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Set every cell in matrix to 0 if that row or column contains a 0
Given a NxN matrix with 0s and 1s. Set every row that contains a 0 to all 0 s and set every column that contains a 0 to all 0 s.
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Get an object properties list in Objective-C
...turn nil;
}
NSMutableDictionary *results = [[[NSMutableDictionary alloc] init] autorelease];
unsigned int outCount, i;
objc_property_t *properties = class_copyPropertyList(klass, &outCount);
for (i = 0; i < outCount; i++) {
objc_property_t property = properties[i...
Array extension to remove object by value
...with a protocol extension method.
removeObject() is defined as a method on all types conforming
to RangeReplaceableCollectionType (in particular on Array) if
the elements of the collection are Equatable:
extension RangeReplaceableCollectionType where Generator.Element : Equatable {
// Remove f...
The communication object, System.ServiceModel.Channels.ServiceChannel, cannot be used for communicat
What is this error all about, and how would I go about solving it?
14 Answers
14
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Get keys from HashMap in Java
...HashMap contains more than one key. You can use keySet() to get the set of all keys.
team1.put("foo", 1);
team1.put("bar", 2);
will store 1 with key "foo" and 2 with key "bar". To iterate over all the keys:
for ( String key : team1.keySet() ) {
System.out.println( key );
}
will print "foo"...
C++ - passing references to std::shared_ptr or boost::shared_ptr
...now that sp->do_something() will not blow up due to a null pointer?
It all depends what is in those '...' sections of the code. What if you call something during the first '...' that has the side-effect (somewhere in another part of the code) of clearing a shared_ptr to that same object? And wha...
Is there any “font smoothing” in Google Chrome?
...e that explains it clearly and the few snippets I have found don't work at all.
5 Answers
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What is an example of the Liskov Substitution Principle?
...the abstraction of having Square inherit from Rectangle is a bad one.
Y'all should check out the other priceless SOLID Principles Motivational Posters.
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What is the use of the @ symbol in PHP?
...om error handler function with set_error_handler() then it will still get called, but this custom error handler can (and should) call error_reporting() which will return 0 when the call that triggered the error was preceded by an @...
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Why can't I reference my class library?
... Then Microsoft should say this and include an option to put them all at the same version.
– PRMan
Apr 30 '17 at 23:12
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