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When should I use the Visitor Design Pattern? [closed]
... be a directory or an XML tag.
[If your a Java person, imagine of a lot of extra methods to build and maintain the children list.]
class TreeNode( object ):
def __init__( self, name, *children ):
self.name= name
self.children= children
def visit( self, someVisitor ):
...
What are the underlying data structures used for Redis?
...u asked, here is the underlying implementation of every Redis data type.
Strings are implemented using a C dynamic string library so that we don't pay (asymptotically speaking) for allocations in append operations. This way we have O(N) appends, for instance, instead of having quadratic behavior.
...
How can I do string interpolation in JavaScript?
...lity. If it was implemented that way, all the existing code which prints a string in that format will fail.
– thefourtheye
Dec 21 '18 at 7:02
2
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How to pass arguments from command line to gradle
... program with two arguments, args[0] and args[1]:
public static void main(String[] args) throws Exception {
System.out.println(args);
String host = args[0];
System.out.println(host);
int port = Integer.parseInt(args[1]);
my build.gradle
run {
if ( project.hasProperty("appArgs...
UDP vs TCP, how much faster is it? [closed]
...gh, a missing or 'rearranged' packet is critical. You'd have to write some extra code to run on top of UDP to retry if things got missed, and enforce correct order. This would add a small bit of overhead in certain places.
Thankfully, some very very smart people have done this, and they called it T...
Update relationships when saving changes of EF4 POCO objects
...e property "ReportRoles". The new roles are passed in by a comma separated string from an Ajax call.
The first line will remove all the child entities, and if I used "report.ReportRoles.Remove(f)" instead of the "db.ReportRoles.Remove(f)" I would get the error.
report.ReportRoles.ToList.ForEach(Fu...
ORDER BY the IN value list
...n't need a subquery, we can use the set-returning function like a table.
A string literal to hand in the array instead of an ARRAY constructor may be easier to implement with some clients.
Detailed explanation:
PostgreSQL unnest() with element number
...
Warn user before leaving web page with unsaved changes
...ou can do this by handling the beforeunload event and returning a non-null string:
window.addEventListener("beforeunload", function (e) {
var confirmationMessage = 'It looks like you have been editing something. '
+ 'If you leave before saving, your changes will be l...
Typescript: difference between String and string
Does anyone know the difference between String and string in TypeScript? Am I correct in assuming that they ought to be the same?
...
Disable button in jQuery
...
Use .prop instead (and clean up your selector string):
function disable(i){
$("#rbutton_"+i).prop("disabled",true);
}
generated HTML:
<button id="rbutton_1" onclick="disable(1)">Click me</button>
<!-- wrap your onclick in quotes -->
But the ...