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Why is creating a Thread said to be expensive?
The Java tutorials say that creating a Thread is expensive. But why exactly is it expensive? What exactly is happening when a Java Thread is created that makes its creation expensive? I'm taking the statement as true, but I'm just interested in mechanics of Thread creation in JVM.
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Create an empty list in python with certain size
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You cannot assign to a list like lst[i] = something, unless the list already is initialized with at least i+1 elements. You need to use append to add elements to the end of the list. lst.append(something).
(You could use the assignment notation if you were using a diction...
Use JavaScript to place cursor at end of text in text input element
...ay (and I presume simplest way) to place the cursor at the end of the text in a input text element via JavaScript - after focus has been set to the element?
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Extracting bits with a single multiplication
I saw an interesting technique used in an answer to another question , and would like to understand it a little better.
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Conditionally start at different places in storyboard from AppDelegate
I have a storyboard set up with working login and main view controller, the latter is the view controller to which the user is navigated to when login is successful.
My objective is to show the main view controller immediately if the authentication (stored in keychain) is successful, and show the lo...
Python string class like StringBuilder in C#?
Is there some string class in Python like StringBuilder in C#?
8 Answers
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What does 'low in coupling and high in cohesion' mean
I have problems understanding the statement low in coupling and high in cohesion . I have googled and read a lot about this, but still finding it hard to understand.
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When to use “ON UPDATE CASCADE”
...CASCADE" regularly but I never use "ON UPDATE CASCADE" as I am not so sure in what situation it will be useful.
7 Answers
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Ukkonen's suffix tree algorithm in plain English
I feel a bit thick at this point. I've spent days trying to fully wrap my head around suffix tree construction, but because I don't have a mathematical background, many of the explanations elude me as they start to make excessive use of mathematical symbology. The closest to a good explanation that ...
Why does one often see “null != variable” instead of “variable != null” in C#?
In c#, is there any difference in the excecution speed for the order in which you state the condition?
9 Answers
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