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Checking if a key exists in a JS object
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Use the in operator:
testArray = 'key1' in obj;
Sidenote: What you got there, is actually no jQuery object, but just a plain JavaScript Object.
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How do I perform a Perl substitution on a string while keeping the original?
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This is the idiom I've always used to get a modified copy of a string without changing the original:
(my $newstring = $oldstring) =~ s/foo/bar/g;
In perl 5.14.0 or later, you can use the new /r non-destructive substitution modifier:
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outline on only one border
How to apply an inset border into an HTML element, but just only on one side of it.
Until now, I've been using an image to do that (GIF/PNG) that I would then use as a background and stretch it (repeat-x) and position a little off from the top of my block.
Recently, I discovered the outline CSS...
runOnUiThread vs Looper.getMainLooper().post in Android
...s Looper.getMainLooper().post() to execute a task on the UI thread in Android??
1 Answer
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How to dump a dict to a json file?
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print(j, file=f) didn't work for me,I didn't need to do the J part as well. d = {'a':1, 'b':2} print(d, file=open('sample.json', 'wt')) worked.
– H S Rathore
May 23 at 7:08
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How do I escape curly braces for display on page when using AngularJS?
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what if the {{value}} is inside of an input tag value?
– Timo Huovinen
Aug 21 '15 at 12:15
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jQuery Set Select Index
...M element, not a jQuery one. Keep in mind the .eq function can be used outside of the selector as well if you prefer.
$('#selectBox option').eq(3).prop('selected', true);
You can also be more terse/readable if you want to use the value, instead of relying on selecting a specific index:
$("#sel...
Rails: around_* callbacks
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It makes sense and is not in the official Rails guides.
– Dan S.
Nov 21 '18 at 19:04
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Comparing two CGRects
...g the == or != operators works for me:
let rect = CGRect(x: 0, y: 0, width: 20, height: 20)
if rect != CGRect(x: 0, y: 0, width: 20, height: 21) {
print("not equal")
}
if rect == CGRect(x: 0, y: 0, width: 20, height: 20) {
print("equal")
}
debug console print...
How can I switch to a tag/branch in hg?
...ollowed the documentation in https://developer.mozilla.org/En/Developer_Guide/Source_Code/Mercurial
and downloaded FF source with:
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