Uncaught TypeError: Cannot read property ‘toUpperCase’ of undefined
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string-matching
PowerShell and the -contains operator
The -Contains operator doesn’t do substring comparisons and the match must be on a complete string and is used to search collections. From the documentation you linked to: -Contains Description: Containment operator. Tells whether a collection of reference values includes a single test value. In the example you provided you’re working with a collection containing just one string … Read more
How do I check if a string contains a specific word?
You can use the strpos() function which is used to find the occurrence of one string inside another one: Note that the use of !== false is deliberate (neither != false nor === true will return the desired result); strpos() returns either the offset at which the needle string begins in the haystack string, or the boolean false if the needle isn’t found. Since 0 is a … Read more
PowerShell and the -contains operator
The -Contains operator doesn’t do substring comparisons and the match must be on a complete string and is used to search collections. From the documentation you linked to: -Contains Description: Containment operator. Tells whether a collection of reference values includes a single test value. In the example you provided you’re working with a collection containing just one string … Read more
How do I check if a string contains a specific word?
You can use the strpos() function which is used to find the occurrence of one string inside another one: Note that the use of !== false is deliberate (neither != false nor === true will return the desired result); strpos() returns either the offset at which the needle string begins in the haystack string, or … Read more
How to check whether a string contains a substring in JavaScript?
ECMAScript 6 introduced String.prototype.includes: Expand snippet includes doesn’t have Internet Explorer support, though. In ECMAScript 5 or older environments, use String.prototype.indexOf, which returns -1 when a substring cannot be found: