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  • Faster way to know the tolal number of rows in Mysql Database?

    - by Starx
    If I need to know the total number of rows in a table of database I do something like $query = "SELECT * FROM tablename WHERE link='1';"; $result = mysql_query($query); $rows = mysql_fetch_array($result); $count = count($rows); So you see the total number of data is recovered scanning through entire database Is there a better way

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  • why IEEE floating point number calculate exponent using a biased form?

    - by lenatis
    let's say, for the float type in c, according to the IEEE floating point specification, there are 8-bit used for the fraction filed, and it is calculated as first taken these 8-bit and translated it into an unsigned number, and then minus the BIASE, which is 2^7 - 1 = 127, and the result is an exponent ranges from -127 to 128, inclusive. But why can't we just treat these 8-bit pattern as a signed number, since the resulting range is [-128,127], which is almost the same as the previous one.

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  • Regex for Password Must be contain at least 8 characters, least 1 number and both lower and uppercase letters and special characters

    - by user2442653
    I want a regular expression to check that Password Must be contain at least 8 characters, including at least 1 number and includes both lower and uppercase letters and special characters (e.g., #, ?, !) Cannot be your old password or contain your username, "password", or "websitename" And here is my validation expression which is for 8 characters including 1 uppercase letter, 1 lowercase letter, 1 number or special character. (?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$" How I can write it for password must be 8 characters including 1 uppercase letter, 1 special character and alphanumeric characters?

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  • How to convert from string to a number, and vice-versa in C++?

    - by Igal
    DEAR All I'm new to the C++, so maybe someone can say what the proper way to write a function that gets a string char (represents number) and converts it to the integer number. For example : input : Sixty five, output: 65. Maybe it should use by cin.getline() ? Well, vice-versa is little bit simlper... Thanks for advance. Igal

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  • How to automatically include a number of images in the SWF file?

    - by Ponty
    Hi, i'm trying to include a number of images in my SWF file not by loading them but by embedding them in the SWF itself. I found the following instruction to do that: [Embed(source="../graphics/images/ss0.png")] private var SS0:Class; Basically, i want to embed a different number of images each time. Is there a way to do that automatically (let's say inside a for loop) or do i have to type manually this instruction for each image i want to include?

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  • a function that returns a random number that is a multiple of 3 between 0 and the function's non-negative integer parameter n

    - by martin
    I need to write a function called multipleOf3 that returns a random number that is a multiple of 3 between 0 and the function's non-negative integer parameter n and here is the result i want [Note: No number returned can be greater than the value of the parameter n] Examples: multipleOf3(0) -- 0 multipleOf3(1) -- 0 multipleOf3(2) -- 0 multipleOf3(3) -- 0 or 3 multipleOf3(20) -- 0 or 3 or 6 or 9 or 12 or 15 or 18

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  • How do I create a query which displays dots (....) after a certain number of characters within the field

    - by Marchese Il Chihuahua
    I would like to create a query on a field which after a certain number of characters adds/displays a number of dots to show the user that there is additional text to read. At the moment there is a syntax error using the following code in which it doesn't like the "Left" instruction: X:IIF(len(description) > 5, Left(description, 5) & "....", description) Note: "X" is what i am naming the field 'description' in my query screen in Access

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  • Help to edit the Recent Posts Wordpress widget to diplay in all 3 languages at once

