[英]How to configure and lookup enums in Javascript
Using this technique to setup enums in javascript, I would now like to search based on some other variable in my function below. 使用这种技术在javascript中设置枚举,我现在想在下面的函数中基于其他变量进行搜索。
Here's the enum config: 这是枚举配置:
var enums_instrumentType = Object.freeze({
CASH: 0,
EQUITY: 1,
COMPOSITE_INDEX:2 ,
EXCHANGE_RATE:3 ,
IR_INDEX: 4,
IR_SWAP_INDEX: 5
});
var enums_tenorUnit = Object.freeze({
DAY: 0,
WEEK: 1,
MONTH: 2,
YEAR: 3
});
function test(){
thisInstr = _.findWhere(instrumentsList, { id: mem.instrument_id }); // FIND IT !
var tenor_unit = thisInstr.ir_index.tenor.unit; // 0: DAY, 1: WEEK, etc.
var tenor_size = thisInstr.ir_index.tenor.size; // number of units
// HOW TO LOOKUP tenor_unt IN enums_tenorUnit, where tenor_unit is an integer value ???
} }
thanks in advance... Bob 提前谢谢......鲍勃
assuming tenor_unit
is something like 0
or 1
: 假设tenor_unit
类似于0
或1
:
var numericValue = _.keys(enums_tenorUnit)[tenor_unit];
however, if tenor_unit
is something like DAY
or WEEK
then simply: 但是,如果tenor_unit
类似DAY
或WEEK
那么简单地说:
var numericValue = enums_tenorUnit[tenor_unit];
alternatively, if you're looking for a boolean result rather than the literal value and if tenor_unit
is something like DAY
or WEEK
you could use the in
operator : 或者,如果您正在寻找布尔结果而不是文字值,并且如果tenor_unit
类似于DAY
或WEEK
,则可以使用in
运算符 :
var tenorUnitExists = tenor_unit in enums_tenorUnit;
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