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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
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you can actually look at the .net source for it now too: referencesource.microsoft.com/#mscorlib/system/collections/… you can see that all 3 of TryGetValue, ContainsKey, and this[] call the same FindEntry method and do the same amount of work, only differing in how they...
force client disconnect from server with socket.io and nodejs
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Edit: This is now possible
You can now simply call socket.disconnect() on the server side.
My original answer:
This is not possible yet.
If you need it as well, vote/comment on this issue.
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Django development IDE [closed]
...ans starting to get Python support, but I have no idea where that is right now. Lots of people rave about NetBeans 6, but in the Java world Eclipse still reigns as the king of the OSS IDEs.
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When do items in HTML5 local storage expire?
...parse(localStorage.getItem("key")),
dateString = object.timestamp,
now = new Date().getTime().toString();
compareTime(dateString, now); //to implement
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How to undo “git commit --amend” done instead of “git commit”
...happens on top of a different commit from where the current branch head is now.
# Move the current head so that it's pointing at the old commit
# Leave the index intact for redoing the commit.
# HEAD@{1} gives you "the commit that HEAD pointed at before
# it was moved to where it currently point...
How to have an automatic timestamp in SQLite?
...rged your answer and javed's. With DEFAULT (STRFTIME('%Y-%m-%d %H:%M:%f', 'NOW', 'localtime')) one actually gets meaningful microsecond values.
– Dietmar
Jun 22 '17 at 18:24
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How can I check for “undefined” in JavaScript? [duplicate]
...n window; // true
"theFoo" in window; // false
If you are interested in knowing whether the variable hasn't been declared or has the value undefined, then use the typeof operator, which is guaranteed to return a string:
if (typeof myVar !== 'undefined')
Direct comparisons against undefined are ...
Why do we use __init__ in Python classes?
...bute", as opposed to "instance attributes" that are colour or legs above.
Now, to something less canine and more programming-related. As I write below, class to add things is not sensible - what is it a class of? Classes in Python make up of collections of different data, that behave similarly. Cla...
How does `is_base_of` work?
...tness anymore. In an ordinary overload resolution scenario, the call would now be ambiguous because normally the return type won't participate in overload resolution. For conversion functions, however, there is a backdoor. If two conversion functions are equally good, then the return type of them de...
Format Instant to String
...tant a time-zone is required. Without a time-zone, the formatter does not know how to convert the instant to human date-time fields, and therefore throws an exception.
The time-zone can be added directly to the formatter using withZone().
DateTimeFormatter formatter =
DateTimeFormatter.ofLocal...