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Check if a string matches a regex in Bash script
One of the arguments that my script receives is a date in the following format: yyyymmdd .
5 Answers
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How expensive is RTTI?
I understand that there is a resource hit from using RTTI, but how big is it? Everywhere I've looked just says that "RTTI is expensive," but none of them actually give any benchmarks or quantitative data reguarding memory, processor time, or speed.
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AES vs Blowfish for file encryption
I want to encrypt a binary file. My goal is that to prevent anyone to read the file who doesn't have the password.
7 Answer...
What is a clearfix?
...uts.
It's worth noting that today, the use of floated elements for layout is getting more and more discouraged with the use of better alternatives.
display: inline-block - Better
Flexbox - Best (but limited browser support)
Flexbox is supported from Firefox 18, Chrome 21, Opera 12.10, and Inter...
The term “Context” in programming? [closed]
I have been programming for some months now and a frequently used word is "context" in classes. Like ServletContext (Java), Activity (Android), Service (Java, Android), NSManagedContext (Objective-C, iOS).
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Thread context switch Vs. process context switch
Could any one tell me what is exactly done in both situations? What is the main cost each of them?
10 Answers
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What are all the common undefined behaviours that a C++ programmer should know about? [closed]
...ffer overflows
Reading or writing to an object or array at an offset that is negative, or beyond the size of that object (stack/heap overflow)
Integer Overflows
Signed integer overflow
Evaluating an expression that is not mathematically defined
Left-shifting values by a negative amount (right shi...
What is the difference between a weak reference and an unowned reference?
...revent ARC from deallocating the referred object).
But why two keywords? This distinction has to do with the fact that Optional types are built-in the Swift language. Long story short about them: optional types offer memory safety (this works beautifully with Swift's constructor rules - which are st...
How can I use pointers in Java?
...rs, but I heard that Java programs can be created with pointers and that this can be done by the few who are experts in java. Is it true?
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How do I iterate over a range of numbers defined by variables in Bash?
How do I iterate over a range of numbers in Bash when the range is given by a variable?
20 Answers
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