<current>
<city id="704508" name="Kramatorsk">
<coord lon="37.56" lat="48.72"/>
<country>UA</country>
<sun rise="2018-03-18T03:35:32" set="2018-03-18T15:40:30"/>
</city>
<temperature value="-7.54" min="-7.54" max="-7.54" unit="metric"/>
<humidity value="88" unit="%"/>
<pressure value="1008.17" unit="hPa"/>
<wind>
<speed value="8.2" name="Fresh Breeze"/>
<gusts/>
<direction value="74.5015" code="ENE" name="East-northeast"/>
</wind>
<clouds value="92" name="overcast clouds"/>
<visibility/>
<precipitation mode="no"/>
<weather number="804" value="overcast clouds" icon="04n"/>
<lastupdate value="2018-03-18T21:19:45"/>
</current>

nothing="".toReal(); //0
space=" ".toReal(); //0
minus="-".toReal(); //0
exp="2.1E-02".toReal(); //0.021
without0=".314".toReal(); //0.314
pi="3.14".toReal(); //3.14
function toRealEVal1(str)
{
	if (str.length) 
		return str;
	else 
		return EVAL_REAL;
}
nothing1=toRealEVal1(""); //-1.79e+308==EVAL_REAL
function toRealEVal2(str)
{
	if (str.search("^(?:\+|\-)?(?:(?:\d+)|(?:\d+\.)|(?:\.\d+)|(?:\d+\.\d+)){1}(?:e(?:\+|\-)?\d+)?$","i") > -1 )
		return str;
	else 
		return EVAL_REAL;
}
nothing2=toRealEVal2(""); //-1.79e+308==EVAL_REAL
space2=toRealEVal2(" "); //-1.79e+308==EVAL_REAL
minus2=toRealEVal2("-"); //-1.79e+308==EVAL_REAL
exp2=toRealEVal2("2.1E-02"); //0.021
without02=toRealEVal2(".314"); //0.314
pi2=toRealEVal2("3.14"); //3.14