10 examples of 'js check if string in array' in JavaScript

4
function checkArrayForString(arr, string) {
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    for(let i = 0; i < arr.length; i++) {
6
        if(arr[i].indexOf(string) > -1) {
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            return true;
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        }
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    };
10
    return false;
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}

75
function strInArray(str, ar) {
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  if (typeof ar === 'undefined') {
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    ar = exports.out;
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  }
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  for (var i in ar) {
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    if (ar[i].indexOf(str) !== -1) {
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      return true;
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    }
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  }
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  return false;
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}

119
function checkIsNumberArrayString(str) {
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    if (!str.match(/^\s*(((\s*(-|\+)?((\.\d+)|(\d+\.\d+)|(\d+)|(\d+(\.\d+)?e(-|\+)?(\d+)))\s*,){0,2}(\s*(-|\+)?((\.\d+)|(\d+\.\d+)|(\d+)|(\d+(\.\d+)?e(-|\+)?(\d+)))))|((\s*(-|\+)?((\.\d+)|(\d+\.\d+)|(\d+)|(\d+(\.\d+)?e(-|\+)?(\d+)))\s){0,2}(\s*(-|\+)?((\.\d+)|(\d+\.\d+)|(\d+)|(\d+(\.\d+)?e(-|\+)?(\d+))))))\s*$/g))
121
        throw new Error(`Attribute must be a comma- or space-separated sequence of up to three numbers, for example "1 2.5 3". Yours was "${str}".`)
122
}

40
function isNonEmptyStringArray( theArray ) {
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	var index;
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	if ( Array.isArray( theArray ) && theArray.length > 0 ) {
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		for ( index in theArray ) {
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			if ( typeof theArray[ index ] !== "string" ) {
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				return false;
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			}
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		}
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		return true;
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	}
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	return false;
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}

15
export function isArrayOfStrings(value) {
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  return isArray(value) && value.every(isString);
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}

20
public static isFilledStringArray(arr: any[]): boolean {
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    if (!arr || !Array.isArray(arr)) {
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        return false;
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    }
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    for (let element of arr) {
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        if (typeof element !== 'string' || element.trim() === '') {
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            return false;
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        }
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    }
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    return true;
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}

136
function isStringArray(x: any): x is string[] {
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  return Array.isArray(x) && x.every(el => typeof el === 'string');
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}

8
public isString(value: any) {
9
  return typeof value === 'string' || value instanceof String;
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}

120
private validateArray(input: StringInput, type: ArrayType): boolean {
121
  const validateItems = () =>
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    !(input.value as [])
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      .map((v, index) =>
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        this.run(
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          { name: `${input.name}[${index}]`, value: `${v}` },
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          type.elementType
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        )
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      )
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      .some(v => v === false);
130
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  return Array.isArray(input.value) && validateItems();
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}

35
public isEmpty(value: any) {
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  for (let key in value) {
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    if (value.hasOwnProperty(key)) {
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      return false;
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    }
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  }
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  return true;
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}