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How does type Dynamic work and how to use it?
I heard that with Dynamic it is somehow possible to do dynamic typing in Scala. But I can't imagine how that might look like or how it works.
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Can I get “&&” or “-and” to work in PowerShell?
&& is notoriously hard to search for on Google Search, but the best I've found is this article which says to use -and .
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SVN: Is there a way to mark a file as “do not commit”?
With TortoiseSVN, I can move a file into the ignore-on-commit changelist, so that when I commit a whole tree, changes to that file do not get committed.
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When to use RSpec let()?
...ss my examples. I recently came upon let() . According to RSpec docs, it is used to
10 Answers
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How to prevent rm from reporting that a file was not found?
...imes the files are not present, so it reports many errors. I do not need this message. I have searched the man page for a command to make rm quiet, but the only option I found is -f , which from the description, "ignore nonexistent files, never prompt", seems to be the right choice, but the name ...
UITextField text change event
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I catch the characters sent to a UITextField control something like this:
// Add a "textFieldDidChange" notification method to the text field control.
In Objective-C:
[textField addTarget:self
action:@selector(textFieldDidChange:)
forControlEvents:UIControlEventEditingC...
Is there an alternative to string.Replace that is case-insensitive?
...me% and %PolicyAmount% with a value pulled from a database. The problem is the capitalization of FirstName varies. That prevents me from using the String.Replace() method. I've seen web pages on the subject that suggest
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Android: ProgressDialog.show() crashes with getApplicationContext
I can't seem to grasp why this is happening. This code:
18 Answers
18
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What is the difference between a pseudo-class and a pseudo-element in CSS?
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The CSS 3 selector recommendation is pretty clear about both, but I'll try to show the differences anyway.
Pseudo-classes
Official description
The pseudo-class concept is introduced to permit selection based on information that lies outside of the docum...
Should each and every table have a primary key?
... does not need a primary key, rethink your design: most probably, you are missing something. Why keep identical records?
In MySQL, the InnoDB storage engine always creates a primary key if you didn't specify it explicitly, thus making an extra column you don't have access to.
Note that a primary ...