Think Bonobo

This article (iphoneincubator.com/blog/windows-views/uiwebview-revisited) talks about how you can make your dynamic htmlStrings to place into a UIWebview while still allowing you to refer to external images and CSS

Place the images and CSS in your app bundle, then use the following code:

NSString *path = [[NSBundle mainBundle] bundlePath]; NSURL *baseURL = [NSURL fileURLWithPath:path]; [webView loadHTMLString:htmlString baseURL:baseURL];

htmlString refers to the HTML string that you generated.

At this point, you can refer to external resources in your html string using relatives paths. For example:

<img src="myimage.png">

Or from within CSS like this:

background-image: url(loading.gif)

To access a key in a c++ map, use the .find() method.

This will search for the key in the map and return it. if it doesn't find the key it returns the .end() value.

e.g., 

map<Object,Object>::iterator it = myMap.find(myKey);

if (it != myMap.end()) {

    // object found

} else {

    // object not found

Check out Sandmoose's site for flipping between two embedded view controllers programmatically while still cooperating with storyboards.

/** actions that take the place re: http://sandmoose.com/post/35714028270/storyboards-with-custom-container-view-controllers for details */

- (void)swapFromViewController:(UIViewController *)fromViewController toViewController:(UIViewController *)toViewController

{

    toViewController.view.frame = CGRectMake(20, 0, self.view.frame.size.width, self.view.frame.size.height-20);

    [fromViewController willMoveToParentViewController:nil];

    [self addChildViewController:toViewController];

    [self transitionFromViewController:fromViewController

                      toViewController:toViewController

                              duration:0.3

                               options:UIViewAnimationOptionTransitionCrossDissolve

                            animations:nil

                            completion:^(BOOL finished) {

                                        [fromViewController removeFromParentViewController];

                                        [toViewController didMoveToParentViewController:self];

                            }

     ];

When programming on iOS, if you make a view that segues to a modal Form Sheet view through a UINavigationController, a weird issue happens where the keyboard won't go away when TextBoxes resignFirstResponder status. (e.g., [myTextField resignFirstResponder])

Apple considers this a feature that prevents too many animations of the keyboard coming into and out of the screen. Of course, this does not help when the 'feature' is undesirable.

The way this is addressed is that the navigation controller requires the method "disablesAutomaticKeyboardDismissal" to always return NO. Making that method is easy:

IN THE .h FILE:

-(BOOL)disablesAutomaticKeyboardDismissal;

IN THE .m FILE:

-(BOOL)disablesAutomaticKeyboardDismissal {

    return NO;

}

The difficult part is that this needs to be put in the UINavigationViewController. If you aren't using a custom ViewController for it already, this could be tricky.

The best ways is to use a feature called categories.

1) open the NEW FILE dialog

2) go to iOs > Cocoa Touch > Objective-C category

3) give it a name (e.g., 'KeyboardDismiss') and change Category on to 'UINavigationController'.

4) Put the method into the new file. The files should look as follows

IN THE .h FILE:

//

//  UINavigationController+KeyboardDismiss.h

//  Catsy

//

//  Created by APS on 11/23/13.

//  Copyright (c) 2013 Alex Z. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface UINavigationController (KeyboardDismiss)

-(BOOL)disablesAutomaticKeyboardDismissal;

@end

IN THE .m FILE:

//

//  UINavigationController+KeyboardDismiss.m

//  Catsy

//

//  Created by APS on 11/23/13.

//  Copyright (c) 2013 Alex Z. All rights reserved.

//

#import "UINavigationController+KeyboardDismiss.h"

@implementation UINavigationController (KeyboardDismiss)

-(BOOL)disablesAutomaticKeyboardDismissal {

    return NO;

}

@end

"[<YOUR UICONTROL> resignFIrstResponder];" is a message sent to tell the iPhone/iPad to hide the keyboard.

One of common design seen with this method is that the programmer wants the user to be able to hide the keyboard by clicking the background (i.e., the view controller). Thus, the programmer assigns a method and links it to a touch up inside action on the view controller.

The common way this method is used is to make a resign first responder for every single one of your elements. This is great in that it gives you more control and awareness of what's going on. However, it does require an additional step that may be forgotten when adding a button or doing a quick edit.

Another way this can be done is the use the following message in your method.

"[self.view endEditing:YES]"

http://youtu.be/5MgBikgcWnY

======

1. Most skills are bundles of skills. break it down as much as you can, pick which aspects and most important. Learn the most important first.

2. Learn just enough to just correct - Don't try to be an expert by reading. learn just enough to be able to notice and correct your errors. Notice your mistakes and find resources to fix it.

3.  Remove the distractions. So you'll actually practice

4. Practice for at least 20 hours.

======- By pre-committing for 20 hours. you will overcome frustration barrier you will face during the incompetence stage.

- there's a small set of things that are really important and the rest is flourish.

Want to use python to identify duplicates in a list?

You can use the following statements

  import collections

my_list = [...] # list of items

dups = [x for x, y in collections.Counter(my_list).items() if y >1]

print dups

The below is basically a summary of this: http://www.skymind.com/~ocrow/python_string/

=== BAD METHODS ===

Method 1: regular string1 += string2

 Slow and inefficient because strings are immutable objects

Method 2: "MutableString" class

This class is actually a wrapper of the regular string class and is not really optimized for building strings

Method 3: Character Arrays:

arrays are mutable in python so you can just add strings using my_array.fromstring('a_string')  and at the very end, return my_array.tostring()

This method is still rather slow compared to the latter fiew

=== GOOD METHODS ===

Method 4: build a list of strings then join it

you can join using ''.join(str_list)

This method is very pythonic and the easiest to handle when you need flexibility for slicing, inserting, and deleting elements.

Method 5: List comprehensions

This is like method 4 but a list comprehension is used instead build the list manually. It is the fastest and most compact expression, and the one recommended by the author

Method 6: Write a Pseudo-File

This method basically creates a file in memory and appends to it with the string elements use the cStringIO module which is written in c instead of the StringIO module which is written in python to maximize efficiency. add elements with: my_string.write('string')

at the very end, return the string with: file_str.getvalue()

Most Popular library is psycopg2...

To configured psycopg2 on a windows machine. The easiest install is using a windows executable binary. You can find it at http://stickpeople.com/projects/python/win-psycopg/.

For linux based system you need the native libraries:

(RPM-Based)

sudo yum install postgresql-devel

(APT Based)

Sometimes different code is required depending on the operating system. For these instances, it is necessary to identify which operating system is in use and run conditional statements based off of this information.

The easiest way is to use the org.apache.commons.lang3 library's SysUtils wrapper function. This can be done as follows:

For example, to determine if the OS is Windows, you can write:

SystemUtils.IS_OS_WINDOWS

If you want to use the direct approach, you can utilize the built-in System library as such:

Getting the Current Date-Time in java can be done with the below code:

public static String getTimeStamp() { SimpleDateFormat sdfDate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//dd/MM/yyyy Date now = new Date(); String strDate = sdfDate.format(now); return strDate; }

the SimpleDateFormat class allows you to format the string easily in the form that you want

If you want milliseconds you can use SS (e.g., ss.SSS)

Here are some sample time 'profiles' from the javadoc:

Date and Time Pattern Result "yyyy.MM.dd G 'at' HH:mm:ss z" 2001.07.04 AD at 12:08:56 PDT "EEE, MMM d, ''yy" Wed, Jul 4, '01 "h:mm a" 12:08 PM "hh 'o''clock' a, zzzz" 12 o'clock PM, Pacific Daylight Time "K:mm a, z" 0:08 PM, PDT "yyyyy.MMMMM.dd GGG hh:mm aaa" 02001.July.04 AD 12:08 PM "EEE, d MMM yyyy HH:mm:ss Z" Wed, 4 Jul 2001 12:08:56 -0700 "yyMMddHHmmssZ" 010704120856-0700 "yyyy-MM-dd'T'HH:mm:ss.SSSZ" 2001-07-04T12:08:56.235-0700 "yyyy-MM-dd'T'HH:mm:ss.SSSXXX" 2001-07-04T12:08:56.235-07:00 "YYYY-'W'ww-u" 2001-W27-3

Below are the pattern letters available:

DynamicReports is a Java api to dynamically produce JasperReports using purely java (i.e., no jrxml).

the horizontalList and verticalList components can be used to consolidate other components together including text, images, subreports, or even other lists.

I was working with these and wanted at one point my my algorithm to know how to check if a list component is empty. You can perform this as follows:

Preparing for my Database class, I wanted to get some practice querying and manipulating a sample SQL database.

- I am using SQLite because it is quick and easy to set up and interact with

- I will probably use firefox's SQLite Manager plugin to query and manipulate the database.

Java 1.7 introduces a 'Files' class that allows a straightforward static call.

Delete with exceptions raised...

Files.delete(path);

e.g. (from java 1.7 documentation),

try { Files.delete(path); } catch (NoSuchFileException x) { System.err.format("%s: no such" + " file or directory%n", path); } catch (DirectoryNotEmptyException x) { System.err.format("%s not empty%n", path); } catch (IOException x) { // File permission problems are caught here. System.err.println(x); }

Delete with exceptions suppressed...

Files.deleteIfExists(path)

Note that this will return a boolean, true if successful, false if it fails.

== Pre Java 1.7 ==

Java versions earlier than 1.7 do not have access to this static method. The following

will suffice:

try{ File file = new File(path); if(file.delete()){ System.out.println(file.getName() + " is deleted. Poof!"); }else{ System.out.println("Delete failed fool."); } }catch(Exception e){ e.printStackTrace(); }

(NOTE: The if statement was used in the example above to show reporting. The try is required for all three examples because SecurityException can occur if permissions are not available.)

This returns a boolean true upon success and false upon file like deleteIfExists.

The major difference between the is that an instance needs to be instantiated. you can create a very small and simple helper function to to get rid of the extra line. Create it as such:

from Ch.9 of JavaScript The Good Parts:

The takeaway... don't underestimate the value of clean style and clear, well-commented code.

"The long-term value of software to an organization is in direct proportion to the quality of the codebase. Over its lifetime, a program will be handled by many pairs of hands and eyes. If a program is able to clearly communicate its structure and characteristics, it is less likely to break when it is modified in the never-too-distant future."

...

from ch 9 of JavaScript the Good Parts:

4 space indents (no tabs)

space between 'if' and '(' to distinguish it from function invocations

space between infix operators (infix operators e.g.,  +, -, &&, ===, !==, etc.)

spaces after commas and colons

Always use blocks (i.e., {}) with if statements even if it's one line

put the { starting a block at the end of the line. this prevents the design bug of JS automatically putting ';' after return.

never assign a variable in an if statement (e.g., if (i = 5)). it looks like it was supposed to be an equality statement but was mistakenly made.

NEVER ALLOW SWITCHES TO FALL THROUGH --  Although it can be useful, it can lead to hard to follow logic and hard to find bugs.