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What are best practices that you use when writing Objective-C and Cocoa? [closed]
...ot think are standard:
1) With the advent of properties, I no longer use "_" to prefix "private" class variables. After all, if a variable can be accessed by other classes shouldn't there be a property for it? I always disliked the "_" prefix for making code uglier, and now I can leave it out.
2...
How can I create a UILabel with strikethrough text?
...for strikethrough Enable/Disable.
extension UILabel {
func strikeThrough(_ isStrikeThrough:Bool) {
if isStrikeThrough {
if let lblText = self.text {
let attributeString = NSMutableAttributedString(string: lblText)
attributeString.addAttribute(NSAttributedString...
Sorting an array of objects in Ruby by object attribute?
...
I recommend using sort_by instead:
objects.sort_by {|obj| obj.attribute}
Especially if attribute may be calculated.
Or a more concise approach:
objects.sort_by(&:attribute)
...
Changing the maximum length of a varchar column?
...
You need
ALTER TABLE YourTable ALTER COLUMN YourColumn <<new_datatype>> [NULL | NOT NULL]
But remember to specify NOT NULL explicitly if desired.
ALTER TABLE YourTable ALTER COLUMN YourColumn VARCHAR (500) NOT NULL;
If you leave it unspecified as below...
ALTER TABLE Your...
How to construct a std::string from a std::vector?
...in VS2013 which asserts at runtime about invalid iterators, unless you set _ITERATOR_DEBUG_LEVEL=1 (in which case it seems to work fine).
– Cameron
Sep 23 '14 at 22:39
add a c...
Bundler: Command not found
...t found: bundle
λ ruby -v
ruby 1.9.3p484 (2013-11-22 revision 43786) [x86_64-linux]
### Notice the system Ruby version isn't included in chruby
λ chruby
ruby-1.9.3-p551
ruby-2.1.2
ruby-2.2.1
### Select a version via your version manager
λ chruby 1.9.3
### Ensure your version manager p...
See :hover state in Chrome Developer Tools
...t not if you make changes onhover using JS.
– matthew_360
Feb 6 '15 at 16:31
Here's a quick video I threw together dem...
SVN: Is there a way to mark a file as “do not commit”?
...nore-on-commit is already defined. tortoisesvn.net/docs/release/TortoiseSVN_en/…
– tjmoore
Jun 19 '12 at 8:50
...
Get the date (a day before current time) in Bash
... a one-liner, so cut and paste should work -- no line endings assumed. date_days_past () { days_past=${1:-0}; if ! date -v-${days_past}d +%Y%m%d 2>/dev/null; then date --date="-${days_past} day" +%Y%m%d; fi }
– Noah Spurrier
May 16 '16 at 21:29
...
How to remove all the occurrences of a char in c++ string
...on for you, like:
#include <boost/algorithm/string.hpp>
boost::erase_all(str, "a");
All of this is well-documented on reference websites. But if you didn't know of these functions, you could easily do this kind of things by hand:
std::string output;
output.reserve(str.size()); // optional,...