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How to avoid 'cannot read property of undefined' errors?
...tive "in", but allows paths.
var testObject = {a: {b: {c: 'walrus'}}};
if(_.has(testObject, 'a.b.c')) {
//Safely access your walrus here
}
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f...
Why does sudo change the PATH?
... Don't alias sudo; see answer from @Jacob about Defaults env_reset.
– greg_1_anderson
Aug 19 '12 at 18:35
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What happened to “HelveticaNeue-Italic” on iOS 7.0.3
...f (font == nil && ([UIFontDescriptor class] != nil)) {
font = (__bridge_transfer UIFont*)CTFontCreateWithName(CFSTR("HelveticaNeue-Italic"), size, NULL);
}
It is also worth noting that in the current version of Xcode (5.0.1 (5A2053)) this font is not listed as an option in the Font dro...
std::unique_lock or std::lock_guard?
...
The difference is that you can lock and unlock a std::unique_lock. std::lock_guard will be locked only once on construction and unlocked on destruction.
So for use case B you definitely need a std::unique_lock for the condition variable. In case A it depends whether you need to relo...
Single Page Application: advantages and disadvantages [closed]
...ript handle it. this is great advantage to where I had to guess time zones based on location derived from users IP.
to me state is more nicely maintained in an SPA because once you have set a variable you know it will be there. this gives a feel of developing an app rather than a web page. this hel...
Is there any algorithm in c# to singularize - pluralize a word?
...
I whipped one together based on the Rails pluralizer. You can see my blog post here, or on github here
output = Formatting.Pluralization(100, "sausage");
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Capture Image from Camera and Display in Activity
...ass MyCameraActivity extends Activity
{
private static final int CAMERA_REQUEST = 1888;
private ImageView imageView;
private static final int MY_CAMERA_PERMISSION_CODE = 100;
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceSta...
How can I properly handle 404 in ASP.NET MVC?
...c string ReferrerUrl { get; set; }
}
#endregion
}
Step 2: Use a base Controller class so you can easily invoke your custom 404 action and wire up HandleUnknownAction
404s in ASP.NET MVC need to be caught at a number of places. The first is HandleUnknownAction.
The InvokeHttp404 method c...
How do I log errors and warnings into a file?
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Use the following code:
ini_set("log_errors", 1);
ini_set("error_log", "/tmp/php-error.log");
error_log( "Hello, errors!" );
Then watch the file:
tail -f /tmp/php-error.log
Or update php.ini as described in this blog entry from 2008.
...
Why would a JavaScript variable start with a dollar sign? [duplicate]
...; // refers to the jQuery object representation of the dom object
var email_field = $("#email").get(0); // refers to the dom object itself
I find this to be very helpful in writing jQuery code and makes it easy to see jQuery objects which have a different set of properties.
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