Do you know of any way to reference an object in the replacement part of preg_replace. I'm trying to replace placeholders (delimited with precentage signs) in a string with the values of attributes of an object. This will be executed in the object itself, so I tried all kinds of ways to refer to $this with the /e modifier. Something like this:
/* for instance, I'm trying to replace
* %firstName% with $this->firstName
* %lastName% with $this->lastName
* etc..
*/
$result = preg_replace( '~(%(.*?)%)~e', "${'this}->{'\\2'}", $template );
I can't get any variation on this theme to work. One of the messages I've been getting is: Can't convert object Model_User to string.
But of course, it's not my intention to convert the object represented by $this to a string... I want to grab the attribute of the object that matches the placeholder (without the percentage signs of course).
I think I'm on the right track with the /e modifier. But not entirely sure about this either. Maybe this can be achieved much more simple?
Any ideas about this? Thank you in advance.
Like I commented to Paul's answer: in the meanwhile I found the solution myself. The solution is much more simple than I thought. I shouldn't have used double quotes.
The solution is as simple as this:
$result = preg_replace( '~(%(.*?)%)~e', '$this->\\2', $template );
Hope this helps anyone else for future reference.
Cheers.
Check out preg_replace_callback - here's how you might use it.
class YourObject
{
...
//add a method like this to your class to act as a callback
//for preg_replace_callback...
function doReplace($matches)
{
return $this->{$matches[2]};
}
}
//here's how you might use it
$result = preg_replace_callback(
'~(%(.*?)%)~e',
array($yourObj, "doReplace"),
$template);
Alternatively, using the /e modifier, you could maybe try this. I think the only way to make it work for your case would be to put your object into global scope
$GLOBALS['yourObj']=$this;
$result = preg_replace( '~(%(.*?)%)~e', "\$GLOBALS['yourObj']->\\2", $template );
Related
I am trying to make my program read and edit text. I was trying to use the Position=find ( String , 0 ) method but I get the error:
The method "find" isn't declared in the current class.
I have tried different classes but I cant find the correct one.
Which would that be?
How may I find the correct class in the future?
Thanks in advance.
The find is in the String class.
From the documentation:
int find ( String what, int from=0 )
Finds the first occurrence of a substring. Returns the starting position of the substring or -1 if not found.
So what happens?
When you do Position = find(String, 0) You are calling find from which ever class your code is inside, not from String.
Furthermore, I only see one String there… Which String do you want to find in which one? You need two. Yes, find only takes one String, but it is an instance method, not a static method. You are meant to call it on the one you want to search, like this:
var position := string_in_which_you_are_looking.find(string_you_are_looking_for, 0)
I am using below PowerShell code in azure functions to retrieve rows of users in azure table who belongs to a particular location.
$Rows = Get-AzTableRow -table $cloudTable -customFilter "((Location eq '$loc') and (PartitionKey eq 'User'))"
Next, I need to pass the result ($Rows) of the above query to a function as parameter. Tried to define the function as
function display_rows($param){
$tempcount = $param.Count
for($i=0; $i -lt $tempcount; $i++){
...code body...
}
}
and invoke the function as display_rows "$Rows". But it seems it's not working as intended. Is this the proper way to pass the result of Get-AzTableRow to a function? please help me with this.
the basic problem is that you are sending a "stringified" version of the object to the function. [grin]
when you do ...
display_rows "$Rows"
... are not sending the object in $Rows to the function. you are converting that object into a string and sending that.
that simple string object aint what you want. [grin] you want the complex object instead.
so, the fix is to NOT wrap $Rows in double quotes. just use it bare, like so ...
display_rows $Rows
that will send the object contained in the $Var to the function, not the .ToString() of that object.
as an aside, you otta NEVER use quotes around a $Var unless you are sure you need them.
How can I emphasize an impex macro if it is part of a string?
