6/21/2023 0 Comments Turn a oneradio![]() ![]() Amplitude refers to the size of a wave, whereas frequency refers to how many waves arrive each second. In this way, radio waves are much like ocean waves. To understand how this works, it's important to understand that all radio waves are made up of three parts: wavelength, amplitude, and frequency. With all sorts of radio waves flying through the air, why doesn't your radio sound like a mixture of all the stations out there broadcasting a signal? Instead of gibberish, you can tune into a single radio station amongst all those signals in the air thanks to the tuner inside your radio. Your radio's antenna picks up those radio waves and channels them to electric circuits inside your radio that convert them into sounds you can hear. Have you ever WONDERed why you can only hear one radio station at a time? If you're familiar with the basics of how radios work, you know that there are all sorts of invisible radio waves flying through the air all around you all the time. As they scroll through the dial, you may hear snippets of all sorts of stations, from hip hop and pop to country and local news. When you're driving to the store or to church, your parents may surf through the dial searching for a radio station that fits the mood. One place many kids today experience the radio is in the family car. Years ago, your parents probably tuned their FM radios to their favorite station and danced along to whatever was playing, just waiting for their favorite song to be played. With millions of songs available via the Internet and the click of a mouse, we've grown accustomed to choosing exactly what we want to hear when we want to hear it.īefore the digital music revolution, that wasn't always the case. What are we talking about? The radio, of course!Ĭhances are your older friends and relatives have more experience with and memories of the radio. But how do you listen to that music? While some kids will plug headphones into their digital music player, others will turn the knob on a much older, yet still popular device. Fill the update attribute with a space-separated list of the components you need to update, excluding the inputText components, because you want to preserve their values, and their required status will be evaluated only when submitting the entire form.Do you like to listen to music when you do homework? Somehow those math problems seem simpler to solve if you're bobbing your head to the latest beats. Remove the process attribute to in order to make selectOneRadio trigger a partial Ajax request, that only submits the selectOneRadio itself. How can I change set of required fields on selectOneRadio change without losing data and without premature validation errors? > the values entered into fields F1, F2 disappear. Then, if I change my mind select second radio value - I get validation error (that field F1 is required). If I select first radio value, field F1 changes to required. ![]() Methods nditionX check the value of radio (and one more condition) and return true/false. If user selects first value of selectOneRadio - field F1 should be required, if second - field F2. ![]() There is a form with multiple inputFields and a selectOneRadio (and some action button at the end):
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