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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...s after the Ruby initialize. Hence it is run every time a record is loaded from the database and used to create a new model object in memory, so don't use this callback if what you want is just to set default values the first time you add a new record. If you want to do that, use before_create and n...
Easiest way to convert int to string in C++
What is the easiest way to convert from int to equivalent string in C++. I am aware of two methods. Is there any easier way?
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Ruby/Rails: converting a Date to a UNIX timestamp
How would I get a UNIX timestamp (number of seconds since 1970 GMT) from a Date object in a Rails app?
5 Answers
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Does it make sense to use “as” instead of a cast even if there is no null check? [closed]
... is+cast is enough to trigger a "Do not cast unnecessarily" warning from FxCop: msdn.microsoft.com/en-us/library/ms182271.aspx That should be enough reason to avoid the construct.
– David Schmitt
Jan 27 '10 at 16:47
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Web API 最佳入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... self.remove = function (product) {
// First remove from the server, then from the UI
$.ajax({ type: "DELETE", url: baseUri + '/' + product.Id })
.done(function () { self.products.remove(product); });
}
$.getJSON(baseUr...
Underscore: sortBy() based on multiple attributes
...de below I create a new array of patients sorted by Name within RoomNumber from the original array called patients.
var sortedPatients = _.chain(patients)
.sortBy('Name')
.sortBy('RoomNumber')
.value();
share
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How do I loop through or enumerate a JavaScript object?
... that the key you get is an actual property of an object, and doesn't come from the prototype.
Here is the snippet:
var p = {
"p1": "value1",
"p2": "value2",
"p3": "value3"
};
for (var key in p) {
if (p.hasOwnProperty(key)) {
console.log(key + " -> " + p[key]...
Git SVN error: a Git process crashed in the repository earlier
I was just trying to commit changes to the Git master. From what I have read, it seems that the idea is to delete the lock file. The message says:
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Possible to access the index in a Hash each loop?
...of Enumerable. But too bad that RDoc can't cross reference each_with_index from Hash.html.
– Upgradingdave
Jan 18 '10 at 2:50
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Access lapply index names inside FUN
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You could try using imap() from purrr package.
From the documentation:
imap(x, ...) is short hand for map2(x, names(x), ...) if x has names, or map2(x, seq_along(x), ...) if it does not.
So, you can use it that way :
library(purrr)
myList <-...