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What does a space mean in a CSS selector? i.e. What is the difference between .classA.classB and .cl
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.classA.classB refers to an element that has both classes A and B (class="classA classB"); whereas .classA .classB refers to an element with class="classB" descended from an element with class="classA".
Edit: Spec for reference: Attribute Selectors (See section 5.8.3 Class Selectors)...
How to scroll HTML page to given anchor?
... answered Jul 3 '10 at 1:24
Armando Pérez MarquésArmando Pérez Marqués
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What is the instanceof operator in JavaScript?
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instanceof
The Left Hand Side (LHS) operand is the actual object being tested to the Right Hand Side (RHS) operand which is the actual constructor of a class. The basic definition is:
Checks the current object and returns true if the object
is o...
Check if a temporary table exists and delete if it exists before creating a temporary table
I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
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Using numpad in Vi (Vim) via PuTTY
...e using vi [Cialug]:
In the configuration, go to Terminal->Features and check "Disable
application keypad mode". Save the settings and enjoy a numeric pad
that works!
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How to use HTML to print header and footer on every printed page of a document?
Is it possible to print HTML pages with custom headers and footers on each printed page?
17 Answers
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Threading in a PyQt application: Use Qt threads or Python threads?
...humb might be to use QThreads if you're going to interact somehow with Qt, and use Python threads otherwise.
And some earlier comment on this subject from PyQt's author: "they are both wrappers around the same native thread implementations". And both implementations use GIL in the same way.
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What is meant by the term “hook” in programming?
...Would someone be able to give me an idea of what this term generally means and perhaps a small example to illustrate the definition?
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PHP case-insensitive in_array function
...^'.preg_quote($needle).'/$',$a)>0). Not so elegant, then. (Notice the ^ and $ characters are required, unless partial matching is desired.) However if you actually want the matching entries returned, I like this solution.
– Darren Cook
Sep 14 '12 at 6:57
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What does cmd /C mean? [closed]
I can understand cmd but not cmd /c . I was trying to invoke a java program from the current for which I use Runtime.getRuntime().exec("cmd /C java helloworld"); There arises my doubt.
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