Life is too short to re-code everything all the time.
Here are some useful AWK library functions
gawk -f lib.awk -f yourOtherFiles
Copy the following files to your own directory: http://www.cs.pdx.edu/~timm/dm/lib.awk.
BEGIN {
Q = "\""; _ = SUBSEP; Inf = 1.99999*(2**(127)); NegInf = -1*2**(126); White="^[ \t\n\r]*$"; Number="^[+-]?([0-9]+[.]?[0-9]*|[.][0-9]+)([eE][+-]?[0-9]+)?$"; }
function barph(str) {print str>"/dev/tty"}
function die(str) {barph(str); exit 1}
These array store the size of the array in position Array[0].
function top(a) {return a[a[0]]}
function push(a,x, i) {i=++a[0]; a[i]=x; return i}
function push2(a,x,y, i) {i=++a[x,0]; a[x,i]=y; return i}
function pop(a, x,i) {
i=a[0]--;
if (!i) {return ""} else {x=a[i]; delete a[i]; return x}}
Arrays to strings.
function saya(s,a) {print s; print a2s(a)}
function a2s(a, n,pre,i,str) {
for(i in a) str= str pre "[" i "]=[" a[i] "]\n";
return str;
}
function number(x) { return x ~ Number }
function symbol(x) { return ! number(x) }
function blank(x) { return x~/^[ \t]*$/ }
function trimLeft(x) { sub(/^[ \t]*/,"",x); return x}
function trimRight(x) { sub(/[ \t]*$/,"",x); return x}
function trim(x, y) { return trimRight(trimLeft(x))}
function str2keys(str,keys,sep, n,i,tmp) {
n=split(str,tmp,sep);
for(i in tmp) keys[tmp[i]];
keys[0]=n;
}
function pairs2nums(str,pairs,sep, n,i,tmp) {
n=split(str,tmp,sep);
for(i=1;i<=n;i=i+2) {
paris[tmp[i]]=tmp[i+1]+0;
pairs[0]++;
}
}
function lhs(s) {return substr(s, 1, RSTART-1)}
function mid(s,x,y) {return substr(s, RSTART + x, RLENGTH - x - y)}
function rhs(s) {return substr(s, RSTART+RLENGTH)}
function odd(x) {return x % 2}
function even(x) {return ! odd(x)}
function most(x,y) { if (x>y) {return x} else {return y}}
function least(x,y) { if (x<y) {return x} else {return y}}
function round(x) { if (x<0) {return int(x-0.5)} else {return int(x+0.5)}}
function between(min,max) {
if (max==min) {return min}
else {return min+ ((max-min)*rand())}}
function mean(sumX,n) {return sumX/n}
function sd(sumSq,sumX,n) {return sqrt((sumSq-((sumX*sumX)/n))/(n-1))}
function exists(file, dummy, ret) {
ret=0;
if ( (getline dummy < file) >=0 ) {ret = 1; close(file)};
return ret;
}
The old symbol table trick. If the counter on this column is one...
function novel(x,val,counter) {return ++counterl[x,val]== 1}
... then this is the first time we have seen this symbol. So we have something new to remember.
function remember(x,val,symbols) {symbols[x,++symbols[x,0]]=val}
Tim Menzies ,
tim@menzies.us,
http://menzies.us
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