[#BloombergLP-bdlc-BitArray-assign-07]
= xref:BloombergLP.adoc[BloombergLP]::xref:BloombergLP/bdlc.adoc[bdlc]::xref:BloombergLP/bdlc/BitArray.adoc[BitArray]::assign
:relfileprefix: ../../../
:mrdocs:

Replace a bit range in this array with bits from `srcArray`.

== Synopsis

Declared in `<bdlc_bitarray.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
assign(
    std::size_t dstIndex,
    xref:BloombergLP/bdlc/BitArray.adoc[BitArray] const& srcArray,
    std::size_t srcIndex,
    std::size_t numBits);
----

== Description

Replace the specified `numBits` in this array, beginning at the specified `dstIndex`, with values from the specified `srcArray` beginning at the specified `srcIndex`. The behavior is undefined unless `dstIndex + numBits <= length()` and `srcIndex + numBits <= srcArray.length()`. Note that, absent aliasing, this method has the same behavior as, but is more efficient than: ` remove(dstIndex, numBits); insert(dstIndex, srcArray, srcIndex, numBits); `

== Parameters

[cols="1,4"]
|===
| Name| Description
| *dstIndex*
| starting index in this array
| *srcArray*
| array providing the replacement bits
| *srcIndex*
| starting index in `srcArray`
| *numBits*
| number of bits to replace
|===


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