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• Why is FLT_MIN equal to zero?

  - by Nick Forge

  limits.h specifies limits for non-floating point math types, e.g. INT_MIN and INT_MAX. These values are the most negative and most positive values that you can represent using an int. In float.h, there are definitions for FLT_MIN and FLT_MAX. FLT_MAX is equal to a really large number, as you would expect, but why does FLT_MIN equal zero?

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• Convert date, datetime to timestamp

  - by Beau Martínez

  How can I produce a timestamp to millisecond accuracy from a date or datetime in Python? There are an overwhelming number of methods and ways of doing this, and I'm wondering which is the most Pythonic way.

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• Rotating images with CSS and putting them back in place

  - by fuenfundachtzig

  When I rotate a large image with CSS -moz-transform: rotate(270deg); which sits in a floating div (using Firefox 3.6.3 to display the page), it messes up the page layout: Apparently, the size of the image is evaluated before it has been rotated. Furthermore, the image is displaced, partly being out of the screen, because the point it is rotated about is fixed. How can I improve this? (-moz-transform-origin doesn't help here.)

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• problem with Double and Rational Number

  - by altair211

  Hi, I am writing a function in which I need to read a string contains floating point number and turn it back to Rational. But When I do toRational (read input :: Double), it will not turn for eg: 0.9 into 9 % 10 as expected, but instead 81..... % 9007... Thx

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• WPF ToolBar: how to customize appearance (remove dots on the left)

  - by Nike

  I use ToolBar for my WPF application. As I understand, there is no easy way to make it floating. I just want to remove element which I don't want to be displayed: several dots in the left side of ToolBar. Is there any Properties to customize view of ToolBar? Or, maybe, it's possible to redefine a ToolBar Template?

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• Fixing VB6 inaccurate mathmetical results due to rounding

  - by jay

  Try running this in a .VBS file MsgBox(545.14-544.94) You get a neat little answer of 0.199999999999932! This rounding issue also occurs unfortunately in Sin(2 * pi) since VB can only ever see the (user defined) variable pi as accurate as 3.14159265358979. Is rounding it manually (and loosing accuracy) the only way to improve the result? What is the most effective way of dealing with this kind of problem?

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• What is the best method to convert to an Integer in JavaScript?

  - by Mathew Byrne

  There are several different methods for converting floating point numbers to Integers in JavaScript. My question is what method gives the best performance, is most compatible, or is considered the best practice? Here are a few methods that I know of: var a = 2.5; window.parseInt(a); // 2 Math.floor(a); // 2 a | 0; // 2 I'm sure there are others out there. Suggestions?

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• Running on Windows CE 6 'and' Windows XP

  - by Psychic

  Is it possible to create a small program that will run, without recompiling and without emulators, on both Windows CE 6 AND Windows XP SP3? From my knowledge, this isn't possible. Source code needs to be recompiled for the target platform. However, a hardware manufacturer for embedded boards is claiming otherwise. The application isn't anything complex, just a simple benchmarking tool analysing floating point operations, CPU ticks etc, and displaying the results on a plain GUI.

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• Determine precision and scale of particular number in Python

  - by jrdioko

  I have a variable in Python containing a floating point number (e.g. num = 24654.123), and I'd like to determine the number's precision and scale values (in the Oracle sense), so 123.45678 should give me (8,5), 12.76 should give me (4,2), etc. I was first thinking about using the string representation (via str or repr), but those fail for large numbers: >>> num = 1234567890.0987654321 >>> str(num) = 1234567890.1 >>> repr(num) = 1234567890.0987654

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• How can I call different sprites images and properties of it from a file ?

  - by srikanth rongali

  My small game consists of a player and 10 targets. I have an excel sheet of information of target. It includes the target speed, target accuracy, target probability of hitting of the player. These factors change from target1 to target10. Each time target should appear on screen starting from target1 to target10. How can I call them in such a way?

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• jQuery click off element event

  - by Nic Hubbard

  I have a floating div that gets displayed, and I want it to be hidden when the user clicks off the div. This would be similar to the .hover() funtion callback when hovering off an element. Only I want to do this for click. I tried just setting a click event for the body, which would hide the div, but that gave unexpected results. Anyone have ideas on how I could easily do this?

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• Help me understand FFT function (Matlab)

  - by estourodepilha.com

  1) Besides the negative frequencies, which is the minimum frequency provided by the FFT function? Is it zero? 2) If it is zero how do we plot zero on a logarithmic scale? 3) The result is always symmetrical? Or it just appears to be symmetrical? 4) If I use abs(fft(y)) to compare 2 signals, may I lose some accuracy?

