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Utils.isObject(null);
Utils.checkEmptyObject("");
Check out JavaScript utility methods at JavaScript Utility Methods
TypeScript Utility Methods
export class Utils {
/**
*
* @param val Check for null Object
*/
public static isObject(val) {
if (val === null) {
return false;
}
return ((typeof val === 'function') || (typeof val === 'object'));
}
/**
* Parse JSON string
*/
public static parseJSON(data) {
data = data || "";
return JSON.parse(data);
}
/**
* Check empty object
*/
public static checkEmptyObject(obj) {
for (var key in obj) {
if (obj.hasOwnProperty(key))
return false;
}
return true;
}
/**
* Check if the string is empty or null
*/
public static checkNotNullAndNotEmpty(data) {
if (data !== null && data !== '') {
return true;
}
return false;
}
/**
* Check if the variable is undefined
*/
public static isUndefined(data) {
if (data === "undefined") {
return true;
}
return false;
}
/**
* Searches for a given substring
*/
public static contains(str, substring, fromIndex) {
return str.indexOf(substring, fromIndex) !== -1;
}
/**
* "Safer" String.toLowerCase()
*/
public static lowerCase(str) {
return str.toLowerCase();
}
/**
* "Safer" String.toUpperCase()
*/
public static upperCase(str) {
return str.toUpperCase();
}
/**
* UPPERCASE first char of each word.
*/
public static properCase(str) {
return this.lowerCase(str).replace(/^\w|\s\w/g, this.upperCase);
}
/**
* UPPERCASE first char of each sentence and lowercase other chars.
*/
public static sentenceCase(str) {
// Replace first char of each sentence (new line or after '.\s+') to
// UPPERCASE
return this.lowerCase(str).replace(/(^\w)|\.\s+(\w)/gm, this.upperCase);
}
}
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