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What is the AppDelegate for and how do I know when to use it?
I'm just beginning to work on iPhone apps. How do I know when I should be putting stuff in AppDelegate versus a custom class? Is there a rule or any type of analogy with another programming language like Python or PHP that uses an AppDelegate like pattern?
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How are software license keys generated?
...cto-standard as an anti-piracy measure. To be honest, this strikes me as (in)Security Through Obscurity , although I really have no idea how license keys are generated. What is a good (secure) example of license key generation? What cryptographic primitive (if any) are they using? Is it a message d...
How to make HTML input tag only accept numerical values?
I need to make sure that a certain <input> field only takes numbers as value.
The input is not part of a form. Hence it doesn't get submitted, so validating during submission is not an option. I want the user to be unable to type in any characters other than numbers.
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How do I recover/resynchronise after someone pushes a rebase or a reset to a published branch?
...ver, I have not seen any recipes posted for how to deal with the situation in case a rebase is published.
3 Answers
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WPF Textblock, linebreak in Text attribute
Is there a way to have \n make a line break in a TextBlock ?
14 Answers
14
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How can I get the intersection, union, and subset of arrays in Ruby?
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Utilizing the fact that you can do set operations on arrays by doing &(intersection), -(difference), and |(union).
Obviously I didn't implement the MultiSet to spec, but this should get you started:
class MultiSet
attr_acce...
Returning a boolean from a Bash function
I want to write a bash function that check if a file has certain properties and returns true or false. Then I can use it in my scripts in the "if". But what should I return?
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document.getElementById vs jQuery $()
... DOM Object
var contents = $('#contents'); //returns a jQuery Object
In jQuery, to get the same result as document.getElementById, you can access the jQuery Object and get the first element in the object (Remember JavaScript objects act similar to associative arrays).
var contents = $('#conte...
How do I move the turtle in LOGO? [closed]
How do I move the turtle in LOGO ?
6 Answers
6
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Vim: Delete buffer without losing the split window
...ete]" command), it not only deletes the buffer but also removes the split window that buffer was in.
7 Answers
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