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Get User's Current Location / Coordinates
...list file
<key>NSLocationWhenInUseUsageDescription</key>
<string>Description</string>
<key>NSLocationAlwaysAndWhenInUseUsageDescription</key>
<string>Description</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>Descrip...
Ruby on Rails: how to render a string as HTML?
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What's happening is that, as a security measure, Rails is escaping your string for you because it might have malicious code embedded in it. But if you tell Rails that your string is html_safe, it'll pass it right through.
@str = "<b>Hi</b>".html_safe
<%= @str %>
OR
@str = "&...
How to get the first word of a sentence in PHP?
I want to extract the first word of a variable from a string. For example, take this input:
22 Answers
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Using .NET, how can you find the mime type of a file based on the file signature not the extension
... System.UInt32 pBC,
[MarshalAs(UnmanagedType.LPStr)] System.String pwzUrl,
[MarshalAs(UnmanagedType.LPArray)] byte[] pBuffer,
System.UInt32 cbSize,
[MarshalAs(UnmanagedType.LPStr)] System.String pwzMimeProposed,
System.UInt32 dwMimeFlags,
out Sy...
Adding a column to an existing table in a Rails migration
...enerate a new migration (rails generate migration add_email_to_users email:string will do the trick).
It will create a migration file containing line:
add_column :users, email, string
Then do a rake db:migrate and it'll run the new migration, creating the new column.
If you have not yet run the ori...
When to use ' (or quote) in Lisp?
... as their values, and markers where you in other languages would have used strings, such as keys to hash tables.
This is where quote comes in. Say you want to plot resource allocations from a Python application, but rather do the plotting in Lisp. Have your Python app do something like this:
pri...
How to concatenate two numbers in javascript?
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Use "" + 5 + 6 to force it to strings. This works with numerical variables too:
var a = 5;
var b = 6;
console.log("" + a + b);
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impro...
Python TypeError: not enough arguments for format string
Here's the output. These are utf-8 strings I believe... some of these can be NoneType but it fails immediately, before ones like that...
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How to concatenate columns in a Postgres SELECT?
I have two string columns a and b in a table foo .
8 Answers
8
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A Java collection of value pairs? (tuples?)
... where you can define the types of each entry in the map, for example <String, Integer> .
19 Answers
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