I have recently created a micro library that provides case-insensitive string helpers: https://github.com/nickuraltsev/ignore-case. (It uses toUpperCase internally.) var ignoreCase = require('ignore-case'); ignoreCase.equals('FOO', 'Foo'); // => true ignoreCase.startsWith('foobar', 'FOO'...
Be very careful when checking if a variable is equal to a certain value. Be sure not to mix up the “=” and “==” signs. The first one (“=”) would set the variable to the value you wanted to compare it with, and the other one would compare it to the value and return ...
it; var assert = require('chai').assert; testCase('Array', function() { pre(function() { // ... }); testCase('#indexOf()', function() { assertions('should return -1 when not present', function() { assert.equal([1, 2, 3].indexOf(4), -1); }); }); }); ...
当作为一个构造函数(带有运算符 new)调用时,Boolean() 将把它的参数转换成一个布尔值,并且返回一个包含该值的 Boolean 对象。 如果作为一个函数(不带有运算符 new)调用时,Boolean() 只将把它的参数转换成一个原始的布尔值,并且返回这个值,如果省略 value 参数,或者设置为0、-0、null、""、false、undefined...
Also note that JSON.stringify() removes properties that are set to undefined, and that therefore comparisons using this form will ignore properties set to the value undefined. Functions should be considered equal only if they share the same reference, not just the same code, because this would...
(a,b){return(a.value-b.value)});// sort by nameitems.sort(function(a,b){varnameA=a.name.toUpperCase();// ignore upper and lowercasevarnameB=b.name.toUpperCase();// ignore upper and lowercaseif(nameA<nameB){return-1;}if(nameA>nameB){return1;}// names must be equalreturn0;}...
}//if the new value is equal to the current one, just ignore}else{break; } } } },//more code}; 在二叉搜索树中添加值时,特殊情况是在没有根的情况。在这种情况下,只需将根设置为新值即可轻松完成工作。对于其他情况,基本算法与 contains() 中使用的基本算法完全相同:新值小于当前节点向左,如果值...
// 对Object扩展一个方法chargeObjectEqualObject.prototype.chargeObjectEqual=function(obj){// 当前Object对象varpropsCurr =Object.getOwnPropertyNames(this);// 要比较的另外一个Object对象varpropsCompare =Object.getOwnPropertyNames(obj);if(propsCurr.length!= propsCompare.length) {returnfalse; ...
right; } //if the new value is equal to the current one, just ignore } else { break; } } } }, //more code }; 在二叉搜索树中添加值时,特殊情况是在没有根的情况。在这种情况下,只需将根设置为新值即可轻松完成工作。对于其他情况,基本算法与 contains() 中使用的基本算法完全相同:新值...
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