{* ../../docs_src/query_params_str_validations/tutorial003_an_py310.py hl[10] *}

## Agregar expresiones regulares

Puedes definir una <abbr title="Una expresión regular, regex o regexp es una secuencia de caracteres que define un patrón de búsqueda para strings.">expresión regular</abbr> `pattern` que el parámetro debe coincidir:

{* ../../docs_src/query_params_str_validations/tutorial004_an_py310.py hl[11] *}

            if (entity.getTerm().startsWith(regexPrefix)) {
                final String regex = entity.getTerm().substring(regexPrefix.length());
                if (StringUtil.isBlank(regex)) {
                    logger.warn("Unknown regex pattern: {}", entity.getTerm());
                } else {
                    pair.getSecond().add(new Pair<>(Pattern.compile(regex), entity.getContent()));
                }
            } else {

d=c.attr("data-sanitize-strip")||"";return a.split(d,function(c){var d=new RegExp(a.isNumeric(c)?c:"\\"+c,"g");b=b.replace(d,"")}),b},escape:function(b,c){var d=c.valAttr("is-escaped"),e={"<":"__%AMP%__lt;",">":"__%AMP%__gt;","&":"__%AMP%__amp;","'":"__%AMP%__#8217;",'"':"__%AMP%__quot;"};return"yes"===d?b:(c.valAttr("is-escaped","yes"),c.one("keyup",function(a){9!==a.keyCode&&c.valAttr("is-escaped","no")}),a.each(e,function(a,c){b=b.replace(new RegExp(a,"g"),c)}),b.replace(new RegExp("__%AMP%__","g"),"&"))}},e...

    /**
     * Adds a regular expression rule for the specified field.
     * @param key the field name to match against
     * @param regex the regular expression pattern
     */
    public void addRule(final String key, final String regex) {
        regexMap.put(key, Pattern.compile(regex));
    }

    /**
     * Adds a compiled regular expression rule for the specified field.

name:"swesec",validatorFunction:function(c,d){var e,f,g,h;if(d.valAttr("use-hyphen")){if(h=c.split("-"),2!==h.length)return!1;c=h.join("")}if(!c.match(/^(\d{4})(\d{2})(\d{2})(\d{4})$/))return!1;e=RegExp.$1,f=a.formUtils.parseDateInt(RegExp.$2),g=a.formUtils.parseDateInt(RegExp.$3);var i=parseInt(RegExp.$4.substring(2,3))%2===0?"female":"male";d.trigger("genderDerived",[i]),b.ssnGender=i;var j=[31,28,31,30,31,30,31,31,30,31,30,31];if((e%400===0||e%4===0&&e%100!==0)&&(j[1]=29),f<1||f>12||g<1||g>j[...

        assertEquals(0, results.length);
    }

    public void test_load_invalidRegex() {
        List<RelatedContent> testData = new ArrayList<>();
        testData.add(createRelatedContent("regex:", "Invalid Regex", ""));
        mockBhv.setTestData(testData);

        // Should not throw exception, just log warning
        relatedContentHelper.load();

    }

    public void setRegex_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setRegex_Terms("regex", opLambda, null);
    }

    public void setRegex_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsPathMappingCA> aggsLambda) {
        setRegex_Terms("regex", opLambda, aggsLambda);
    }

                                    <label for="regex" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.regex"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="regex"/>
                                        <la:text styleId="regex" property="regex" styleClass="form-control"/>

package schema

import (
	"regexp"
	"strings"

	"gorm.io/gorm/clause"
)

// reg match english letters and midline
var regEnLetterAndMidline = regexp.MustCompile(`^[\w-]+$`)

type CheckConstraint struct {
	Name       string
	Constraint string // length(phone) >= 10
	*Field
}

func (chk *CheckConstraint) GetName() string { return chk.Name }

func (chk *CheckConstraint) Build() (sql string, vars []interface{}) {

     * @param regex The regular expression to match URLs.
     * @param componentName The name of the component to register.
     */
    public synchronized void register(final String regex, final String componentName) {
        clientMap.put(regex, componentName);
        clientFactoryList.forEach(f -> load(f, regex, componentName));
    }

    /**