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Best way to store a key=>value array in JavaScript?
...lue for a Map.
You can get the size of a Map easily while you have to manually keep track of size for an Object.
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@Html.HiddenFor does not work on Lists in ASP.NET MVC
...st with jQuery which makes an array unsuitable for expansion later on. Normally you would use
13 Answers
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Java executors: how to be notified, without blocking, when a task completes?
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Define a callback interface to receive whatever parameters you want to pass along in the completion notification. Then invoke it at the end of the task.
You could even write a general wrapper for Runnable tasks, and submit these to E...
How to do a Jquery Callback after form submit?
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And if the <form> is submited usually ? (I mean not with Ajax) What can I put in the first argument of .bind() ? EDIT : well, I guess click. Nvm, sorry. :p
– 4wk_
Feb 4 '13 at 13:32
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Format floats with standard json module
...loat class in Tom Wuttke's answer works, but only if %g encoding works globally for your application. The %.15g is a bit magic, it works because float precision is 17 significant digits and %g does not print trailing zeroes.
I spent some time trying to make a PrettyFloat that allowed customization ...
Textarea onchange detection
...that you should be using keyup, not keydown for this: keydown seems to be called before the change is actually made to the textarea, so you'll be using the wrong length (and you don't really know how off you are: could be typing or deleting, and could have text selected meaning it's more than just +...
Can I hide the HTML5 number input’s spin box?
...e: textfield;
}
In some cases, you may want the spinner to be hidden initially, and then appear on hover/focus. (This is currently the default behavior in Chrome). If so, you can use the following:
input[type="number"] {
-moz-appearance: textfield;
}
input[type="number"]:hover,
input[type="...
Ruby on Rails - Import Data from a CSV file
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The smarter_csv gem was specifically created for this use-case: to read data from CSV file and quickly create database entries.
require 'smarter_csv'
options = {}
SmarterCSV.process('input_file.csv', options) do |chunk|
chunk.each do |data_hash|
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SQL query for today's date minus two months
I want to select all the records in a table where their date of entry is older then 2 months.
5 Answers
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How to specify data attributes in razor, e.g., data-externalid=“23151” on @this.Html.CheckBoxFor(…)
...heckBox",
data_externalid = "23521"
}
)
The _ will automatically be converted to - in the resulting markup:
<input type="checkbox" name="MyModel.MyBoolProperty" data-externalid="23521" class="myCheckBox" />
And that's true for all Html helpers taking a htmlAttributes anonymou...