feat(strings): add currency formatters

thi-ng · Dec 1, 2021 · 52b7340 · 52b7340
1 parent 112ba7e
commit 52b7340
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Showing 6 changed files with 35 additions and 3 deletions.
diff --git a/packages/csv/src/transforms.ts b/packages/csv/src/transforms.ts
@@ -21,6 +21,13 @@ export const hex =
     (x) =>
         maybeParseInt(x, defaultVal, 16);
 
+export const date =
+    (defaultVal = 0): CellTransform =>
+    (x) => {
+        const res = Date.parse(x);
+        return isNaN(res) ? defaultVal : res;
+    };
+
 // formatters
 
 export const zeroPad = (digits: number) => padLeft(digits, "0");

diff --git a/packages/strings/README.md b/packages/strings/README.md
@@ -32,7 +32,7 @@ This project is part of the
 
 ## About
 
-Various (80+) string formatting, word wrapping & utility functions, some
+Various (~100) string formatting, word wrapping & utility functions, some
 higher-order, some memoized.
 
 Partially based on Clojure version of [thi.ng/strf](http://thi.ng/strf).
@@ -48,6 +48,7 @@ Partially based on Clojure version of [thi.ng/strf](http://thi.ng/strf).
 
 ### Numeric formatters
 
+- `currency` / `chf` / `eur` / `gpb` / `usd` / `yen`
 - `radix`
 - `int` / `intLocale`
 - `float` / `floatFixedWidth`
@@ -142,7 +143,7 @@ node --experimental-repl-await
 > const strings = await import("@thi.ng/strings");
 ```
 
-Package sizes (gzipped, pre-treeshake): ESM: 4.53 KB
+Package sizes (gzipped, pre-treeshake): ESM: 4.63 KB
 
 ## Dependencies
 

diff --git a/packages/strings/package.json b/packages/strings/package.json
@@ -97,6 +97,9 @@
         "./center": {
             "import": "./center.js"
         },
+        "./currency": {
+            "import": "./currency.js"
+        },
         "./cursor": {
             "import": "./cursor.js"
         },

diff --git a/packages/strings/src/currency.ts b/packages/strings/src/currency.ts
@@ -0,0 +1,19 @@
+import { memoizeJ } from "@thi.ng/memoize/memoizej";
+import type { Stringer } from "./api.js";
+
+export const currency = <
+    (sym: string, pre?: boolean, prec?: number) => Stringer<number>
+>memoizeJ((sym: string, pre = true, prec = 2) => {
+    const ff = (x: number) => x.toFixed(prec);
+    return pre ? (x: number) => sym + ff(x) : (x: number) => ff(x) + sym;
+});
+
+export const chf = currency("CHF ");
+
+export const eur = currency("€");
+
+export const gbp = currency("£");
+
+export const usd = currency("$");
+
+export const yen = currency("¥");
diff --git a/packages/strings/src/index.ts b/packages/strings/src/index.ts
@@ -3,6 +3,7 @@ export * from "./api.js";
 export * from "./ansi.js";
 export * from "./case.js";
 export * from "./center.js";
+export * from "./currency.js";
 export * from "./cursor.js";
 export * from "./entities.js";
 export * from "./escape.js";

diff --git a/packages/strings/tpl.readme.md b/packages/strings/tpl.readme.md
@@ -11,7 +11,7 @@ This project is part of the
 
 ## About
 
-Various (80+) string formatting, word wrapping & utility functions, some
+Various (~100) string formatting, word wrapping & utility functions, some
 higher-order, some memoized.
 
 Partially based on Clojure version of [thi.ng/strf](http://thi.ng/strf).
@@ -27,6 +27,7 @@ Partially based on Clojure version of [thi.ng/strf](http://thi.ng/strf).
 
 ### Numeric formatters
 
+- `currency` / `chf` / `eur` / `gpb` / `usd` / `yen`
 - `radix`
 - `int` / `intLocale`
 - `float` / `floatFixedWidth`