Using a more functional approach, you can implement the match with a one-liner using an array function: ECMAScript 6: const regexList = [/apple/, /pear/]; const text = “banana pear”; const isMatch = regexList.some(rx => rx.test(text)); ECMAScript 5: var regexList = [/apple/, /pear/]; var text = “banana pear”; var isMatch = regexList.some(function(rx) { return rx.test(text); });
You can check multiple conditions inside the same square brackets: /Location/Addr[State=”TX” or State=”AL” or State=”MA”] Or if you have a really long list, you can create a list of states and use the contains() function. /Location/Addr[contains(‘TX AL MA’, State)] This will work fine for two-letter state abbreviations. If you want to make it more robust … Read more
Are all statements also expressions? “Wherever JavaScript expects a statement, you can also write an expression. Such a statement is called an expression statement. The reverse does not hold: you cannot write a statement where JavaScript expects an expression. For example, an if statement cannot become the argument of a function.” This is comes from … Read more
Lambda expressions can be converted to delegates or expression trees (with some restrictions); anonymous methods can only be converted to delegates Lambda expressions allow type inference on parameters: Lambda expressions allow the body to be truncated to just an expression (to return a value) or single statement (in other cases) without braces. Lambda expressions allow … Read more
<xsl:if test=”xpath-expression”>…</xsl:if> so for example <xsl:if test=”/html/body”>body node exists</xsl:if> <xsl:if test=”not(/html/body)”>body node missing</xsl:if>
I’ve come up with a way to chunk the query into pieces – i.e. you give it 4000 values, so it might do 4 requests of 1000 each; with full Northwind example. Note that this might not work on Entity Framework, due to Expression.Invoke – but is fine on LINQ to SQL: using System; using … Read more
You can have a look at the type ExpressionEqualityComparer that is used inside Linq to db4o. It implements the interface IEqualityComparer<T>, so it’s usable for generic collections, as well as for a standalone usage. It uses the type ExpressionComparison to compare two Expressions for equality, and HashCodeCalculation, to compute a hashcode from an Expression. It … Read more
This expression will search for non-ASCII values: [^\x00-\x7F]+ Tick off ‘Search Mode = Regular expression’, and click Find Next. Source: Regex any ASCII character
Use of # (pound sign) OGNL is used to refer to objects in the ActionContext as follows: objectName: object in the ValueStack (default/root object in the OGNL context), such as an Action property #objectName: object in the ActionContext but outside of the ValueStack, specifically… #objectName: ActionContext object that has been created using the Struts2 data … Read more
You should avoid coding such unreadable code. It is actually parsed as m = (++i && ++j) || ++k; So once j >= 0 the ++j condition is always true, so ++k is not evaluated since && is a short-cutting and then but || is a short-cutting or else (so they may not evaluate their … Read more