omg, vyser sa na validátor, načo ti je? uvedom si, načo validátor slúži - na kontrolu. ak sa tvoj kód nejak neočakávane správa, tak ho preženieš validátorom a možno zistíš, kde je chyba. pri iných situáciách je validovanie stratou času. takže - ak máš svoj kód vpohode, vykašli sa na validátor.
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A. S. Tanenbaum píše: The terms LF, MF, and HF refer to low, medium, and high frequency, respectively. Clearly, when the names were assigned, nobody expected to go above 10 MHz, so the higher bands were later named the Very, Ultra, Super, Extremely, and Tremendously High Frequency bands. Beyond that there are no names, but Incredibly, Astonishingly, and Prodigiously high frequency (IHF, AHF, and PHF) would sound nice. | 
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