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Cloning an Object in Node.js
....assign({}, source);
If available (e.g. Babel), you can use the object spread operator:
let cloned = { ... source };
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MySQL check if a table exists without throwing an exception
...NCTION TABLE_EXISTS(_table_name VARCHAR(45))
RETURNS BOOLEAN
DETERMINISTIC READS SQL DATA
BEGIN
DECLARE _exists TINYINT(1) DEFAULT 0;
SELECT COUNT(*) INTO _exists
FROM information_schema.tables
WHERE table_schema = DATABASE()
AND table_name = _table_name;
RETURN _exists...
If strings are immutable in .NET, then why does Substring take O(n) time?
... I've seen this sort of code quite a bit: string contents = File.ReadAllText(filename); foreach (string line in content.Split("\n")) ... or other versions of it. I mean read an entire file, then process the various parts. That sort of code would be considerably faster and require less memo...
How to convert a string into double and vice versa?
... instance of NSNumberFormatter configured for the locale from which you're reading the string.
Different locales will format numbers differently. For example, in some parts of the world, COMMA is used as a decimal separator while in others it is PERIOD — and the thousands separator (when used) ...
Remove Elements from a HashSet while Iterating [duplicate]
... @RomainF. - What do you mean by hidden temporal coupling? Do you mean thread safe? Second, neither I would recommend this but the solution does have its pro. Super easy to read and hence maintainable.
– saurabheights
Jun 1 '17 at 9:15
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Add disabled attribute to input element using Javascript
... this is the best answer: "you can use both... but it depends."
You should read this answer instead: https://stackoverflow.com/a/5876747/257493
And their release notes for that change are included here:
Neither .attr() nor .prop() should be used for getting/setting value. Use the .val() method inst...
How and when to use ‘async’ and ‘await’
...he main things that async and await do is to make code easy to write and read - but is using them equal to spawning background threads to perform long duration logic?
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How to do a case sensitive search in WHERE clause (I'm using SQL Server)?
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People reading this question may also find it useful to read how to change the column itself to be case sensitive which eliminates the need for using collation in the WHERE clause. See: stackoverflow.com/a/485394/908677
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Accessing elements of Python dictionary by index
...ther 'Apple' as a fruit and 'American' as a type of 'Apple' exist when you read an arbitrary file into your dict of dict data structure, you could do something like:
print [ftype['American'] for f,ftype in myDict.iteritems() if f == 'Apple' and 'American' in ftype]
or better yet so you don't unne...
What is the difference between .text, .value, and .value2?
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Regarding conventions in C#. Let's say you're reading a cell that contains a date, e.g. 2014-10-22.
When using:
.Text, you'll get the formatted representation of the date, as seen in the workbook on-screen:
2014-10-22. This property's type is always string but may not ...