    - by CreativEliza
    Site link: http://nuestrafrontera.org/wordpress/ I want the feed of recent post titles to show in the sidebar for all 3 languages, separated by language. So, for example, under Recent Posts the sidebar would have "English" and then the latest 3 posts in English, then "Español" and the latest 3 in Spanish and then French. All in a list in the column and appearing on all pages with the sidebar in all languages. I am using the most current version of Wordpress with the WPML plugin. I believe the Wordpress widget for Recent Posts needs to be tweaked to do this. Here is the code (from wp-includes/default-widgets.php): class WP_Widget_Recent_Posts extends WP_Widget { function WP_Widget_Recent_Posts() { $widget_ops = array('classname' => 'widget_recent_entries', 'description' => __( "The most recent posts on your blog") ); $this->WP_Widget('recent-posts', __('Recent Posts'), $widget_ops); $this->alt_option_name = 'widget_recent_entries'; add_action( 'save_post', array(&$this, 'flush_widget_cache') ); add_action( 'deleted_post', array(&$this, 'flush_widget_cache') ); add_action( 'switch_theme', array(&$this, 'flush_widget_cache') ); } function widget($args, $instance) { $cache = wp_cache_get('widget_recent_posts', 'widget'); if ( !is_array($cache) ) $cache = array(); if ( isset($cache[$args['widget_id']]) ) { echo $cache[$args['widget_id']]; return; } ob_start(); extract($args); $title = apply_filters('widget_title', empty($instance['title']) ? __('Recent Posts') : $instance['title']); if ( !$number = (int) $instance['number'] ) $number = 10; else if ( $number < 1 ) $number = 1; else if ( $number > 15 ) $number = 15; $r = new WP_Query(array('showposts' => $number, 'nopaging' => 0, 'post_status' => 'publish', 'caller_get_posts' => 1)); if ($r->have_posts()) : ?> <?php echo $before_widget; ?> <?php if ( $title ) echo $before_title . $title . $after_title; ?> <ul> <?php while ($r->have_posts()) : $r->the_post(); ?> <li><a href="<?php the_permalink() ?>" title="<?php echo esc_attr(get_the_title() ? get_the_title() : get_the_ID()); ?>"><?php if ( get_the_title() ) the_title(); else the_ID(); ?> </a></li> <?php endwhile; ?> </ul> <?php echo $after_widget; ?> <?php wp_reset_query(); // Restore global post data stomped by the_post(). endif; $cache[$args['widget_id']] = ob_get_flush(); wp_cache_add('widget_recent_posts', $cache, 'widget'); } function update( $new_instance, $old_instance ) { $instance = $old_instance; $instance['title'] = strip_tags($new_instance['title']); $instance['number'] = (int) $new_instance['number']; $this->flush_widget_cache(); $alloptions = wp_cache_get( 'alloptions', 'options' ); if ( isset($alloptions['widget_recent_entries']) ) delete_option('widget_recent_entries'); return $instance; } function flush_widget_cache() { wp_cache_delete('widget_recent_posts', 'widget'); } function form( $instance ) { $title = esc_attr($instance['title']); if ( !$number = (int) $instance['number'] ) $number = 5; ?> <p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label> <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo $title; ?>" /></p> <p><label for="<?php echo $this->get_field_id('number'); ?>"><?php _e('Number of posts to show:'); ?></label> <input id="<?php echo $this->get_field_id('number'); ?>" name="<?php echo $this->get_field_name('number'); ?>" type="text" value="<?php echo $number; ?>" size="3" /><br /> <small><?php _e('(at most 15)'); ?></small></p> <?php } }

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  • How to allow multiple inputs from user using R?

    - by Juan
    For example, if I need that the user specifies the number of rows and columns of a matrix: PROMPT: Number of rows?: USER INPUT: [a number] I need that R 'waits' for the input. Then save [a number] into a variable v1. Next, PROMPT: Number of columns?: USER INPUT: [another number] Also save [another number] into a variable v2. At the end, I will have two variables (v1, v2) that will be used in the rest of the code. "readline" only works for one input at a time. I can't run the two lines together v1 <- readline("Number of rows?: ") v2 <- readline("Number of columns?: ") Any ideas or suggestions? Thank you in advance

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  • Compile Error Using MutableClassToInstanceMap with Generics

    - by user298251
    I am getting the following compile error "The method putInstance(Class, T) in the type MutableClassToInstanceMap is not applicable for the arguments (Class, Number)" on the putInstance method call. Does anyone know what I am doing wrong?? Thanks! public class TestMutableClassToInstanceMap { public final MutableClassToInstanceMap<Number> identifiers = MutableClassToInstanceMap.create(); public static void main(String[] args) { ArrayList<Number> numbers = new ArrayList<Number>(); numbers.add(new Integer(5)); TestMutableClassToInstanceMap test = new TestMutableClassToInstanceMap(numbers); } public TestMutableClassToInstanceMap(Collection<Number> numbers){ for (Number number : numbers) { this.identifiers.putInstance(number.getClass(), number); //error here } this.identifiers.putInstance(Double.class, 5.0); // This works } }

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  • jquery - deciding whether a user is "away"

    - by Phil Jackson
    hi, im doing a little test to check whether the user is "away" (unactive) or not; function away_status(){ $("#away_stat_update").everyTime(1000, function(i) { var number = Number($(this).html()); if( number == 20 ) { // set user as away alert( "user away" ); } if( number > 20 ) { $("*").mousemove(function(e){ $("#away_stat_update").html(0); var number = Number(0); // reset user to being online alert( "user back online" ); }); } $("#away_stat_update").html( number + 1 ); }); $("*").mousemove(function(e){ $("#away_stat_update").html(0); }); } away_status(); the only problem is that when the number is greater than 20 and the mouse is moved it keeps alerting "user back on line" instead of doing it just once. The number is resetting by the way.

