var str = ' a b c d e f g ';
function removeSpace(value, type) {
var headPattern = /^\s+/g;
var tailPattern = /\s+$/g;
var headAndTailPattern = /^\s+|\s+$/g;
var middlePattern = /(\S)\s+(\S)/g;
var pattern = /\s+/g;
if (type === 'head') {
return value.replace(headPattern, '');
} else if (type === 'tail') {
return value.replace(tailPattern, '');
} else if (type === 'head_and_tail') {
return value.replace(headAndTailPattern, '');
} else if (type === 'middle') {
while (middlePattern.exec(value)) {
value = value.replace(middlePattern, '$1$2');
}
return value;
} else {
return value.replace(pattern, '');
}
}
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