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  • Auto-Completion in Unix VI editor

    - by IllustratedInsomnia
    Hey guys, after using graphical IDE's like Visual Studio, I'm used to pressing CTRL+Space to auto-complete a variable or function name. Now, I know such a thing isn't completely possible in VI, but I heard there was a list of commands that could be mapped that allowed automatic completion of variables and functions in the current file opened. Does anyone know what this sequence is? Thanks in advance.

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  • Rails Cache Sweeper and Model Callback Firing

    - by Topher Fangio
    Hey guys, I have the following classes: class Vigil < ActiveRecord::Base after_update :do_something_cool private def do_something_cool # Sweet code here end end class NewsFeedObserver < ActionController::Caching::Sweeper observe Vigil def after_update # Create a news feed entry end end Everything works as expected. The after_update in the sweeper requires that the do_something_cool method in the model has finished before it can run properly. The problem is that the after_update in the sweeper is being called before (or perhaps at the same time as) the do_something_cool callback and it's causing problems. Does anyone know how to force the after_update in the sweeper to fire after the model callback? Is there better way to achieve this?

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  • Please help me:(

    - by Marin
    Hi! Can anyone please help me?:( I'm desperrate cause I have to finish this script as soon as possible! The problem is: Deprecated: Assigning the return value of new by reference is deprecated in C:\wamp\www\FlashChat_v607\chat\inc\common.php on line 155 Notice: Undefined variable: step in C:\wamp\www\FlashChat_v607\chat\inc\common.php on line 94 and this is the link where you can find the code: http://www5.zippyshare.com/v/3592861/file.html

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  • Pass first element of jsp list to javascript

    - by Lucian Enache
    Ok so I'm trying to access the first element of a JSP list, here's what I've come up with so far without any kind of luck: onclick="alert('<%=list[0]%>');" What's the best approach to access the first element and eventually to pass it to a javascript variable/function ? I've heard that the <% %> tags are deprecated and some are suggesting relaying on JSTL/EL how can one use those without having to iterate the entire list and put a breakpoint for the iterators ?

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  • Removing a Preceding Backslash from Apostrophes

    - by John
    Hello, When I add a comment using the variable below, apostrophes are printed with a backslash in front of them. How can I get rid of the backslashes? Thanks in advance, John Example of printed result: My roommate\'s brother\'s ex-girlfriend\'s aunt drive a Toyota. $comment = mysql_real_escape_string($_POST['comment']);

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  • Keyword Selection Background?

    - by Irwin
    I just installed MSVS2010 Ultimate & I've noticed something which is somewhat annoying & conflicting with my syntax highlighting, as can be seen: As can be seen, when a keyword/function/variable/etc is highlighted all other instances of the aforementioned are highlighted too. This is somewhat annoying. Is there any way to disable this?

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  • Python float copy question

    - by SJA
    Hi, I'm puzzled by some behaviour I'm seeing when copying a float array member into another variable - please help! For example data_entry[1] = 9.6850069951 new_value = data_entry[1] <comment> #print both 9.6850069951 9.6850663300 I'm aware of the problem of binary storage of floats but I thought with a direct copy of memory we would end up with the same value. Any ideas? I need better precision than this! thanks in advance Stuart

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  • Shopping Cart in Flex 4

    - by chchrist
    I am trying to code a shopping cart using Flex 4. I am at the design process and I need to figure out which design pattern to use. I am thinking of using the Singleton pattern. I will have a Product Value Object where I'll save each product's values and the I'll push each product to an array variable in my Singleton class. Is my logic OK? Is there a better way? Thanks in advance

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  • Does the iPhone compress images saved within my app's documents directory?

    - by Jane Sales
    We are caching images downloaded from our server. We write them to our local storage like this: NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0] ; NSString* folder = [[documentsDirectory stringByAppendingPathComponent:@"flook.images"] retain]; NSString* fileName = [folder stringByAppendingFormat:@"/%@", aBaseFilename]; BOOL writeSuccess = [anImageData writeToFile:fileName atomically:NO]; The downloaded images are always the expected size, around 45-85KB. Later, we read images from our cache like this: NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0] ; NSString* folder = [[documentsDirectory stringByAppendingPathComponent:@"flook.images"] retain]; NSString* fileName = [folder stringByAppendingFormat:@"/%@", aBaseFilename]; image = [UIImage imageWithContentsOfFile:fileName]; Occasionally, the images returned from this cache read are much smaller because they are much more compressed - around 5-10KB. Has the OS done this to us?

