大约有 30,000 项符合查询结果（耗时：0.0848秒） [XML]
Which Radio button in the group is checked?
...Button;
if(r != null && r.Checked) return Int32.Parse((string)r.Tag);
}
return Default;
}
public static bool IsRadioSelected(this RadioButton rb) {
foreach(Control c in rb.Parent.Controls) {
RadioButton r = c as RadioButton;
...
What is the difference between declarative and imperative programming? [closed]
...eclarative programming is to invent new domain specific languages (DSL):
String Search: Regular Expression instead of custom imperative code
React.js: JSX instead of direct DOM manipulation
AWS CloudFormation: YAML instead of CLI
Relational Database: SQL instead of older read–write APIs such as ...
What is the difference between a cer, pvk, and pfx file?
...2 == "PKCS12"
fully encrypted
.pem == .cer == .cert == "PEM"
base-64 (string) encoded X509 cert (binary) with a header and footer
base-64 is basically just a string of "A-Za-z0-9+/" used to represent 0-63, 6 bits of binary at a time, in sequence, sometimes with 1 or 2 "=" characters at the ve...
“Too many values to unpack” Exception
...no Borini, I am getting also similar error but in my case, I am creating a string as obj='{"vendorId": "' + vID +'", "vendorName" :"'+vName+'", "addedDate" : "'+vAddedDate+'","usersList" : "'+ usersList + '," status" : "'+str(vStatus)+'","edit"'+edit+'"}'; although all the values are string, it give...
What does @hide mean in the Android source code?
...anager.java uses @hide:
/** @hide */
public static int checkUidPermission(String permission, int uid) {
try {
return AppGlobals.getPackageManager()
.checkUidPermission(permission, uid);
} catch (RemoteException e) {
// Should never happen, but if it does... d...
Get a CSS value with JavaScript
... to check what unit it returns, you can get that without any slice() or substring() string.
var element = document.querySelector('.js-header-rep');
element.computedStyleMap().get('padding-left');
var element = document.querySelector('.jsCSS');
var con = element.computedStyleMap().get('paddin...
Predicate in Java
... a given input. For example, a RegexPredicate might implement Predicate<String>, and return true for any string that matches its given regular expression.
This is essentially an OOP abstraction for a boolean test.
For example, you may have a helper method like this:
static boolean isEven(...
Build the full path filename in Python
...uild the file path from a directory name, base filename, and a file format string?
4 Answers
...
Is there a way that I can check if a data attribute exists?
...{
...
}
NOTE this only returns true if the data attribute is not empty string or a "falsey" value e.g. 0 or false.
If you want to check for the existence of the data attribute, even if empty, do this:
if (typeof $("#dataTable").data('timer') !== 'undefined') {
...
}
...
In SQL Server, when should you use GO and when should you use semi-colon ;?
...terminator. In another DBMS I have seen the ability to set the termination string. For example, you might specify that statements end with two pipe characters ||. You could then issue CREATE PROCEDURE ... much SQL ending in ; ... || and the double pipe ends the CREATE PROCEDURE statement. So my ques...