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Is null check needed before calling instanceof?
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@BenThurley - The behavior is guaranteed by Java specifications past and present. I think Luke's point addresses the limitations of experimentation in determining the guaranteed behavior of the present.
– Andy Thomas
Aug 3 '15 ...
How to get all Errors from ASP.Net MVC modelState?
...e key of the modelstate too (i.e. the name of the field). you can get that by changing the first line to this: foreach (KeyValuePair<string, ModelState> kvp in htmlHelper.ViewData.ModelState) { and insert this line below it: var modelState = kvp.Value;. You can get the key from kvp.Key
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How to detect escape key press with pure JS or jQuery?
...e your logic here.
}
}
Code Snippet:
var msg = document.getElementById('state-msg');
document.body.addEventListener('keypress', function(e) {
if (e.key == "Escape") {
msg.textContent += 'Escape pressed:'
}
});
Press ESC key <span id="state-msg"></span>
keyCode i...
Convert duration to hours:minutes:seconds (or similar) in Rails 3 or Ruby
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See: http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html
distance_of_time_in_words(3600)
=> "about 1 hour"
share
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im...
How to parse JSON to receive a Date object in JavaScript?
...ar when you have a very old DateTime (before the Epoch) that was converted by .NET to JSON.
– ClearCloud8
Jan 30 '14 at 21:37
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Is there a way to auto expand objects in Chrome Dev Tools?
... a solution (uses the underscore.js library) that solves both of the above by creatively (ab)using console.group:
expandedLog = (function(){
var MAX_DEPTH = 100;
return function(item, depth){
depth = depth || 0;
if (depth > MAX_DEPTH ) {
console.log(item);
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A route named “x” is already in the route collection. Route names must be unique. Exception with ASP
...error can occur due to multiple causes, I had the same error and solved it by modifying the Global.asax class.
The Application_Start method at Global.asax.cs was like:
protected void Application_Start()
{
AreaRegistration.RegisterAllAreas();
RouteConfig.RegisterRoutes(RouteTable.Routes);
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How can I use functional programming in the real world? [closed]
Functional languages are good because they avoid bugs by eliminating state, but also because they can be easily parallelized automatically for you, without you having to worry about the thread count.
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How to add leading zeros for for-loop in shell? [duplicate]
I have a basic number for loop which increments the variable num by 1 over each iteration...
7 Answers
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Rails migration for change column
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As I found by the previous answers, three steps are needed to change the type of a column:
Step 1:
Generate a new migration file using this code:
rails g migration sample_name_change_column_type
Step 2:
Go to /db/migrate folder a...