大约有 40,000 项符合查询结果（耗时：0.0241秒） [XML]
JS - get image width and height from the base64 code
...
var i = new Image();
i.onload = function(){
alert( i.width+", "+i.height );
};
i.src = imageData;
share
|
improve this answer
|
follow
...
Is it ok to use dashes in Python files when trying to import them?
...t to prevent imports. For example in (say) a Django project, you may have scripts written in Python that should not be addressable as applications. You can put these in a folder like ops-scripts and know they can't be imported using a normal package namespace approach. Or a single script could be...
Unable to add window — token android.os.BinderProxy is not valid; is your activity running?
...
one simple workaround is to catch the exception :
try {
alertDialog.show()
}
catch (WindowManager.BadTokenException e) {
//use a log message
}
It's not elegant but sometimes easy when you have to manage async operations and you are not sure wether activity is up ...
How do I get the base URL with PHP?
... $_SERVER['HTTP_HOST'];
$dir = str_replace(basename($_SERVER['SCRIPT_NAME']), '', $_SERVER['SCRIPT_NAME']);
$core = preg_split('@/@', str_replace($_SERVER['DOCUMENT_ROOT'], '', realpath(dirname(__FILE__))), NULL, PREG_SPLIT_NO_EMPTY);
$core = $core[0];
...
How to wait until an element exists?
..., time) {
if(document.querySelector(selector)!=null) {
alert("The element is displayed, you can put your code instead of this alert.")
return;
}
else {
setTimeout(function() {
waitForElementToDisplay(selector, time);
...
How to get notified about changes of the history via history.pushState?
...vilege to your extension and using the background page (not just a content script), but it does work.
The event you want is browser.webNavigation.onHistoryStateUpdated, which is fired when a page uses the history API to change the URL. It only fires for sites that you have permission to access, and...
Converting .NET DateTime to JSON [duplicate]
...l(data.Data.Entity.Slrq.replace(/\/Date\((\d )\)\//gi, "new Date($1)"));
alert(date.format("yyyy-MM-dd HH:mm:ss"));
alert(dateFormat(date, "yyyy-MM-dd HH:mm:ss"));
Backbone.js fetch with parameters
...options = ', options);
collection.fetch(options);
} catch (excp) {
alert(excp);
}
share
|
improve this answer
|
follow
|
...
Compile (but do not run) a Python script [duplicate]
How do I compile a Python script without running it? I just want to check the script for syntax errors. I was hoping for a simple command line switch, but I didn't see anything in python --help . I'd like an answer for both Python 2 and Python 3.
...
How can I check if an element exists in the visible DOM?
...
I simply do:
if(document.getElementById("myElementId")){
alert("Element exists");
} else {
alert("Element does not exist");
}
It works for me and had no issues with it yet...
share
|
...