我想将网页转换为leet(1337)speakwithXPath和PHP。它可以仅使用PHP来完成,但随后HTML节点也被leetspeak替换。示例($html是网页):$find=array("a","b","c","d","e","f","g","h","i","j"."k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z");$repl=array("4","b","c","d","3","f","g","h","1","j","k","1","m","n","0","p","9","r","5","7","
我对Apple在speakhereexample中使用的数学有疑问.一点背景知识:我知道AVAudioRecorder和AVAudioPlayer返回的平均功率和峰值功率以dB为单位。我也理解为什么RMS功率以dB为单位并且需要使用pow(10,(0.5*avgPower))将其转换为放大器。我的问题是:Apple使用这个公式来创建它的“仪表表”MeterTable::MeterTable(floatinMinDecibels,size_tinTableSize,floatinRoot):mMinDecibels(inMinDecibels),mDecibelResolution(mM