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What is the difference between RegExp’s exec() function and String’s match() function?
...ile (match = re.exec('/a/b/c/d')) {
// match is now the next match, in array form.
}
// No more matches.
String.match does this for you and discards the captured groups.
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Remove querystring from URL
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Bob - good catch. Actually it returns an array of matches - an Array of strings in this case. So testURL.match(new RegExp("[^?]+"))[0] does it
– plodder
Mar 29 '10 at 23:10
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How do I get formatted JSON in .NET using C#?
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This works, but only if the json object isn't an array. If you know it'll be an array you could us JArray.Parse instead.
– Luke Z
Jun 8 '17 at 23:26
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How do I make a column unique and index it in a Ruby on Rails migration?
...olumn_name, unique: true
To index multiple columns together, you pass an array of column names instead of a single column name,
add_index :table_name, [:column_name_a, :column_name_b], unique: true
If you get "index name... is too long", you can add name: "whatever" to the add_index method to m...
What is JavaScript garbage collection?
...ions.
Here's a simple example:
function init() {
var bigString = new Array(1000).join('xxx');
var foo = document.getElementById('foo');
foo.onclick = function() {
// this might create a closure over `bigString`,
// even if `bigString` isn't referenced anywhere!
};
}...
Generator Expressions vs. List Comprehension
...the whole file, processes each line, and stores the matching lines in your array. This array could therefore contain up to 2TB of content. That's a lot of RAM, and probably not practical for your purposes.
So instead we can use a generator to apply a "filter" to our content. No data is actually rea...
Java Enum Methods - return opposite direction enum
... NORTH, EAST, SOUTH, WEST;
// cached values to avoid recreating such array each time method is called
private static final Direction[] VALUES = values();
public Direction getOppositeDirection() {
return VALUES[(ordinal() + 2) % 4];
}
}
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Why does Java switch on contiguous ints appear to run faster with added cases?
...de into assembly, the tableswitch instruction does not always result in an array of pointers: sometimes the switch table is transformed into what looks like a lookupswitch (similar to an if/else if structure).
Decompiling the assembly generated by the JIT (hotspot JDK 1.7) shows that it uses a succ...
Check if checkbox is checked with jQuery
How can I check if a checkbox in a checkbox array is checked using the id of the checkbox array?
23 Answers
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How to filter by object property in angularJS
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The problem with filtering is that a new array is created every time a filter is applied which breaks the tie between a filtered item and its original index in the unfiltered array. Is there a way to maintain the tie or is ng-hide my only option? Here's a tutorial f...