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• Sub-millisecond precision timing in C or C++

  - by andand

  What techniques / methods exist for getting sub-millisecond precision timing data in C or C++, and what precision and accuracy do they provide? I'm looking for methods that don't require additional hardware. The application involves waiting for approximately 50 microseconds +/- 1 microsecond while some external hardware collects data. EDIT: OS is Wndows, probably with VS2010. If I can get drivers and SDK's for the hardware on Linux, I can go there. Thanks.

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• Elegant min/max absolute values in java

  - by Stefano Borini

  I need to get the minimum and maximum values in a collection of floating point values, after applying an absolute value conversion. In python I would do this min(map(abs, [-5, -7, 10, 2])) how can I perform the same operation in java in the most elegant way?

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• How do I convert a double into a string in C++(without scientific notation)?

  - by Charlie Epps

  How to convert a double into a floating-point string representation without scientific notation in C++. "Small" samples (effective numbers may be of any size, such as 1.5E200 or 1e-200) : 0.0000000000000000000000000000000000000000000000000000000023897356978234562 Thank you.

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• Java: Calculate distance between a large number of locations and performance

  - by Ally

  I'm creating an application that will tell a user how far away a large number of points are from their current position. Each point has a longitude and latitude. I've read over this article http://www.movable-type.co.uk/scripts/latlong.html and seen this post http://stackoverflow.com/questions/837872/calculate-distance-in-meters-when-you-know-longitude-and-latitude-in-java There are a number of calculations (50-200) that need carried about. If speed is more important than the accuracy of these calculations, which one is best?

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• Interesting task using random numbers only

  - by psihodelia

  Given any number of the random real numbers from the interval [0,1] is there exist any method to construct a floating point number with zero decimal part? Your algorithm can use only random() function calls and no variables or constants. No constants and variables are allowed, no type casting is allowed. You can use for/while, if/else or any other programming language operands.

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• Rewording/rephrasing english in python

  - by mudder

  I'm not sure if there is even anything out there to do this. Is there any libraries out there that can reword sentences to any degree of accuracy? It doesnt have to be too intelligent.

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• How computer multiplies 2 numbers?

  - by ckv

  How does a computer perform a multiplication on 2 numbers say 100 * 55. My guess was that the computer did repeated addition to achieve multiplication. Of course this could be the case for integer numbers. However for floating point numbers there must be some other logic. Note: This was asked in an interview.

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• Delete lines containing a range pattern in 4rd columns

  - by Andrei

  In a file 4th column contains a floating point numbers dsfsd sdfsd sdfds 4.5 dfsdfsd I want to delete the entire line if the number between -0.1 and 0.1 (or some other range). Can sed or awk do that for me? thanks

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• Calculate rolling / moving average in c or c++

  - by Biohazard

  I know this is achievable with boost as per: Using boost::accumulators, how can I reset a rolling window size, does it keep extra history? But I really would like to avoid using boost. I have googled and not found any suitable or readable examples. Basically I want to track the moving average of an ongoing stream of a stream of floating point numbers using the most recent 1000 numbers as a data sample. What is the easiest way to achieve this?

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• DB2 timestamp PHP DateTime

  - by Dolfa

  After upgrade to PHP 5.3 my application is returning DB2 columns with Timestamp type as "2010-12-15-10.23.22.716000". This is causing problem for PHP DateTime function, as it fails with Failed to parse time string (2010-12-15-10.23.22.716000) at position 25 (0): Unexpected character It seems its having a problem with too much accuracy in DB2 timestamp. Can I somehow force connection to change timestamp format with it is fetching data into?

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• How is animation accomplished in these apps?

  - by android noob

  Most of the Android users use the GO SMS app, and the iPhone users use their normal messaging app (Android rocks). Now, whenever a user types a message and presses the send button, the message's edit text field sets a glossy green background, also the green colored background comes floating at the back of the edit text field. How do they do it? (I have been searching this for a while, but was unable to find an answer.)

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• Hidden features of mod_rewrite

  - by Owen

  There seem to be a decent number of mod_rewrite threads floating around lately with a bit of confusion over how certain aspects of it work. As a result I've compiled a few notes on common functionality, and perhaps a few annoying nuances. What other features / common issues have you run across using mod_rewrite?

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• Converting a const char* into a double

  - by Koning Baard

  I am trying to convert a const char* to a double precision floating point number: int main(const int argc, const char *argv[]) { int i; double numbers[argc - 1]; for(i = 1; i < argc, i += 1) { /* -- Convert each argv into a double and put it in `number` */ } /* ... */ return 0; } Can anyone help me? Thanks

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