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Diffstat (limited to 'slide.saty')
| -rw-r--r-- | slide.saty | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/slide.saty b/slide.saty new file mode 100644 index 0000000..f8f38d5 --- /dev/null +++ b/slide.saty @@ -0,0 +1,305 @@ +@require: class-slydifi/theme/akasaka +@require: code-printer/code-design +@require: code-printer/code-printer +@require: code-printer/code-syntax +@require: code-printer/code-theme +@require: figbox/figbox + +let-block +code-block-php source = + '< + +code-printer?:( + CodePrinter.make-config CodeSyntax.php CodeTheme.iceberg-light + |> CodePrinter.set-number-fun CodeDesign.number-fun-null + )(source); + > + +let-block +code-block-c source = + '< + +code-printer?:( + CodePrinter.make-config CodeSyntax.c CodeTheme.iceberg-light + |> CodePrinter.set-number-fun CodeDesign.number-fun-null + )(source); + > + +open FigBox +in + +document '< + +set-config(| + SlydifiThemeAkasaka.default-config with + color-emph = Color.black; + |); + + +make-title(| + title = { + |list でない array の末尾を探す + |}; + author = {|nsfisis (いまむら)|}; + date = {|第151回PHP勉強会＠東京|}; + |); + + %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + + +frame{自己紹介}< + +fig-center(vconcat [ + gap 75pt; + hconcat [ + textbox{nsfisis (いまむら)}; + gap 20pt; + include-image 50pt `assets/me.jpeg`; + ]; + gap 20pt; + textbox{\@ デジタルサーカス株式会社}; + ]); + > + + %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + + +frame{配列の末尾挿入}< + +code-block-php(`<?php + +$xs = [1, 2, 3]; +$xs[] = 42; +assert($xs[3] === 42); +`#); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + "a" => 1, + "b" => 2, + "c" => 3, +]; +$xs[] = 42; +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + "a" => 1, + "b" => 2, + "c" => 3, +]; +$xs[] = 42; +assert($xs[0] === 42); +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + 0 => 1, + 1 => 2, + 3 => 4, +]; +$xs[] = 42; +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + 0 => 1, + 1 => 2, + 3 => 4, +]; +$xs[] = 42; +assert($xs[4] === 42); +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + -10 => 1, + -7 => 2, + -5 => 4, +]; +$xs[] = 42; +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + -10 => 1, + -7 => 2, + -5 => 4, +]; +$xs[] = 42; +assert($xs[-4] === 42); +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = []; +$xs[10] = 1; +$xs[] = 42; +$xs[5] = 2; +$xs[] = 57; +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = []; +$xs[10] = 1; +$xs[] = 42; +$xs[5] = 2; +$xs[] = 57; +assert($xs[11] === 42); +assert($xs[12] === 57); +`); + > + + +section{|php-srcを読む|}< + +frame{ZEND_ASSIGN_DIM}< + +listing{ + * \inline-code(`Zend/zend_vm_opcodes.h`); + ** PHP の VM (virtual machine) の opcode (operation code) 一覧 + } + > + + +frame{ZEND_ASSIGN_DIM}< + +listing{ + * \inline-code(`Zend/zend_vm_opcodes.h`); + ** PHP の VM (virtual machine) の opcode (operation code) 一覧 + * \inline-code(`ZEND_ASSIGN_DIM`); + ** 配列への代入 (assign dimensional) + } + > + + +frame{ZEND_ASSIGN_DIM}< + +listing{ + * \inline-code(`Zend/zend_vm_opcodes.h`); + ** PHP の VM (virtual machine) の opcode (operation code) 一覧 + * \inline-code(`ZEND_ASSIGN_DIM`); + ** 配列への代入 (assign dimensional) + * \inline-code(`Zend/zend_vm_def.h`); + ** 各 opcode のハンドラが定義されている + } + > + + +frame{php-srcを読むヒント}< + +listing{ + * \inline-code(`EXPECTED`); + ** よく通るパス。最も一般的なケース + * \inline-code(`UNEXPECTED`); + ** ほとんど通らないパス。エラー処理など + } + > + + +frame{zend_hash_next_index_insert}< + +code-block-c(`value = zend_hash_next_index_insert( + Z_ARRVAL_P(object_ptr), + value +);`); + +p{※説明のためやや改変} + > + + +frame{zend_hash_next_index_insert}< + +code-block-c(`zval* zend_hash_next_index_insert( + HashTable *ht, + zval *pData +) { + return _zend_hash_index_add_or_update_i( + ht, + ht->nNextFreeElement, /* 挿入先のインデックス */ + pData, + HASH_ADD | HASH_ADD_NEXT + ); +} +`); + +p{※説明のためやや改変} + > + + +frame{nNextFreeElement}< + +listing{ + * \inline-code(`Zend/zend_hash.c`); + * \inline-code(`_zend_hash_index_add_or_update_i()`); + } + > + + +frame{nNextFreeElement}< + +listing{ + * \inline-code(`Zend/zend_hash.c`); + * \inline-code(`_zend_hash_index_add_or_update_i()`); + } + +p{ + \inline-code(`array`);に数値のキーで代入したとき、そのキーが\inline-code(`nNextFreeElement`);以上なら、その値+1になる + } + > + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + "a" => 1, + "b" => 2, + "c" => 3, +]; +$xs[] = 42; +assert($xs[0] === 42); +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + 0 => 1, + 1 => 2, + 3 => 4, +]; +$xs[] = 42; +assert($xs[4] === 42); +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = [ + -10 => 1, + -7 => 2, + -5 => 4, +]; +$xs[] = 42; +assert($xs[-4] === 42); +`); + > + + +frame{PHP クイズ}< + +code-block-php(`<?php + +$xs = []; +$xs[10] = 1; +$xs[] = 42; +$xs[5] = 2; +$xs[] = 57; +assert($xs[11] === 42); +assert($xs[12] === 57); +`); + > + + +frame{おまけ}< + +code-block-php(`<?php +$xs = [1, 2, 3]; +$xs[] += 10; +`); + +p{末尾代入と複合代入演算子は同時に使える} + > + +> |