Tutorial by Topics: conditional

X?.Y; //null if X is null else X.Y X?.Y?.Z; //null if X is null or Y is null else X.Y.Z X?[index]; //null if X is null else X[index] X?.ValueMethod(); //null if X is null else the result of X.ValueMethod(); X?.VoidMethod(); //do nothing if X is null else call X.VoidMethod(); Note that w...

Conditional expressions, involving keywords such as if, else if, and else, provide Swift programs with the ability to perform different actions depending on a Boolean condition: True or False. This section covers the use of Swift conditionals, Boolean logic, and ternary statements. For more in...

[[ -OP $filename ]] [[ $file1 -OP $file2 ]] [[ -z $string ]] [[ -n $string ]] [[ "$string1" == "$string2" ]] [[ "$string1" == $pattern ]] The [[ … ]] syntax surrounds bash built-in conditional expressions. Note that spaces are required on either side of th...

Conditional expressions, involving keywords such as if, elif, and else, provide Python programs with the ability to perform different actions depending on a boolean condition: True or False. This section covers the use of Python conditionals, boolean logic, and ternary statements. <expressi...

Note that the do...end syntax is syntactic sugar for regular keyword lists, so you can actually do this: unless false, do: IO.puts("Condition is false") # Outputs "Condition is false" # With an `else`: if false, do: IO.puts("Condition is true"), else: IO.puts(&q...

In contrast to Java's switch, the when statement has no fall-through behavior. This means, that if a branch is matched, the control flow returns after its execution and no break statement is required. If you want to combine the bahaviors for multiple arguments, you can write multiple arguments sep...

<element v-if="condition"></element> //v-if <element v-if="condition"></element><element v-else="condition"></element> //v-if | v-else <template v-if="condition">...</template> //templated v-if <element ...

Official docs explains playbook conditionals. http://docs.ansible.com/ansible/playbooks_conditionals.html Ansible (github) https://github.com/marxwang/ansible-learn-resources

if cond; body; end if cond; body; else; body; end if cond; body; elseif cond; body; else; end if cond; body; elseif cond; body; end cond ? iftrue : iffalse cond && iftrue cond || iffalse ifelse(cond, iftrue, iffalse) All conditional operators and functions involve using boole...

Important point to note while using condition The condition class is referred as direct class (not as spring bean) so it can't use the @Value property injection i.e. no other spring beans can be injected within it. From java docs - Conditions must follow the same restrictions as BeanFactoryPos...

Mixin with Guards .mixin-name(<arguments>) when <is-negation> (<ref-variable> <operator> <value>) CSS Guards <selector> when <is-negation> (<ref-variable> <operator> <value>) ParameterDetailsargumentsThe variables that are passed...

if(expression){} if(expression){}else{} if(expression){}elseif(expression){} if(expression){}elseif(expression){}else{} See also Comparison Operators, which can be used in conditional expressions.

Hope the sample illustration above helps someone who struggled like me to make rows conditionally select, as default functionality of DevExpress selects all rows irrespective whether it has a 'checkbox' or not (when you use either ASPxGridView1.SelectAllRowsOnPage() or ASPxGridView1.SelectRows(),...

Platform based conditional compiling comes in two forms in Go, one is with file suffixes and the other is with build tags. After "// +build", a single platform or a list can follow Platform can be reverted by preceding it by ! sign List of space separated platforms are ORed togethe...

Conditional variables are useful in cases where you want a thread to wait for something that happens in another thread. For instance, in a producer/consumer scenario with one or or more producing threads and one consuming thread, conditional variables can be used to signal the consuming thread that ...

Progress ABL supports two contitional statements: IF/THEN/ELSE and CASE.