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UINavigationBar custom back button without title
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It's actually pretty easy, here is what I do:
Objective C
// Set this in every view controller so that the back button displays back instead of the root view controller name
self.navigationItem.backBarButtonItem = [[UIBarButtonItem ...
Collisions when generating UUIDs in JavaScript?
...rom Math.random(). For some browsers the entropy is as low as just 41 bits all together. Calling Math.random() multiple times won't raise the entropy. If you really want unique v4 UUIDs you need to use a cryptographically strong RNG that produces at least 122bit entropy per UUID generated.
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Add timestamps to an existing table
..._table block. You can add these columns by specifying the column types manually:
class AddTimestampsToUser < ActiveRecord::Migration
def change_table
add_column :users, :created_at, :datetime, null: false
add_column :users, :updated_at, :datetime, null: false
end
end
While this do...
if else statement in AngularJS templates
...ary operator as follows:
<span>{{isLarge ? 'video.large' : 'video.small'}}</span>
2. ng-switch directive:
can be used something like the following.
<div ng-switch on="video">
<div ng-switch-when="video.large">
<!-- code to render a large video block-->
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How to allow only numeric (0-9) in HTML inputbox using jQuery?
...am creating a web page where I have an input text field in which I want to allow only numeric characters like (0,1,2,3,4,5...9) 0-9.
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Drawing an SVG file on a HTML5 canvas
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EDIT Dec 16th, 2019
Path2D is supported by all major browsers now
EDIT November 5th, 2014
You can now use ctx.drawImage to draw HTMLImageElements that have a .svg source in some but not all browsers. Chrome, IE11, and Safari work, Firefox works with some bugs (but nig...
Python string prints as [u'String']
This will surely be an easy one but it is really bugging me.
10 Answers
10
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What is the largest TCP/IP network port number allowable for IPv4?
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@JessieArr in both those cases it's not really a 65536 issue, it's an issue of A)programs not releasing connections, leaving them in a "WAIT" state that netstat shows combined with B)some earlier windows versions only going from 1024-5000 for dynamic ports.And even t...
Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine
...lution for this problem. The issue I described in my question occured basically due to the incompatibility of the Microsoft.Jet.OLEDB.4.0 driver in 64 bit OS.
So if we are using Microsoft.Jet.OLEDB.4.0 driver in a 64 bit server, we have to force our application to build in in 32 bit mode (This is ...
Switch on Enum in Java [duplicate]
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You actually can switch on enums, but you can't switch on Strings until Java 7. You might consider using polymorphic method dispatch with Java enums rather than an explicit switch. Note that enums are objects in Java, not just symbol...