I have a loop that runs through a data set and determines the folder setup for a href. I have a ng-if for each of the options but I need to add a check to one of the ng-ifs. I need a way to check if a value is null. I have used something like:
ng-if="!shortcut.SAM3Link"
The problem with this is that if a value in my database is not null but does not have a value it does not recognize the difference. I need a way to specifically check for null rather than not having a value.
Basically I need a way to determine between a NULL value in my database and text/blank using a ng-if.
You need to use the Strict Equality Comparison:
ng-if="shortcut.SAM3Link === null"
ng-if - checking for null value of Array
ng-if="shortcut.SAM3Link === null"
ng-if="shortcut.SAM3Link.length === 0"
Related
On the field DaysSinceRequest of an an Access' Form, I am applying a conditional formatting depending on its value in eavch record, that part is fine.
But how could I tell "Apply the conditional formatting to the field DaysSinceRequest ONLY if the field DatePartReceived is empty/null" ?
Is there a way to do this ?
PS : Just to show that I've done something before haters start down rating, here are the rules I've applied to the field DaysSinceRequest and the result in the Datasheet View
Tell if if my post is not clear enough, thanks
Just use Expression Is instead of Field Value Is and in Expression field you can use any expression, which evaluates to Boolean value. In your case you can use IsNull function
Is there a way to handle null value for a field in XDocReport? or do I need to manipulate it on my own? example:
if (thisVar == null)
context.put("sampleText", "");
else
context.put("sampleText", thisVar);
or is there an option in docx quick parts?
I found this line in the error message of XDocReport. However I could not understand where to apply this, in the template or in the code.
Tip: If the failing expression is known to be legally refer to
something that's sometimes null or missing, either specify a default
value like myOptionalVar!myDefault, or use [#if
myOptionalVar??]when-present[#else]when-missing[/#if]. (These only
cover the last step of the expression; to cover the whole expression,
use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
In docx, append ?if_exists to the field name
«${tx.amount?if_exists}»
you may also append !
«${tx.amount!}»
Please refer to this link for those who uses freemarker. How to check if a variable exists in a FreeMarker template?
I am retrieving some data using stored procedure and calling it within the database connector in mule. I have to include a condition when I pass a value which is not there in the database it should capture the error. For this I am using a choice component where I have to check whether the payload is null. But when running the flow in debug mode I found that the payload holds the value
{resultSet1=[]}. I tried #[message.payload.isEmpty()], #[message.payload!=null] and #[payload.resultSet1 != null]. But they weren't working. Could anyone help to resolve this. Thanks in advance.
You can use empty to check for:
Testing for Emptiness: The special literal empty tests the emptiness of a value. It returns an empty value depending on context. empty evaluates to:
null
boolean false
empty strings or strings containing only white space
zero
empty collections
The expression #[foo == empty] evaluates to true if the value if foo satisfies any of the requirements for emptiness.
Which in your case would be
#[payload.resultSet1 != empty]
The best way is #[payload != null && payload.size()>0]
you can try comparing with 'null" or "0" or, simply, "empty" and it should work fine for you :)
#[payload == empty]
should work.
How can I compare two scope values using angularjs in HTML only?
for example:
<div ng-if="place.id = place.reference.id"> show if equals</div>
I want this to cover certain scanrios
You are assigning something this way...
To check for equality you need == or ===, but 3 should be used as Doug says -
"If there is every anything that causes unwanted effects and can be
solved by something else, use the something else..."
Ok maybe he didnt say that exactly but you get the point....
<div ng-if="place.id === place.reference.id"> show if equals</div>
I have one very noob question for AngularJS expressions.
I want to check in expression (ngIf in this case) that something is
undefined. Eg:
data-ng-if="typeof obj.property == 'undefined'"
How I can write expression to check this?
I would be very grateful for any ideas and recommendations.
Best regards.
An undefined property will always be falsy, so you don't have to check it specifically unless you only care that it is undefined. A simply check could then be
data-ng-if="!user.email"
That would evaluate to true unless the user object had the property email with non-falsy value (0,'',undefined are all false). Maybe that is what you are after.
You can do this by using the negation operator:
data-ng-if="!(typeof obj.property == 'undefined')"
Also your call to typeof is a noop, it does nothing. You can simply remove it:
data-ng-if="!(obj.property == 'undefined')"
I agreee with #Matt Pileggi
but just to playing around
if('prop' in obj)