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Why dict.get(key) instead of dict[key]?
...ever you choose it to be), whereas
dictionary["bogus"]
would raise a KeyError.
If omitted, default_value is None, such that
dictionary.get("bogus") # <-- No default specified -- defaults to None
returns None just like
dictionary.get("bogus", None)
would.
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Understanding what 'type' keyword does in Scala
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Suppose you have the following scenario:
Here you will get compilation error, because eat method in classes Cow and Tiger do not override the eat method in class Animal, because their parameter types are different. It's Grass in class Cow, and Meat in class Tiger vs. Food in class Animal which i...
Can you explain the concept of streams?
...re. But what is the point of the stream? Why isn't the backing store itself what we interact with?
15 Answers
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Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
...en dash encounters ${file//IMG/myVacation}, it fails with Bad substitution error because this syntax does not conform to POSIX.
– Susam Pal
Sep 22 at 9:38
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Awaiting multiple Tasks with different results
...stion is whether you want to await them one at a time or all together. The error handling is slightly different - if you use Task.WhenAll, then it will await them all, even if one of them fails early.
– Stephen Cleary
Mar 13 '15 at 12:17
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What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
...x comma joins with the other join types when there is a join condition, an error of the form Unknown column 'col_name' in 'on clause' may occur"
– Captain Payalytic
Oct 17 '18 at 11:27
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When to use RDLC over RDL reports?
...8 in the past weeks and have created some server side reports. For some application, a colleague suggested that I look into RDLC for that particular situation. I am now trying to get my head around the main difference between RDL and RDLC.
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Get the height and width of the browser viewport without scrollbars using jquery?
...ocument).ready(function() {
if(typeof $=='undefined') {
alert("Error, you haven't called JQuery library");
}
if(document.doctype==null || screen.height < parseInt($(window).height()) ) {
alert("ERROR, check your do
How come a non-const reference cannot bind to a temporary object?
...ld get at the modified value anyway. He says that this, most likely, is an error.
– sbi
Oct 14 '09 at 16:56
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How should equals and hashcode be implemented when using JPA and Hibernate
...d; otherwise you may end up with strange behavior (ultimately resulting in errors and / or data corruption) because your entity may be allocated to a bucket not matching its current hashCode().
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