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  • delete row from selected gridview and database

    - by user175084
    i am trying to delete a row from the gridview and database... It should be deleted if a delte linkbutton is clicked in the gridview.. I am gettin the row index as follows: protected void LinkButton1_Click(object sender, EventArgs e) { LinkButton btn = (LinkButton)sender; GridViewRow row = (GridViewRow)btn.NamingContainer; if (row != null) { LinkButton LinkButton1 = (LinkButton)sender; // Get reference to the row that hold the button GridViewRow gvr = (GridViewRow)LinkButton1.NamingContainer; // Get row index from the row int rowIndex = gvr.RowIndex; string str = rowIndex.ToString(); //string str = GridView1.DataKeys[row.RowIndex].Value.ToString(); RemoveData(str); //call the delete method } } now i want to delete it... so i am having problems with this code.. i get an error Must declare the scalar variable "@original_MachineGroupName"... any suggestions private void RemoveData(string item) { SqlConnection conn = new SqlConnection(@"Data Source=JAGMIT-PC\SQLEXPRESS; Initial Catalog=SumooHAgentDB;Integrated Security=True"); string sql = "DELETE FROM [MachineGroups] WHERE [MachineGroupID] = @original_MachineGroupID; SqlCommand cmd = new SqlCommand(sql, conn); cmd.Parameters.AddWithValue("@original_MachineGroupID", item); conn.Open(); cmd.ExecuteNonQuery(); conn.Close(); } Blockquote <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:SumooHAgentDBConnectionString %>" SelectCommand="SELECT MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted, COUNT(Machines.MachineName) AS Expr1, DATENAME(month, (MachineGroups.TimeAdded - 599266080000000000) / 864000000000) + SPACE(1) + DATENAME(d, (MachineGroups.TimeAdded - 599266080000000000) / 864000000000) + ', ' + DATENAME(year, (MachineGroups.TimeAdded - 599266080000000000) / 864000000000) AS Expr2 FROM MachineGroups FULL OUTER JOIN Machines ON Machines.MachineGroupID = MachineGroups.MachineGroupID GROUP BY MachineGroups.MachineGroupID, MachineGroups.MachineGroupName, MachineGroups.MachineGroupDesc, MachineGroups.TimeAdded, MachineGroups.CanBeDeleted" DeleteCommand="DELETE FROM [MachineGroups] WHERE [MachineGroupID] =@original_MachineGroupID" > <DeleteParameters> <asp:Parameter Name="@original_MachineGroupID" Type="Int16" /> <asp:Parameter Name="@original_MachineGroupName" Type="String" /> <asp:Parameter Name="@original_MachineGroupDesc" Type="String" /> <asp:Parameter Name="@original_CanBeDeleted" Type="Boolean" /> <asp:Parameter Name="@original_TimeAdded" Type="Int64" /> </DeleteParameters> </asp:SqlDataSource> I still get an error : Must declare the scalar variable "@original_MachineGroupID"

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  • numeric cycles in shell

    - by oraz
    hello, what is the name and sintacsys of construcion ((..)) in example below? for ((i=1;i<10;i++)) do echo $i; done it has strange variable i where are other constructons for numeric cycling in shell?

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  • A "Trig" Calculating Class

