
n.考慮未來(預(yù)先作準(zhǔn)備
Positive lookahead and lookbehind do not backtrack. 積極的預(yù)測(cè)先行和追溯不回溯。
This “l(fā)ookahead” into cool/hot spot movement is supplied to you each turn. 這些對(duì)于冷/熱場(chǎng)的的移動(dòng)信息在每次移動(dòng)之前會(huì)提供給你。
Provides information about regular expression lookahead and lookbehind behavior. 提供關(guān)于正則表達(dá)式預(yù)測(cè)先行和追溯行為的信息。
Assertions do not change: lookahead looks to the right; lookbehind looks to the left. 斷言不改變:預(yù)測(cè)先行向右搜索;回顧后發(fā)向左搜索。
Our eyes are placed in front because it's more important to lookahead than to look back. 我們的眼睛長(zhǎng)在前面是因?yàn)橄蚯翱幢认蚝罂锤匾?