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  • Very difficult SQL query

    - by db666
    For the following table definitions: Name Null? Type Comments ------------------------------- -------- ---- ------------------------------------ ENUM NOT NULL NUMBER(4) ENUM should not exceed a length of 4. ENAME CHAR(15) ADDRESS CHAR(25) ADDRESS should not exceed 25 characters. SALARY NUMBER(5) OFFICE CHAR(4) DNUM NOT NULL NUMBER(4) Department which this employee belongs to department Name Null? Type Comments ------------------------------- -------- ---- ------------------------------------- DNUM NOT NULL NUMBER(4) DMGR NOT NULL NUMBER(4) Department manager DNAME NOT NULL CHAR(15) project Name Null? Type Comments ------------------------------- -------- ---- ------------------------------------- PNUM NOT NULL NUMBER(4) PMGR NOT NULL NUMBER(4) Project manager PTITLE NOT NULL CHAR(15) emp_proj Name Null? Type ------------------------------- -------- ---- PNUM NOT NULL NUMBER(4) ENUM NOT NULL NUMBER(4) I have to write SQL query which will find the names of employees who do not share an office but work on the same project, and have different salaries... I've spent last three days trying to figure out something, but no idea as far. I will appreciate any advice.

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  • stack of a c program

    - by ckarthickit
    how the stack would look like for the following program if I give input as 5. #include <stdio.h> int fibonacci(int number) { int retval; if (0 == number){ return 0; } if (1 == number){ return 1; } return(fibonacci(number-1) + fibonacci(number-2)); } int main() { int number = 0; int fibvalue = 1; while (1){ printf("please enter the number\n"); scanf("%d", &number); fibvalue = fibonacci(number); printf("computed fibonacci value %d\n", fibvalue); } return 1; } also give me links where i can learn about it

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  • Find most right and left point of a horizontal circle in 3d Vector environment

    - by Olivier de Jonge
    I'm drawing a 3D pie chart that is rendered with in 3D vectors, projected to 2D vectors and then drawn on a Graphics object. I want to calculate the most left and right point of the circle The method to create a vector, draw and project to a 2d vector are below. Anyone knows the answer? public class Vector3d { public var x:Number; public var y:Number; public var z:Number; //the angle that the 3D is viewed in tele or wide angle. public static var viewDist:Number = 700; function Vector3d(x:Number, y:Number, z:Number){ this.x = x; this.y = y; this.z = z; } public function project2DNew():Vector { var p:Number = getPerspective(); return new Vector(p * x, p * y); } public function getPerspective():Number{ return viewDist / (this.z + viewDist); } }

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  • Do you know any build systems with decent support for parallelization?

    - by dahpgjgamgan
    Hi, I am looking for a build system (working on ms windows) that has good support for parallelization of tasks/targets (or whatever you call them). To be more specific - during build (that is initiated on MS Windows machine) I need to copy source files to a number of different machines (which are not necessarily running Windows) and start a remote job on each of them - and I really like to do that on all machines at once. Does anyone know a build system that's capable of executing such a task in parallel. From what I googled, the options currently available are: -j switch in make - but i don't know if nmake supports this -some custom nAnt tasks -msbuild has some form of support for parallelization - seems similiar to make (meaning you don't specify what to do in parallel, just specify that it would be nice to build things that way) -fake (f# make) is written in functional programming language which are known to have good parallelization support - but I'm not very skillful in functional programming area. Any other solutions I could explore?

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  • sql query for student schema

    - by user1214208
    I tried solving the below question.I just want to make sure if I am correct. student(student-name, street, city) offering(department, number, section, time, population) titles(department, number, title) enrollment(student-name, department, number, section) If I need to find The department, number, section, title, and population for every course section The SQL query I tried is : select a.department, a.number, a.section,b.title,population as "students" from offering a ,titles b ,enrollment c,student d where a.department=b.department and a.number=b.number and a.department=c.department and a.number=c.number and a.section=c.section group by a.section Please let me know if I am correct. Thank you for your time and patience.

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