic reversal happen? Is it something gradual or relatively fast?  (What is the origin of the geomagnetic field? Can we answer my questions starting from this mechanism? Natural Sounding Text to Speech? I am looking for some easy to install text to speech software for Ubuntu that sounds natural. I've installed Festival, Gespeaker, etc., but nothing sounds very natural. All very synthetic and hard to understand.  Any recommendations out there?