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What's the best way to learn LISP? [closed]
I have been programming in Python, PHP, Java and C for a couple or years now, and I just finished reading Hackers and Painters, so I would love to give LISP a try!
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How does virtual inheritance solve the “diamond” (multiple inheritance) ambiguity?
...ally inherit A. D's object size is increased because it stores 2 pointers now; however there is only one A now.
So B::A and C::A are the same and so there can be no ambiguous calls from D. If you don't use virtual inheritance you have the second diagram above. And any call to a member of A the...
UINavigationBar custom back button without title
...evious view controller). The newly pushed view controller back button will now show whatever you put for initWithTitle, which in this case is an empty string.
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nuget 'packages' element is not declared warning
...onfig file (add xmlns attribute):
<packages xmlns="urn:packages">
Now the warning should disappear (even if packages.config file is open in Visual Studio).
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Print in one line dynamically
...sh() forces a file to send whatever it's got to the operating system right now. I'm surprised it works for you without that -- it didn't work for me until I added it.
– zwol
Jul 15 '10 at 18:38
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UITableViewCell Separator disappearing in iOS7
...s not shown!
I overrode layoutSubviews in my UITableViewCell subclass and now the separators are displayed reliably:
Objective-C:
- (void)layoutSubviews {
[super layoutSubviews];
for (UIView *subview in self.contentView.superview.subviews) {
if ([NSStringFromClass(subview.class) ...
Accept function as parameter in PHP
...nswer, but wanted to find some documentation to link to first, and didn't know what it was called exactly. Ah well, now I'll know for when I need to do this as well. Thanks.
– Rob
Apr 23 '10 at 17:01
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How do you automatically set the focus to a textbox when a web page loads?
...vaScript when you don't want to support older browsers.
Edit 2: Firefox 4 now supports the autofocus attribute, just leaving IE without support.
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Error on pod install
I have a working project the uses a pod file for some weeks now. When I learned that some of my pods have update I tried to 'pod install' on got this weird error
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What is the official “preferred” way to install pip and virtualenv systemwide?
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If you can install the latest Python (2.7.9 and up) Pip is now bundled with it.
See: https://docs.python.org/2.7//installing/index.html
If not :
Update (from the release notes):
Beginning with v1.5.1, pip does not require setuptools prior to running get-pip.py. Additionally, if ...