Using PHP, is there a function/method/way to check if a variable contains something that would be safe to put into a foreach construct?Something like
If I understand correctly, in Python 2, iter(d.keys()) was the same as d.iterkeys(). But now, d.keys() is a view, which is in between the list and the iterator开发者_如何学Go. What\'s the difference b
Am I correct in thinking that IteratorAggregate only provides array-like read access to开发者_Python百科 an object? If I need to write to the object-as-array, then I need to use Iterator?
[edit: I forgot to mention that it is a JUnit Test Case i am debugging. Is that a problem?] i have a really strange problem in eclipse.
On compiling code at Warning Level 4 (/W4), I get C4996 warnings on std::copy() calls whose parameters are C arrays (not STL containers like vectors). The recommended solution to fix this seems to be
I have a std::map<int,int> lets call it my_map I iterate through this map using iterators and a for loop.
I use Java. I already have a class for a custom object called \"Subject\". I have another class that only contains a Linked List of Subject objects. (called subjectsList)
I have a lot of functions that either have type hinting for arrays or use is_array() to check the array-ness of a variable.
I\'ve read in "Dive into Python 3" that: "The readlines() method now returns an iterator, so it is just as efficient as xreadlines() was in Python 2".
In Python 2, file objects had an xreadlines() method which returned an iterator that would read the file one line at a time. In Python 3, the xreadlines() method no longer exists, and realines() still
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