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Why is char[] preferred over String for passwords?
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Strings are immutable. That means once you've created the String, if another process can dump memory, there's no way (aside from reflection) you can get rid of the data before garbage collection kicks in.
With an array, you can explicitly wipe the data after you're done with it. You can ov...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...he readAgain argument to false means this will only set the default values if this method has never been called in the past so you don't need to worry about overriding the user's settings each time your Activity is created
Take a look into PreferenceManager.setDefaultValues in Android API for furthe...
jQuery $.ajax(), $.post sending “OPTIONS” as REQUEST_METHOD in Firefox
...n policy. It only allows you to do XMLHTTPRequests to your own domain. See if you can use a JSONP callback instead:
$.getJSON( 'http://<url>/api.php?callback=?', function ( data ) { alert ( data ); } );
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What is the difference between an expression and a statement in Python?
In Python, what is the difference between expressions and statements?
14 Answers
14
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STAThread and multithreading
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Apartment threading is a COM concept; if you're not using COM, and none of the APIs you call use COM "under the covers", then you don't need to worry about apartments.
If you do need to be aware of apartments, then the details can get a little complicated; a pro...
Can jQuery get all CSS styles associated with an element?
...i].rules || sheets[i].cssRules;
for (var r in rules) {
if (a.is(rules[r].selectorText)) {
o = $.extend(o, css2json(rules[r].style), css2json(a.attr('style')));
}
}
}
return o;
}
function css2json(css) {
var s = {};
if (!css) re...
Placement of the ng-app directive (html vs body)
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There is no big difference where you put ng-app.
If you put it on <body> then you have a smaller scope for AngularJS which is slightly faster.
But I have used ng-app on the <html> for manipulating the <title>.
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Extracting substrings in Go
...confused by the working of slices and the string storage format, which is different from what you have in C.
any slice in Go stores the length (in bytes), so you don't have to care about the cost of the len operation : there is no need to count
Go strings aren't null terminated, so you don't have ...
How to sort a list in Scala by two fields?
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what if we want to reverse sort on lastName and then natural sort on firstName?
– Sachin K
Jun 18 '14 at 9:19
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Transparent ARGB hex value
...ue").
To keep it simple one chooses black (#00000000) or white (#00FFFFFF) if the color does not matter.
In the table you linked to you'll find Transparent defined as #00FFFFFF.
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