I want to get rid of the xml declaration when I use libxml2's function xmlSaveFile. How can I accomplish that ?
Is there any macro to do that or can I use another function (I tried with xmlSaveToFilename from xmlsave.h but I do not know how it works) ?
Something like this should work:
xmlSaveCtxtPtr saveCtxt = xmlSaveToFilename(filename, NULL, XML_SAVE_NO_DECL);
if (saveCtxt == NULL) {
// Error handling
}
if (xmlSaveDoc(saveCtxt, doc) < 0) {
// Error handling
}
xmlSaveClose(saveCtxt);
The documentation of the xmlsave module can be found here.
Related
I have an object of $person as below:
$person = Person::where('id', $id)->first();
According to which $person exists or not I load other data:
if($person) {
$person->family_members = FamilyMemberController::FamilyMemberOf($person->id);
} else {
$person->family_members = [];
}
In the view file, I check the $person->family_members if not empty and exists to add a generated value :
if(!empty(array_filter($person->family_members))) {
// my code
}
But it throws an error:
array_filter(): Argument #1 ($array) must be of type array, Illuminate\Database\Eloquent\Collection given
I need to check this $person->family_members to make sure whether it's an array or a collection is not empty.
Writing code for if array do something if collection do something is the wrong way of implementation.
You can do two things.
use both returns as collection()
or either use both returns as an array[]
If collection
else {
$person->family_members = collect();
}
If array
use ->toArray() at the end of Eloquent. Check this answer
As well, I think you are confused with array_filter(). Maybe you are searching for in_array() or contains()
Use count method
if(count($person->family_members)>0){
//your code
}
We don't know your code, but given the error, it's safe to assume your method returns a Collection. You can see available methods in the docs. However, if you need it as array, all you need to do is call ->toArray() on the result Collection. Then you can use array_filter.
What about just doing
if(!$person->family_members){
// your code here
}
or
if($person->family_members){
// your code here
} else {
// code of "if it's empty" goes here
}
You can use the count() function to return a count of an index. ex
if(count($person->family_members)){
//do your true algo
}
Why you are using the empty method ?! Try this:
$person->family_members = $person ? FamilyMemberController::FamilyMemberOf($person->id) : null;
if($person->family_members){ // your code }
Try simple ways in Programming ;)
I have the following code:
public fun findSomeLikeThis(): ArrayList<T>? {
val result = Db4o.objectContainer()!!.queryByExample<T>(this as T) as Collection<T>
if (result == null) return null
return ArrayList(result)
}
If I call this like:
var list : ArrayList<Person>? = p1.findSomeLikeThis()
for (p2 in list) {
p2.delete()
p2.commit()
}
It would give me the error:
For-loop range must have an 'iterator()' method
Am I missing something here?
Your ArrayList is of nullable type. So, you have to resolve this. There are several options:
for (p2 in list.orEmpty()) { ... }
or
list?.let {
for (p2 in it) {
}
}
or you can just return an empty list
public fun findSomeLikeThis(): List<T> //Do you need mutable ArrayList here?
= (Db4o.objectContainer()!!.queryByExample<T>(this as T) as Collection<T>)?.toList().orEmpty()
try
for(p2 in 0 until list.count()) {
...
...
}
I also face this problem when I loop on some thing it is not an array.
Example
fun maximum(prices: Array<Int>){
val sortedPrices = prices.sort()
for(price in sortedPrices){ // it will display for-loop range must have iterator here (because `prices.sort` don't return Unit not Array)
}
}
This is different case to this question but hope it help
This can also happen in Android when you read from shared preferences and are getting a (potentially) nullable iterable object back like StringSet. Even when you provide a default, the compiler is not able to determine that the returned value will never actually be null. The only way I've found around this is by asserting that the returned expression is not null using !! operator, like this:
val prefs = PreferenceManager.getDefaultSharedPreferences(appContext)
val searches = prefs.getStringSet("saved_searches", setOf())!!
for (search in searches){
...
}
i have this error displayed while working on my php code
Parse error: syntax error, unexpected T_CONSTANT_ENCAPSED_STRING
on this line
if(isset('firstname','lastname','username','password','email'
Would appreciate if anyone can help.
You forget the variable name. In isset has to be variable(s), not strings. If I take an example with testing keys in POST, it should looks like:
if (isset($_POST['firstname'], $_POST['lastname'], ...)) {
//
}
Generally with $array, $_POST can looks like something magic:
if (isset($array['firstname'], $array['lastname'], ...)) {
//
}
Or you maybe want to test if variables exist, not keys in array. Then the code will be:
if (isset($firstname, $lastname, ...)) {
//
}
As part of a xtype combo, I would like to know if the layer I choose in my simple data store (represented by this.getValue()) is present in the map layers. So if it does, A should occur, and B if it does not. The problem is that myLayer variable seems to be unrecognized, even though Opera Dragonify throws no error at all. Where would be the error?
listeners: {
'select': function(combo, record) {
for(var i = 0; i < mapPanel.map.length; i++) {
var myLayer = mapPanel.map.layers[i].name;
if (myLayer == this.getValue()) {
// do A here...
} else {
// do B here...
}
}
}
}
Thanks for any pointers,
I think the problem is that you are using this.getValue() instead of using combo.getValue().
I don't know how your app is set but it's usually a better idea to use the first parameter of your listener instead of the keywork this in order to avoid scope issues.
Hope this helps
#Guilherme Lopes Thanks for that, but the solution was this: mapPanel.map.layers.length instead of mapPanel.map.length.
I find the ICU docs somewhat challenging.
My question is: How do I normalize a string using ICU4C?
I'm looking at unorm2_normalize, but what if the buffer isn't large enough? How would I know this before? Naturally, I want to normalize the entire string.
Thanks! :>
P.S. Here is the API doc on that function: http://icu-project.org/apiref/icu4c/unorm2_8h.html#a0a596802db767da410b4b04cb75cbc53
You get a error code back from all these function call in the pErrorCode parameter. This is how you call such a function:
UErrorCode error = U_ZERO_ERROR;
unorm2_normalize( ... &error );
....
if( !U_SUCCESS( error ) )
{
// handle error...
}
Here are the error codes: http://icu-project.org/apiref/icu4c/utypes_8h.html#a3343c1c8a8377277046774691c98d78c
In your case you might want to do something like this:
if( error == U_STRING_NOT_TERMINATED_WARNING
|| error == U_BUFFER_OVERFLOW_ERROR )
{
// enlarge the buffer...
}