换行的字符串 "This string\nhas two lines" 字符串中使用单引号时应该怎么写 'You\'re right, it can\'t be a quote' 把数字变成字符串并保留两位小数 var n = 123456.789 n.toFixed(0); //"123457" n.toFixed(2); //"123456.79" parseFloat(str)str以非数字开头,则返回NaN parseFloat(str)
JS数字千分: 1.例子:1000--->1,000 2.实现如下: salesToFormat: function (num) { var num = (num || 0).toString(), result = ''; while (num.length > 3) {//拿掉num的最后三位给result result = ',' + num.slice(-3) + result; num = num.slice(0, num.length - 3); } if (num) { resu
如果想在CentOS 6 中安装Node.js >4.0,如果通过以往的方式安装: wget http://nodejs.org/dist/v4.0.0/node-v4.0.0.tar.gz tar zvxf node-v4.0.0.tar.gz cd node-v4.0.0 ./configure make && make install 会遇到报错提示: WARNING: C++ compiler too old, need g++ 4.8 or clang++ 3.4 (CXX