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How to avoid 'cannot read property of undefined' errors?
...ains a property.
The easiest way is to use the in operator.
window.a = "aString";
//window should have 'a' property
//lets test if it exists
if ("a" in window){
//true
}
if ("b" in window){
//false
}
Of course you can nest this as deep as you want
if ("a" in window.b.c) { }
Not su...
How to add an empty column to a dataframe?
...at is that datatype for C? I am trying to add by looping through a list of strings. But it does not use it.
– eleijonmarck
Oct 24 '17 at 11:04
add a comment
...
Calculate date/time difference in java [duplicate]
...this for a friendly representation of time differences (in milliseconds):
String friendlyTimeDiff(long timeDifferenceMilliseconds) {
long diffSeconds = timeDifferenceMilliseconds / 1000;
long diffMinutes = timeDifferenceMilliseconds / (60 * 1000);
long diffHours = timeDifferenceMillisec...
ng-repeat :filter by single field
...hing like substr That means you want select product where "color" contains string "blue" and not where "color" is "blue".
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Is there a way to check if WPF is currently executing in design mode or not?
...e)
{
//Add fake data for design-time only here:
//SomeStringItems = new List<string>
//{
// "Item 1",
// "Item 2",
// "Item 3"
//};
}
}
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...
Clearing localStorage in javascript?
...unctions in a similar fashion to objects in that the keys are converted to strings. For example, using undefined as a key like this: localStorage.setItem(undefined, 'example Txt!'), will actuall store it under the key called 'undefined' as you can see when you run the following code. console.log(loc...
How to run two jQuery animations simultaneously?
...
yes, you can eater set queue to true/false, or give it a string (queue-name) this way, both animations use the same timer...
– AlexK
Oct 25 '13 at 11:09
3
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Vim: Close All Buffers But This One
..."$") that returns last buffer number. but I have no idea to interpolate to string when I use like this :1,bufnr("$")bd. Maybe.. best solution would be :1,9999bd.
– Jinyoung Kim
Dec 21 '15 at 16:37
...
Changing UIButton text
...value using its own title values, so that you can set up to four different strings for the four states (normal, highlighted, selected, disabled).
Because of this feature, setting the titleLabel's text directly won't persist, and will be reset by the button when it lays out its subviews.
This is ...
Delete keychain items when an app is uninstalled
...
C# Xamarin version
const string FIRST_RUN = "hasRunBefore";
var userDefaults = NSUserDefaults.StandardUserDefaults;
if (!userDefaults.BoolForKey(FIRST_RUN))
{
//TODO: remove keychain items
userDefaults.SetBool(true, FIRST_...