We can do something like this:
$prefix=alpha
$contentCatalog=$prefixContentCatalog
... and $contentCatalog will return "alphaContentCatalog".
Can I make the macro more explicit with something like:
$contentCatalog={$prefix}ContentCatalog
... so that I can immediately see that the macro is $prefix? Is there a syntax for this? (NOTE: The curly brace is just an example. This syntax/symbol doesn't exist for this purpose)
Another example: If I have something like below, it becomes confusing:
$prefix=electronics
$contentCatalog=$prefixContentCatalog
$contentCatalogFolderName=$contentCatalogFolder
But it can be easier to understand if it can be written as:
$prefix=electronics
$contentCatalog={$prefix}ContentCatalog
$contentCatalogFolderName={$contentCatalog}Folder
Hhmmm, unfortunately I don't think there is anything for this. I only see some workarounds like special naming for macro variables:
$_prefix_=electronics
$_contentCatalog_=$_prefix_ContentCatalog
$contentCatalogFolderName=$_contentCatalog_Folder
there is an alternate way to customize the micro via injecting property in local.properties and using ConfigPropertyImportProcessor.
UPDATE GenericItem[processor = de.hybris.platform.commerceservices.impex.impl.ConfigPropertyImportProcessor]; pk[unique = true]
$contentCatalog = $config-ly.br.content.catalog
$contentCV = catalogVersion(CatalogVersion.catalog(Catalog.id[default = $contentCatalog]), CatalogVersion.version[default = Staged])[default = $contentCatalog:Staged]
and entries should be added in local.properties.
ly.br.content.catalog=TestContentCatalog
Note:This is useful when we have multi-country.
I'm using a IwNUI CTextFieldPtr control and I would like to store/use the text attribute stored on the object in a string variable. I need to use that string but I have no clue on the documentation or examples on how to do it... I don't have a complete code sample either because what I'm asking should be pretty straight forward, such as:
CTextFieldPtr login_tUsername;
//textfield init here
std::string c_username;
login_tUsername->GetAttribute("text", c_username);
Please help me, thank you very much!
And other approach, would be something like this, which is by far much closer to what I wanted to do:
CString value;
login_tUsername->GetAttribute("text", value);
std::string thestring = value.Get();
:)
(Credit goes billarhos billarhos)
Well... the best solution I found for this problem was something like this:
login_tUsername->SetEventHandler("textchanged", this, &OnUserEdit);
bool OnUserEdit(CTextField* textField, const char* text)
{
c_username = text;
return true;
}
I don't know why, but it seems you cannot use the textbox text attribute directly.
Cheers!
I'm fairly new to groovy, looking at some existing code, and I see this:
def timestamp = event.timestamp[]
I don't understand what the empty square brackets are doing on this line. Note that the timestamp being def'd here should receive a long value.
In this code, event is defined somewhere else in our huge code base, so I'm not sure what it is. I thought it was a map, but when I wrote some separate test code using this notation on a map, the square brackets result in an empty value being assigned to timestamp. In the code above, however, the brackets are necessary to get correct (non-null) values.
Some quick Googling didn't help much (hard to search on "[]").
EDIT: Turns out event and event.timestamp are both zero.core.groovysupport.GCAccessor objects, and as the answer below says, the [] must be calling getAt() on these objects and returning a value (in this case, a long).
The square brackets will invoke the underlying getAt(Object) method of that object, so that line is probably invoking that one.
I made a small script:
class A {
def getAt(p) {
println "getAt: $p"
p
}
}
def a = new A()
b = a[]
println b.getClass()
And it returned the value passed as a parameter. In this case, an ArrayList. Maybe that timestamp object has some metaprogramming on it. What does def timestamp contains after running the code?
Also check your groovy version.
Empty list, found this. Somewhat related/possibly helpful question here.
Not at a computer, but that looks like it's calling the method event.timestamp and passing an empty list as a parameter.
The same as:
def timestamp = event.timestamp( [] )