let newProblem = Object.assign({}, this.curproblem);
newProblem.id = ret.id;
newProblem.uid = this.st.user.id;
newProblem.uname = this.st.user.name;
this.problems = [newProblem].concat(this.problems);
let newProblem = Object.assign({}, this.curproblem);
newProblem.id = ret.id;
newProblem.uid = this.st.user.id;
newProblem.uname = this.st.user.name;
this.problems = [newProblem].concat(this.problems);