up
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parent
5372c18379
commit
3defacc09d
314 changed files with 1761 additions and 1704 deletions
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@ -0,0 +1,15 @@
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let ladder = {
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step: 0,
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up: function() {
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this.step++;
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return this;
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},
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down: function() {
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this.step--;
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return this;
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},
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showStep: function() {
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alert(this.step);
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}
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};
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