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How to avoid 'cannot read property of undefined' errors?
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Update:
If you use JavaScript according to ECMAScript 2020 or later, see optional chaining.
TypeScript has added support for optional chaining in version 3.7.
// use it like this
obj?.a?.lot?.of?.properties
Solution for JavaScript before ECMASCript 2020 or TypeScript older ...
How to remove non-alphanumeric characters?
I need to remove all characters from a string which aren't in a-z A-Z 0-9 set or are not spaces.
9 Answers
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Foreach loop, determine which is the last iteration of the loop
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303
If you just need to do something with the last element (as opposed to something different with ...
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How to force child div to be 100% of parent div's height without specifying parent's height?
...exbox standard. For a modern approach, see: https://stackoverflow.com/a/23300532/1155721
I suggest you take a look at Equal Height Columns with Cross-Browser CSS and No Hacks.
Basically, doing this with CSS in a browser compatible way is not trivial (but trivial with tables) so find yourself an ...
Change One Cell's Data in mysql
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answered Jun 11 '10 at 16:42
Brian HooperBrian Hooper
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Get exception description and stack trace which caused an exception, all as a string
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ianace
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answered Dec 30 '10 at 17:05
kindallkindall
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How to escape double quotes in a title attribute
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edited Jan 20 at 21:09
vsync
76.1k4141 gold badges223223 silver badges291291 bronze badges
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Find the last element of an array while using a foreach loop in PHP
...t sounds like you want something like this:
$numItems = count($arr);
$i = 0;
foreach($arr as $key=>$value) {
if(++$i === $numItems) {
echo "last index!";
}
}
That being said, you don't -have- to iterate over an "array" using foreach in php.
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How to write to an existing excel file without overwriting data (using pandas)?
....sheets for?
– BP_
Nov 26 '13 at 16:04
5
ExcelWriter for some reason uses this variable to access...