How can I (from a script) add something to the zsh command history?
I'd like to be able to look through my command history and know the context from which I issued various commands--in other words, "what directory was I in?" There are various ways I could achieve this, but all of them (that I can think of) would require manipulating the zsh history to add (for instance) a commented line with the result of $(pwd). (I could create functions named cd & pushd & popd e
What does ":event => :authentication" do?
I just would like to help to figure out the answer. I tracked the source code myself, that help me understand how the :event => :authentication parameter works. I hope it also helps you. So your question is why pass the :event => :authentication to the sign_in_and_redirect method to force all authentication callbacks to be called. then, we can track the definition. # Sign in a user and tries to re
How do I remove emoji from string
My problem is to remove emoji from a string, but not CJK (Chinese, Japanese, Korean) characters from a string using regex. I tried to use this regex: REGEX = /[^\u1F600-\u1F6FF\s]/i This regex works fine except it also detects the Chinese, Japanese and Korean character where I need those characters. Any idea how to solve this issue?
MySQL server start issues on Mavericks
I am having difficulty using MySQL on my MacBook, I am trying to start my server using sudo mysqld_safe and this results in the following output: 140131 00:03:02 mysqld_safe Logging to '/usr/local/var/mysql/david-mbp.err'. 140131 00:03:02 mysqld_safe Starting mysqld daemon with databases from /usr/local/var/mysql 140131 00:03:03 mysqld_safe mysqld from pid file /usr/local/var/mysql/david-mbp.pid e
How to make Ansible execute a shell script if a package is not installed
I don't think the yum module would help in this case. It currently has 3 states: absent, present, and latest. Since it sounds like you don't want to actually install or remove the package (at least at this point) then you would need to do this in two manual steps. The first task would check to see if the package exists, then the second task would invoke a command based on the output of the first c
Customized tableView à la Tweetbot
When the user selects the cell save the the index path of the selected cell and add a row below it. If the user selects the same sell hide the row below it. If the user selects another cell hide the currently selected cell and show a new cell below the newly selected cell. @interface RCTableViewController () @property (nonatomic, strong) NSMutableArray *tableViewData; @property (nonatomic, strong)
Finding index of character in Swift String
It's time to admit defeat... In Objective-C, I could use something like: NSString* str = @"abcdefghi"; [str rangeOfString:@"c"].location; // 2 In Swift, I see something similar: var str = "abcdefghi" str.rangeOfString("c").startIndex ...but that just gives me a String.Index, which I can use to subscript back into the original string, but not extract a location from. FWIW, that String.Index has a p
UILabel sizeToFit doesn't work with autolayout ios6
Please note that in most cases Matt's solution works as expected. But if it doesn't work for you, please, read further. To make your label automatically resize height you need to do following: Set layout constrains for label Set height constraint with low priority. It should be lower than ContentCompressionResistancePriority Set numberOfLines = 0 Set ContentHuggingPriority higher than label's heig
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