# Utils ## CUI.util.assert\(condition, caller, description, debug\) | Parameter | Type | Comment | | :--- | :--- | :--- | | condition | Boolean | Condition to evaluate | | caller | String | The caller | | description | String | Additional information | | debug | Map | Debug Output | **CUI.defaults.asserts** determines whether an assert check is performed or not. Default is _true_. **CUI.defaults.asserts\_alert** determines, what happens in case of an assert: * _debugger_: Starts the debugger * _js_: Uses Javascript window.alert to display the assert. * _cui_: Uses CUI.problem to display * _off_: Surpresses the assert In all cases, an **window.Error** is thrown. Default is _off_. ### Example ``` assert(typeof(myvar) == "string", "new MyClass", "myvar needs to be string", myvar: myvar) ``` ## CUI.util.isUndef\(obj\) Returns true if obj is undefined. ## CUI.util.isNull\(obj\) Returns true if obj is null. An object is null if it is undefined or null. ## CUI.util.isString\(obj\) Returns true if obj is String. ## CUI.util.isEmpty\(obj\) Returns true if obj is empty. An object is empty, if it is null, "", false, [], or {}. ## CUI.util.isTrue\(obj\) Returns true if obj is true. True is 1, true, "1" or "true". ## CUI.util.isFalse\(obj\) Returns true if obj is false. False is 0, false, "0" or "false". ## CUI.util.isBoolean\(obj\) Returns true if obj is true or false. ## CUI.util.isElement\(obj\) Returns true if obj is instance of HTMLElement. ## CUI.util.isInteger\(obj\) Returns true if obj is a number and and Integer. ## CUI.util.isPosInt\(obj\) Returns true if obj is a positive Integer. ## CUI.util.isFloat\(obj\) Returns true if obj is a number and Float. ## CUI.util.isPromise\(obj\) Returns true if obj is a CUI.Promise or CUI.Deferred. ## CUI.util.isContent\(obj\) Returns true if obj is considered a CUI-Content, that is HTMLElement, HTMLCollection, NodeList, Array, Function, or an object with a DOM-property which is an HTMLElement. ## CUI.util.isDeferred\(obj\) Returns true if obj is a CUI.Deferred. ## CUI.util.escapeRegExp\(str\) Returns **str **escaped for use inside a RegExp. ## CUI.util.getObjectClass\(obj\) Returns the name of the Function used to create **obj**. ## CUI.util.getInt\(str\) Returns the parsed Integer or null if no Integer is received. ## CUI.util.getIntOrString\(str\) Checks str, if it is parses as Integer, returns the Integer, str otherwise. ## CUI.util.getFloat\(str\) Returns the str parsed as Float, or null if otherwise. ## CUI.util.xor\(a, b\) Returns a XOR b. Returns true if a or b are considered true, false if a and b are both true or false. ## CUI.util.toHtml\(str, space2nbsp\) Returns str HTML-escaped, replaces space chars with if second parameter is given. ## CUI.util.toDash\(str\) Returns str converted from CamelCase to a dash-notation. ## CUI.util.toCamel\(str, include\_first\) Returns str converted from dash-notation to CamelCase. include\_first can be set to true, to also camel-case the first character. ## CUI.util.toClass\(str\) Returns str suitable to be used as class name. Replaces \_ to - and spaces to -. ## CUI.util.toDot\(str\) Returns str suitable to be used in CSS, replaces - to . ## CUI.util.removeFromArray\(value, array, compFunc\) Removes **value **from **array**. Returns number of items removed. A **compFunc** can be used to return \_true \_or \_false \_for each item in array. If **compFunc **is set, **value **is ignored. ## CUI.util.pushOntoArray\(value, array, compFunc\) Appends **value **to the given **array**, if is not already in **array**. A **compFunc** can be used to return \_true \_or \_false \_on each item in array. Returns the idx of the pushed or existing **value**. ## CUI.util.idxInArray\(value, array, compFunc\) Returns the index of the given **value **in **array**. -1 if not found. A **compFunc** can be used to return \_true \_or \_false \_for each item in array. If **compFunc **is set, **value **is ignored. ## CUI.util.findInArray\(value, array, compFunc\) Returns the item in **array **either matching **value **or using the **compFunc**. This is a handy function for searching thru an Array of Maps, where you want to match a certain property of the Map values. ## CUI.util.compareIndex\(a, b\) Returns _-1_ if a < b, _1_ if a > b and _0_ otherwise. ## CUI.util.copyObject\(obj, deep\) Returns a copy of the obj. With deep set to true, a deep copy is created. For instances of CUI.Element the "copy" method is called. Types which are copied: * string * number * boolean * function \(as reference\) * null * undefined * CUI.Element \(copy method is called\) * CUI.Dummy \(as reference\) * HTMLElement \(as reference\) * Map * Array ## CUI.util.dump\(obj, space\) Returns a String suitable for output in console.debug. This replaces all undefined and null values by "<undefined>" and "<null>" resp., and then calls **JSON.stringify** to obtain a printable String of **obj**. **space **is passed to JSON.stringify to format the JSON, defaults to _\t_. ## CUI.util.alert\_dump\(obj\) Uses window.alert to dump obj to a Javascript-Alert. ## CUI.util.utoa\(str\) Returns Base64 encoded ASCII representation of the passed UCS-2 String. ## CUI.util.atou\(str\) Returns UCS-2 String representation from passed Base64 encoded ASCII. ## String.prototype.startsWith\(str\) Implements **startsWith **for Strings. ## String.prototype.endsWith\(str\) Implements **endsWith **for Strings. ## RegExp.escape\(str\) Returns **str **escaped for use inside a RegExp.