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Convert int to ASCII and back in Python
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ASCII to int:
ord('a')
gives 97
And back to a string:
in Python2: str(unichr(97))
in Python3: chr(97)
gives 'a'
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How to debug PDO database queries?
Before moving to PDO, I created SQL queries in PHP by concatenating strings. If I got database syntax error, I could just echo the final SQL query string, try it myself on the database, and tweak it until I fixed the error, then put that back into the code.
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Rails 4: List of available datatypes
...:date
:datetime
:decimal
:float
:integer
:bigint
:primary_key
:references
:string
:text
:time
:timestamp
Source: http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_column
These are the same as with Rails 3.
If you use PostgreSQL, you can also tak...
How do I determine whether an array contains a particular value in Java?
I have a String[] with values like so:
29 Answers
29
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phantomjs not waiting for “full” page load
...ascript condition that evaluates to a boolean,
* it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible')" or
* as a callback function.
* @param onReady what to do when testFx condition is fulfilled,
* it can be passed in as a string (e.g.: "1 == 1" or "$('#bar').is(':visible...
Passing parameters to JavaScript files
...d a CSP (content security policy). We use a lot of scripts wherein we pass strings determined from language resources and API keys etc. into JS files.
– monkeySeeMonkeyDo
Sep 16 '19 at 14:24
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Search and replace in Vim across all the project files
...his in two simple commands using whatever grep tool you have installed. No extra plugins required!:
1. :grep <search term>
2. :cdo %s/<search term>/<replace term>/gc
3. (If you want to save the changes in all files) :cdo update
(cdo executes the given command to each term in the...
right click context menu for datagridview
...ntMouseOverRow >= 0)
{
m.MenuItems.Add(new MenuItem(string.Format("Do something to row {0}", currentMouseOverRow.ToString())));
}
m.Show(dataGridView1, new Point(e.X, e.Y));
}
}
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Count the number of occurrences of a string in a VARCHAR field?
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The ROUND here is unnecessary. assume a string of length x with n occurrences of'value. LENGTH(description) - LENGTH( REPLACE ( description, "value", "") ) will always give you n*length("value"), diving that by length of value will always leave a whole number n. N...
How to launch Safari and open URL from iOS app
...:(id)sender {
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://www.daledietrich.com"]];
}
Swift
(IBAction in viewController, rather than header file)
if let link = URL(string: "https://yoursite.com") {
UIApplication.shared.open(link)
}
...