GuptaNotes

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list all installed packages on android using adb

adb shell pm list packages

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Free IT e-Book site

http://it-ebooks-search.info/

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Create password encrypted zip files on mac

zip -er pathToZIPFile pathToFolder

  Suggestion:

Go to folder to compress and use above command. Otherwise, unwanted folders will be part of zip file.

http://www.maclife.com/article/columns/terminal_101_creating_encrypted_zip_files

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Disable automatic rounding button in iOS webview/safari

input { -webkit-appearance: none; border-radius: 5px; }

http://stackoverflow.com/questions/2918707/turn-off-iphone-safari-input-element-rounding

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Disable UIWebview auto correction

$("input[type='text'], textarea").attr('spellcheck','false');

$("input[type='text'], textarea").attr('autocorrect','off');

$("input[type='text'], textarea").attr('autocapitalization','off');

  http://stackoverflow.com/questions/4000820/iphone-uiwebview-can-auto-complete-be-turned-off-on-a-input-text-field

http://stackoverflow.com/questions/3416867/how-can-i-disable-the-spell-checker-on-text-inputs-on-the-iphone

http://stackoverflow.com/questions/9208931/spellcheck-disable-with-css-not-html

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Print webview console.log to XCode console

//Javascript starts here

console = new Object();

console.log = function(log) {

    var iframe = document.createElement("IFRAME");

    iframe.setAttribute("src", "ios-log:#iOS#" + log);

    document.documentElement.appendChild(iframe);

    iframe.parentNode.removeChild(iframe);

    iframe = null;

}

console.debug = console.log;

console.info = console.log;

console.warn = console.log;

console.error = console.log;

//Javascript ends here

//objC starts here

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType {

         NSString *requestString = [[[request URL] absoluteString] stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding];

    //NSLog(requestString);

    if ([requestString hasPrefix:@"ios-log:"]) {

        NSString* logString = [[requestString componentsSeparatedByString:@":#iOS#"] objectAtIndex:1];

        NSLog(@"Custom console: %@", logString);

        return NO;

    }

    return YES;

}

//objC ends here

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null vs nil vs [NSNULL null]

NSMutableArray *controllers = [[NSMutableArray alloc] init]; for (unsigned i = 0; i < kNumberOfPages; i++) { [controllers addObject:[NSNull null]]; }

Directly from Apple: "The NSNull class defines a singleton object you use to represent null values in situations where nil is prohibited as a value (typically in a collection object such as an array or a dictionary)."

  NSNull defines a singleton object, which means that there's only ever a single instance of NSNull (which you create using [NSNull null]), but it can be used in as many places as you wish.

Technically null and nil are same thing but differ only in style:

Objective-C style says nil is what to use for the id type (and pointers to objects).

C style says that NULL is what you use for void *.

C++ style typically says that you should just use 0.

nil should only be used in place of an id, what we Java and C++ programmers would think of as a pointer to an object. Use NULL for non-object pointers.

Look at the declaration of this method:

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context

Context is a void * (ie a C-style pointer), so you'd definitely use NULL (which is sometimes declared as (void *)0) rather than nil (which is of type id).

http://stackoverflow.com/questions/557582/null-vs-nil-in-objective-c

http://stackoverflow.com/questions/836601/whats-the-difference-between-nsnull-null-and-nil

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Remove gradient background from UIWebView

[self.webView setBackgroundColor:[UIColor clearColor]]; for(UIView* subview in [self.webView1 subviews]){ if([subview respondsToSelector:@selector(setBackgroundColor:)]){ [subview setBackgroundColor:[UIColor clearColor]]; } for(UIView* imageView in [subview subviews]){ if([imageView isKindOfClass:[UIImageView class]]){ imageView.hidden = YES; } } }

http://stackoverflow.com/questions/655225/uiwebview-underside

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add 10 seonds to a javascript date object timeObject

var t = new Date(); t.setSeconds(t.getSeconds() + 10);

http://stackoverflow.com/questions/7687884/add-10-seonds-to-a-javascript-date-object-timeobject

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How can I load a local HTML file into the UIWebView?

[WebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"index" ofType:@"html"]isDirectory:NO]]];

http://stackoverflow.com/questions/4645414/how-can-i-load-a-local-html-file-into-the-uiwebview

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When i am trying to run the javascript i am finding some warnings,how to overcome that

Are you adding those .js files to www? or Plugins? If www - Open your project in finder , project --> www --> add all .js files. Now open your project in xcode and check www, it should expand with all .js files.

If Plugins --When you add the JavaScript file, Xcode detects that the file is a source code file, assumes you want to compile it and automatically adds it to the Compile Sources build phase.

To stop Xcode trying to compile it and make it copy the file instead, expand your target in the Groups and Files list, remove the JavaScript file from the Compile Sources build phase and add it to the Copy Bundle Resources build phase.

http://stackoverflow.com/questions/7201300/when-i-am-trying-to-run-the-javascript-i-am-finding-some-warnings-how-to-overcom

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uiWebview call javascript function syntax

// Substitute your Objective-C values into the string NSString *javaScript = [NSString stringWithFormat:@"setVars('%@', '%@')", var1, var2, nil]; // Make the UIWebView method call NSString *response = [webViewA stringByEvaluatingJavaScriptFromString:javaScript];

http://stackoverflow.com/questions/11921656/uiwebview-call-javascript-function-syntax

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Changing button shades..

//resizableImageWithCapInsets:UIEdgeInsetsMake

[[UIActivityIndicatorView appearance] setColor:[UIColor redColor]];

UIImage *navBarImage = [UIImage imageNamed:@"navbar"]; navBarImage = [navBarImage resizableImageWithCapInsets:UIEdgeInsetsMake(0, 20.0, 0, 20.0)]; UIImage *navBarLandscapeImage = [UIImage imageNamed:@"navbar-landscape"]; navBarLandscapeImage = [navBarLandscapeImage resizableImageWithCapInsets:UIEdgeInsetsMake(0, 20.0, 0, 20.0)];

http://useyourloaf.com/blog/2012/08/24/using-appearance-proxy-to-style-apps.html

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Passing parameters to callback method

function tryMe (param1, param2) { alert (param1 + " and " + param2); } function callbackTester (callback) { callback(); } callbackTester(tryMe.bind(null, "hello", "goodbye"));

http://stackoverflow.com/questions/3458553/javascript-passing-parameters-to-a-callback-function

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GIT XCode conflicts and merge

git mergetool git commit http://stackoverflow.com/questions/10568405/failed-xcode-git-merge-is-stuck

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Xcode Debugger: view value of variable

po variableName print variableName

Don't forget to typecast resulted objects to access their property values.

http://stackoverflow.com/questions/4735156/xcode-debugger-view-value-of-variable

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jQuery how to find an element based on a data-attribute value?

$("ul").find("[data-slide='" + current + "']");

http://stackoverflow.com/questions/4191386/jquery-how-to-find-an-element-based-on-a-data-attribute-value

http://api.jquery.com/attribute-equals-selector/