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What is the scope of variables in JavaScript?
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TLDR
JavaScript has lexical (also called static) scoping and closures. This means you can tell the scope of an identifier by looking at the source code.
The four scopes are:
Global - visible by everything
Function - visible within a function (and its sub-fun...
python multithreading wait till all threads finished
...join method of Thread object in the end of the script.
t1 = Thread(target=call_script, args=(scriptA + argumentsA))
t2 = Thread(target=call_script, args=(scriptA + argumentsB))
t3 = Thread(target=call_script, args=(scriptA + argumentsC))
t1.start()
t2.start()
t3.start()
t1.join()
t2.join()
t3.joi...
Find the number of columns in a table
... please give me the query once again.. table name = post columns = PostingID, PostingDate, Body
– praveenjayapal
Mar 19 '09 at 16:53
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Selecting a row in DataGridView programmatically
How can I select a particular range of rows in a DataGridView programmatically at runtime?
8 Answers
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CSS disable text selection
...ready to remove the need for the prefix: bugzilla.mozilla.org/show_bug.cgi?id=509958
– B T
Jul 13 '16 at 22:19
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How to build a query string for a URL in C#?
A common task when calling web resources from a code is building a query string to including all the necessary parameters. While by all means no rocket science, there are some nifty details you need to take care of like, appending an & if not the first parameter, encoding the parameters etc.
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Check if a variable is a string in JavaScript
...king both typeof and instanceof feels like good advice if your code may be called by others'. @MarkAmery's postmessage edge case matters if you're asking "what was I just postmessaged?" - but you'd expect that to be handled at the interface and not allowed to propagate. Elsewhere, it seems correct ...
PHP function to build query string from array
... aware that if your route has any path segment parameters e.g. /documents/{id}, then make sure you pass an id argument to the route() parameters too, otherwise it will default to using the value of the first parameter.
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How to extend an existing JavaScript array with another array, without creating a new array
... then pushed to the back of the array. So a.push('x', 'y', 'z') is a valid call that will extend a by 3 elements. apply is a method of any function that takes an array and uses its elements as if they were all given explicitly as positional elements to the function. So a.push.apply(a, ['x', 'y', 'z'...
Which is more efficient, a for-each loop, or an iterator?
...r form. Therefore, you should choose the form of loop that is most aesthetically appealing to you, for most people that will be the for-each loop, as that has less boilerplate code.
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