    - by Clinton Scott
    I have been trying to create a gui that calculates trigonometric functions based off of the user's input. I have had success in the GUI part, but my class that I wrote to hold information using inheritance seems to be messed up, because when I run it gives an error saying: Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - constructor ArcTrigCalcCon in class TrigCalc.ArcTrigCalcCon cannot be applied to given types; required: double,double,double,double,double,double found: java.lang.Double,java.lang.Double,java.lang.Double reason: actual and formal argument lists differ in length at TrigCalc.TrigCalcGUI.(TrigCalcGUI.java:31) at TrigCalc.TrigCalcGUI.main(TrigCalcGUI.java:87) Java Result: 1 and says it is the object causing the problem. Below Will be my code. First I will put up my inheritance class with cosecant secant and cotangent and then my original class with the original 3 trig functions: { public ArcTrigCalcCon(double s, double cs, double t, double csc, double sc, double ct) { // Inherit from the Trig Calc class super(s, cs, t); cosecant = 1/s; secant = 1/cs; cotangent = 1/t; } public void setCsc(double csc) { cosecant = csc; } public void setSec(double sc) { secant = sc; } public void setCot(double ct) { cotangent = ct; } } Here is the first Trigonometric class: public class TrigCalcCon { public double sine; public double cosine; public double tangent; public TrigCalcCon(double s, double cs, double t) { sine = s; cosine = cs; tangent = t; } public void setSin(double s) { sine = s; } public void setCos(double cs) { cosine = cs; } public void setTan(double t) { tangent = t; } public void set(double s, double cs, double t) { sine = s; cosine = cs; tangent = t; } public double getSin() { return Math.sin(sine); } public double getCos() { return Math.cos(cosine); } public double getTan() { return Math.tan(tangent); } } and here is the demo class to run the gui: public class TrigCalcGUI extends JFrame implements ActionListener { // Instance Variables private String input; private Double s, cs, t, csc, sc, ct; private JPanel mainPanel, sinPanel, cosPanel, tanPanel, cscPanel, secPanel, cotPanel, buttonPanel, inputPanel, displayPanel; // Panel Display private JLabel sinLabel, cosLabel, tanLabel, secLabel, cscLabel, cotLabel, inputLabel; private JTextField sinTF, cosTF, tanTF, secTF, cscTF, cotTF, inputTF; //Text Fields for sin, cos, and tan, and inverse private JButton calcButton, clearButton; // Calculate and Exit Buttons // Object ArcTrigCalcCon trC = new ArcTrigCalcCon(s, cs, t); public TrigCalcGUI() { // title bar text. super("Trig Calculator"); // Corner exit button action. setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); // Create main panel to add each panel to mainPanel = new JPanel(); mainPanel.setLayout(new GridLayout(3,2)); displayPanel = new JPanel(); displayPanel.setLayout(new GridLayout(3,2)); // Assign Panel to each variable inputPanel = new JPanel(); sinPanel = new JPanel(); cosPanel = new JPanel(); tanPanel = new JPanel(); cscPanel = new JPanel(); secPanel = new JPanel(); cotPanel = new JPanel(); buttonPanel = new JPanel(); // Call each constructor buildInputPanel(); buildSinCosTanPanels(); buildCscSecCotPanels(); buildButtonPanel(); // Add each panel to content pane displayPanel.add(sinPanel); displayPanel.add(cscPanel); displayPanel.add(cosPanel); displayPanel.add(secPanel); displayPanel.add(tanPanel); displayPanel.add(cotPanel); // Add three content panes to GUI mainPanel.add(inputPanel, BorderLayout.NORTH); mainPanel.add(displayPanel, BorderLayout.CENTER); mainPanel.add(buttonPanel, BorderLayout.SOUTH); //add mainPanel this.add(mainPanel); // size of window to content this.pack(); // display window setVisible(true); } public static void main(String[] args) { new TrigCalcGUI(); } private void buildInputPanel() { inputLabel = new JLabel("Enter a Value: "); inputTF = new JTextField(5); inputPanel.add(inputLabel); inputPanel.add(inputTF); } // Building Constructor for sinPanel cosPanel, and tanPanel private void buildSinCosTanPanels() { // Set layout and border for sinPanel sinPanel.setLayout(new GridLayout(2,2)); sinPanel.setBorder(BorderFactory.createTitledBorder("Sine")); // sinTF = new JTextField(5); sinTF.setEditable(false); sinPanel.add(sinTF); // Set layout and border for cosPanel cosPanel.setLayout(new GridLayout(2,2)); cosPanel.setBorder(BorderFactory.createTitledBorder("Cosine")); cosTF = new JTextField(5); cosTF.setEditable(false); cosPanel.add(cosTF); // Set layout and border for tanPanel tanPanel.setLayout(new GridLayout(2,2)); tanPanel.setBorder(BorderFactory.createTitledBorder("Tangent")); tanTF = new JTextField(5); tanTF.setEditable(false); tanPanel.add(tanTF); } // Building Constructor for cscPanel secPanel, and cotPanel private void buildCscSecCotPanels() { // Set layout and border for cscPanel cscPanel.setLayout(new GridLayout(2,2)); cscPanel.setBorder(BorderFactory.createTitledBorder("Cosecant")); // cscTF = new JTextField(5); cscTF.setEditable(false); cscPanel.add(cscTF); // Set layout and border for secPanel secPanel.setLayout(new GridLayout(2,2)); secPanel.setBorder(BorderFactory.createTitledBorder("Secant")); secTF = new JTextField(5); secTF.setEditable(false); secPanel.add(secTF); // Set layout and border for cotPanel cotPanel.setLayout(new GridLayout(2,2)); cotPanel.setBorder(BorderFactory.createTitledBorder("Cotangent")); cotTF = new JTextField(5); cotTF.setEditable(false); cotPanel.add(cotTF); } private void buildButtonPanel() { // Create buttons and add events calcButton = new JButton("Calculate"); calcButton.addActionListener(new CalcButtonListener()); clearButton = new JButton("Clear"); clearButton.addActionListener(new ClearButtonListener()); buttonPanel.add(calcButton); buttonPanel.add(clearButton); } @Override public void actionPerformed(ActionEvent e) { } private class CalcButtonListener implements ActionListener { public void actionPerformed(ActionEvent ae) { // Declare boolean variable boolean incorrect = true; // Set input variable to input text field text input = inputTF.getText(); ImageIcon newIcon; ImageIcon frowny = new ImageIcon(TrigCalcGUI.class.getResource("/Sad_Face.png")); Image gm = frowny.getImage(); Image newFrowny = gm.getScaledInstance(100, 100, java.awt.Image.SCALE_FAST); newIcon = new ImageIcon(newFrowny); // If boolean is true, throw exception if(incorrect) { try{Double.parseDouble(input); incorrect = false;} catch(NumberFormatException nfe) { String s = "Invalid Input " + "/n Input Must Be a Numerical value." + "/nPlease Press Ok and Try Again"; JOptionPane.showMessageDialog(null, s, "Invalid", JOptionPane.ERROR_MESSAGE, newIcon); inputTF.setText(""); inputTF.requestFocus(); } } // If boolean is not true, proceed with output if (incorrect != true) { /* Set each text field's output to the String double value * of inputTF */ sinTF.setText(input); cosTF.setText(input); tanTF.setText(input); cscTF.setText(input); secTF.setText(input); cotTF.setText(input); } } } /** * Private inner class that handles the event when * the user clicks the Exit button. */ private class ClearButtonListener implements ActionListener { public void actionPerformed(ActionEvent ae) { // Clear field sinTF.setText(""); cosTF.setText(""); tanTF.setText(""); cscTF.setText(""); secTF.setText(""); cotTF.setText(""); // Clear textfield and set cursor focus to field inputTF.setText(""); inputTF.requestFocus(); } } }

