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App Inventor 2 XML数据解析教程 - 从Web API获取和解析XML · App Inventor 2 中文网
...查解析错误
var errorNode = xmlDoc.querySelector('parsererror');
if (errorNode) {
window.AppInventor.setWebViewString("ERROR:" + errorNode.textContent);
return;
}
return xmlDoc;
}
// 提取单个元素文本
function getElementText(xmlString, tagName) {
var xmlDoc = parseXM...
Dialog to pick image from gallery or from camera
...
Camera permission is now needed to open camera intent @tasomaniac
– Saad Bilal
Feb 17 '17 at 10:32
27
...
How do I pass values to the constructor on my wcf service?
...[] baseAddresses)
: base(serviceType, baseAddresses)
{
if (dep == null)
{
throw new ArgumentNullException("dep");
}
foreach (var cd in this.ImplementedContracts.Values)
{
cd.Behaviors.Add(new MyInstanceProvider(dep));
...
Replace only some groups with Regex
...
A good idea could be to encapsulate everything inside groups, no matter if need to identify them or not. That way you can use them in your replacement string. For example:
var pattern = @"(-)(\d+)(-)";
var replaced = Regex.Replace(text, pattern, "$1AA$3");
or using a MatchEvaluator:
var repl...
How can I upload files asynchronously?
...
alert('max upload size is 1k');
}
// Also see .name, .type
});
Now the $.ajax() submit with the button's click:
$(':button').on('click', function () {
$.ajax({
// Your server script to process the upload
url: 'upload.php',
type: 'POST',
// Form data
data: new Form...
Gradle, “sourceCompatibility” vs “targetCompatibility”?
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Since Java 9 there is now a new javac option --release intended to address this problem, by only allowing use of API available in the specified Java version. For more on this see stackoverflow.com/a/43103038/4653517
– James M...
Concatenating two one-dimensional NumPy arrays
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@user391339, what if you wanted to concatenate three arrays? The function is more useful in taking a sequence then if it just took two arrays.
– Winston Ewert
Jul 12 '16 at 17:13
...
Restore the state of std::cout after manipulating it
...ppet:
void printHex(std::ostream& x) {
boost::io::ios_flags_saver ifs(x);
x << std::hex << 123;
}
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...
Install a .NET windows service without InstallUtil.exe
... inst.UseNewContext = true;
try
{
if (undo)
{
inst.Uninstall(state);
}
else
{
inst.Install(state);
inst.Commit(state);
...
warning: incompatible implicit declaration of built-in function ‘xyz’
... In an implicit declaration, the return type is int if I recall correctly. Now, GCC has built-in definitions for some standard functions. If an implicit declaration does not match the built-in definition, you get this warning.
To fix the problem, you have to declare the functions before using them...