32 lines
1.3 KiB
Go
32 lines
1.3 KiB
Go
package go_koans
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import "fmt"
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func testStrings() {
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assert("a" + "bc" == "abc") // string concatenation need not be difficult
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assert(len("abc") == 3) // and bounds are thoroughly checked at compile time
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assert("abc"[0] == 'a') // their contents are reminiscent of C
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assert("smith"[2:] == "ith") // slicing may omit the end point
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assert("smith"[:4] == "smit") // or the beginning
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assert("smith"[2:4] == "it") // or neither
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assert("smith"[:] == "smith") // or both
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assert("smith" == "smith") // they can be compared directly
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assert("smith" > "foo") // and allow correct but generally useless comparisons
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assert("smith" < "zoo") // i suppose maybe this could be useful.. someday
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bytes := []byte{'a', 'b', 'c'}
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assert(string(bytes) == "abc") // strings can be created from byte-slices
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bytes[0] = 'z'
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assert(string(bytes) == "zbc") // byte-slices can be mutated, although strings cannot
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assert(fmt.Sprintf("hello %s", "world") == "hello world") // our old friend sprintf returns
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assert(fmt.Sprintf("hello \"%s\"", "world") == "hello \"world\"") // quoting is familiar
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assert(fmt.Sprintf("hello %q", "world") == "hello \"world\"") // although it can be done easilier
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assert(fmt.Sprintf("your balance: %d and %0.2f", 3, 4.5589) == "your balance: 3 and 4.56") // "the root of all evil" is actually a misquotation, by the way
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}
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