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  • Refactoring many nested ifs or chained if statements

    - by Icarus
    Hi, I have an object with large number of similar fields (like more than 10 of them) and I have to assign them values from an array of variable length. The solution would be either a huge nested bunch of ifs based on checking length of array each time and assigning each field OR a chain of ifs checking on whether the length is out of bounds and assigning each time after that check. Both seem to be repetitive. Is there a better solution ?

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  • pthread and child process data sharing in C

    - by mustafabattal
    hi everyone, my question is somewhat conceptual, how is parent process' data shared with child process created by a "fork()" call or with a thread created by "pthread_create()" for example, are global variables directly passed into child process and if so, does modification on that variable made by child process effect value of it in parent process? i appreciate partial and complete answers in advance, if i'm missing any existing resource, i'm sorry, i've done some search on google but couldn't find good results thanks again for your time and answers

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  • Merging some sorted lists with unknown order sequence

    - by Gabriel
    I've some sorted lists with variable number of elements. I wold like to merge the lists into one big list which contains all other lists in same order, without duplicates. Example: 1. XS,M,L,XL 2. S,M,XXL 3. XXS,XS,S,L Result: XXS,XS,S,M,L,XL,XXL The function should notify, if there are elements which have ambiguous positions. Here, it would be XXL and I need to specify its position after XL.

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  • Javascript new object (function ) vs inline invocation

    - by Sheldon Ross
    Is there any considerations to determine which is better practice for creating an object with private members? var object = new function () { var private = "private variable"; return { method : function () { ..dosomething with private; } } } VS var object = function () { ... }(); Basically what is the difference between using NEW here, and just invoking the function immediately after we define it?

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  • How to camelcase decibels?

    - by Roddy
    The standard abbreviations for decibels is "dB" (note the case!) So, if I have a variable, holding (for instance) a maximum dB value, how best to name it? maxDbValue maxdBValue maxDecibelValue something else? Each has disdvantages - #1 swaps the case of the unit, #2 doesn't clearly split max from dB, and #3 is verbose... I think #1 feels best, but...???

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  • Arithmetic operators and function calling in C

    - by Robert Dalton
    I'm not quite sure why I can't do double a = (float) my_Function(45) / 2048 / 2340 / 90; printf("%.4",a); // prints out 0.00 But instead I have to use one more variable as: double a = (float) my_Function(45); double b = (float) a / 2048 / 2340 / 90; printf("%.4",b); // prints out the correct value

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  • PHP Detect if any URL variables have been set

    - by zuk1
    Hey guys, it's kind of hard to explain but basically I want to detect if any variables have been set through the URL. So with my IF statement all of the following should return true: http://domain.com/index.php?m=100 http://domain.com/index.php?q=harhar http://domain.com/index.php?variable=poo&crazy=yes and all the following return false: http://domain.com/index.php http://domain.com/test.php http://domain.com/no_variables.php Any ideas?

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