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Android List Preferences: have summary as selected value?
... // set first value by default
listPreference.setValueIndex(0);
}
listPreference.setSummary(listPreference.getValue().toString());
listPreference.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
@Override
public boo...
How to use Servlets and Ajax?
... HTML DOM element with ID "somediv".
$.each(responseJson, function(index, item) { // Iterate over the JSON array.
$("<li>").text(item).appendTo($ul); // Create HTML <li> element, set its text content with currently iterated item and append it to the <ul>.
...
How can I process each letter of text using Javascript?
...
Nope, it can't. forEach() passes the index and the array as second and third argument. I would rather not log that..
– Mr. Goferito
Aug 1 '18 at 20:39
...
Importance of varchar length in MySQL table
...u can run into: Big joins are nearly impossible with long varchar columns. Indexing on those columns are a real killer. Your disk has to store the data. One memory page can hold less rows and table scans will be much slower. Also the query cache will be unlikely to help you here.
You have to ask yo...
Can I apply the required attribute to fields in HTML5?
...at the user selects something.
In Javascript, you can check the selectedIndex property to get the index of the selected option, or you can check the value property to get the value of the selected option.
According to the HTML5 spec, selectedIndex "returns the index of the first selected item, i...
Where is body in a nodejs http.get response?
...atically.
var options = {
host: 'www.google.com',
port: 80,
path: '/index.html'
};
http.get(options, function(res) {
console.log("Got response: " + res.statusCode);
res.on("data", function(chunk) {
console.log("BODY: " + chunk);
});
}).on('error', function(e) {
console.log("Got ...
How to install Google Play Services in a Genymotion VM (with no drag and drop support)?
How can I install Google Play Services in a Genymotion emulator with no drag and drop support?
17 Answers
...
How to test if list element exists?
...eck on full path, this can be used.
Element_Exists_Check = function( full_index_path ){
tryCatch({
len_element = length(full_index_path)
exists_indicator = ifelse(len_element > 0, T, F)
return(exists_indicator)
}, error = function(e) {
return(F)
})
}
...
Is there a way to measure how sorted a list is?
...r of inversions.
The number of inversions is the number of pairs (a,b) st index of a < b AND b << a. For these purposes << represents whatever ordering relation you choose for your particular sort.
A fully sorted list has no inversions, and a completely reversed list has the maximum...
Why am I getting an OPTIONS request instead of a GET request?
it does an OPTIONS request to that URL, and then the callback is never called with anything.
10 Answers
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