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When and why will a compiler initialise memory to 0xCD, 0xDD, etc. on malloc/free/new/delete?
...e compiler will sometimes initialize memory with certain patterns such as 0xCD and 0xDD . What I want to know is when and why this happens.
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Difference between malloc and calloc?
...em with virtual memory.)
Some compilers even can optimize malloc + memset(0) into calloc for you, but you should use calloc explicitly if you want the memory to read as 0.
If you aren't going to ever read memory before writing it, use malloc so it can (potentially) give you dirty memory from its i...
Auto margins don't center image in page
...his example the image is not centered. Why? My browser is Google Chrome v10 on windows 7, not IE.
9 Answers
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LINQ .Any VS .Exists - What's the difference?
... conditions defined by the specified predicate.
This exists since .NET 2.0, so before LINQ. Meant to be used with the Predicate delegate, but lambda expressions are backward compatible. Also, just List has this (not even IList)
IEnumerable.Any (Extension method - MSDN)
Determines whether a...
Pointers vs. values in parameters and return values
... value receivers. As something nearer an upper bound, bytes.Replace takes 10 words' worth of args (three slices and an int). You can find situations where copying even large structs turns out a performance win, but the rule of thumb is not to.
For slices, you don't need to pass a pointer to change...
Filtering by Multiple Specific Model Properties in AngularJS (in OR relationship)
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edited Mar 22 '17 at 15:04
Mistalis
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answered...
String's Maximum length in Java - calling length() method
...way the internal data representation is implemented for Strings), Chapter 10: Arrays of The Java Language Specification, Java SE 7 Edition says the following:
The variables contained in an array
have no names; instead they are
referenced by array access expressions
that use nonnegative int...
How to include PHP files that require an absolute path?
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answered Aug 7 '08 at 4:20
Peter CoultonPeter Coulton
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Converting JavaScript object with numeric keys into array
..., in that case a run through JSON.parse would be necessary as well.
In ES2015 there's Object.values to the rescue, which makes this a breeze
var arr = Object.values(obj);
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